Mechanically Jointed Rodless Cylinder - SMC · Note 2) For operation outside the “Stroke...

CAT.ES20-165 A

Overall lengthreduced by140 mm

at the maximum *

Height reduced by 36% at the maximum*

∗ Comparison with Series MY1B

Scale: 100%(MY3A16-100)

Mechanically Jointed Rodless Cylinder

High functionality with reduced height and length

Series MY3A/3Bø16, ø25, ø40, ø63

BasicShort Type Standard Type

MY3A_3B.qxd 03.5.14 2:47 PM Page 1

Features 1

Series

MY3AMY3BMY1B

ø16

110

122

160

ø25

150

178

220

ø40

240

276

340

ø63

320

356

460

(mm)

Series

MY3AMY3B

MY1B

ø16

27

37

ø25

37

54

ø40

54

84

ø63

(mm)

MY1B (with air cushion)

MY3B (with air cushion)

MY3A (with rubber bumper)

MY1B MY3A/3B

High functionality with reduced height and length

Overall length (Z) reduced by 140 mm at the maximum

Overall Length (Z) Weight

Height (H) reduced by 36% at the maximum

Weight reduced by 53% at the maximum

Series

MY3AMY3BMY1B

ø16

0.34

0.35

0.73

ø25

0.99

1.09

1.57

ø40

2.95

3.08

4.41

ø63

8.26

8.99

14.5

(kg)

Height (H)

Hei

ght

Overall length (Z + Stroke)

∗ At a 100 mm stroke

Side support

Auto switch

Positioning cushion mechanism

Air cushion(MY3B)

Passage for centralized piping

The uniquely designed pis-ton shape enables reduction of the height and length as well as practical arrange-ment of the common piping passages, cushion mecha-nism and positioning mecha-nism. This has achieved drastic miniaturization and weight reduction.

MY3BMY3BMY3BMY3B

Mechanically Jointed Rodless Cylinder/Basic

MY3A/MY3BShort Type Standard Type(Rubber Bumper) (Air Cushion)

MY3AMY3AMY3A

84

116

MY3A_3B.qxd 03.5.14 2:47 PM Page 2

Features 2

Rubberbumper

Aircushion

Strokeadjusting

unit

Sidesupport

25 40 63

Bore size (mm)

16

Made toorder

Long stroke(-XB11)

Helical insert threads (-X168)Holder mount-ing bracket(-X416, X417)

Floatingbracket

MY3A

MY3B

Series Type Pipingtype

Basic standardtype

Basic shorttype Centralized

piping

Standardpiping

Series variationsSeries variationsSeries variationsSeries variations

Stroke adjusting unit

Side supports

The cylinder tube can be fixed from the upper or lower side (page 8).

Centralized piping

Can be mounted on both sidesfrom the front direction.

(MY3B only)

Floating bracket

Integrated piping in the head cover is possible.(Refer to page 32.)

Auto switch

Easy connection with external guide. Vertical and lateral mounting is possible. (page 9)

MY3A_3B.qxd 03.5.14 2:47 PM Page 3

Note 2)

Series MY3A/3B

The general selection procedure is described here for the use of the most suitable model of Series MY3A/B that will satisfy the requirements.

Model Selection 1

Standards for Tentative Model Selection

Cylinder modelGraphs for relatedallowable values

M2: RollingM1: Pitching

M3: Yawing

Type Standards for guide selection

MY3A

MY3BGuaranteed accuracy not required, generally combined with a separate guide, stroke accuracy of cylinder body and air cushion required.

Basic short type

Basic standard type

Guaranteed accuracy not required, generally combined with a separate guide, stroke accuracy not required, overall length to be minimized. Refer to

page 4.

Strokepositioning

Cylinderstroke end

Strokeadjusting unit

(option)

Externalshock

absorber

Externalguide

None

None

Yes

None

Yes

–

–

L

H

–

–

Applicableunit

500 800 1000 1500

(mm/s)Maximum operating speed

MY3A

MY3B

MY3B

MY3A

MY3B

MY3A

MY3B

Use of X416, X417 holdermounting brackets

(Holder mounting bracket→ Refer to pages 27 through 28)

Note 1) For operation at a speed exceeding 1000 mm/s, the shock absorber should satisfy the conditions on page 8.Note 2) For operation outside the “Stroke adjusting unit/Fine stroke adjustment range” on page 7.Note 3) The maximum operating speed with the use of the L unit of ø16 is 800 mm/s within the fine stroke adjustment range and 500 mm/s outside the fine stroke adjustment range.Note 4) As the external shock absorber, a unit with appropriate capacity and features should be installed close to the load center of gravity.Note 5) The selection confirmation is extremely important with this series. The selection should be confirmed thoroughly according to the selection flow on page 2.

1

Note 3)

Note 4)

Note 1)

MY3A_3B.qxd 03.5.14 2:47 PM Page 4

2

Model Selection Series MY3A/3B

Selection Flow Chart

When an external guide is used, the selection confirmation of the guide capacity should follow the selection procedure of the external guide.MY3A and MY3B allow direct load application within the allowable range for the built-in guide. The payload in this case will vary depending on the driving speed and the mounting orientation of the cylinder. Please refer to the flow below and confirm the selection. (For more detailed description of the selection flow, please refer to the instruction manual.)

Operating conditionsm: Load weight (kg)V : Speed (mm/s)P : Operating pressure (MPa)

Mounting Orientation:

Tentative selection of cylinder modelMY3A: Basic short typeMY3B: Basic standard type

Applicable NoSelect a guide suitable

for the application.

Selection of cylinderused alone

NG

OK

Examine of cushioningmechanism at stroke end

Strokeadjusting unit

Built-incushion

OK

NG NG

NG

Built-in cushion

OKExternal

cushioningunit

Examine auto switchmounting (model)

Model selected

OK

Reexamine operating conditions

Examine of cushioningmechanism at stroke end

∗ When using an external cushioning unit, we recommend installing a suitable unit near the load's center of gravity.It is possible to select all models of mechanically jointed rodless cylinder (series MY3A, MY3B) according to the procedure indicated above.Refer to the separate instruction manual for further explanation, and consult SMC regarding any questions.

Determinationof load weightand allowable

moment

Changeguide type

∗Please refer to informationby the guide

manufacturer.

MY3A_3B.qxd 03.5.14 2:47 PM Page 5

Dynamic moment M2E does notgenerated.

Series MY3A/3B

3

Types of Moment Applied to Rodless Cylinders

Multiple moments may be generated depending on the mounting orientation, load and position of the center of gravity.

Coordinates and moments

Static moment

Dynamic moment

Horizontal mounting Wall mounting

Vertical mounting

Ceiling mounting

Mounting orientation

Static load m

Horizontal

m1

Ceiling

m2

Wall

m3

Verticalm4

M1

M2

M3

m1 × g × X

m1 × g × Y

—

m2 × g × X

m2 × g × Y

—

—

m3 × g × Z

m3 × g × X

m4 × g × Z

—

m4 × g × Y

MountingorientationDynamicload FE

Horizontal Ceiling Wall Vertical

M1E

M2E

M3E

— × FE × Z

— × FE × Y

13

1.4υa × δ × mn × g

13

Note) m4 is a mass movable by thrust. Use 0.3 to 0.7 times the thrust (differs depending on the operating speed) as a guide for actual use.

Note) Regardless of the mounting orientation, dynamic moment is calculated with the formulae above.

g: Gravitational acceleration

g: Gravitational acceleration, υa: Average speed, δ: Bumper coefficient (Refer to page 22)

M3E

FE

M3

Y

υa

z

y

M3: Yawing

x M2: Rolling

M1: Pitching

m3 × gx

M2

z

M3

XZ

y

m1 × g

M1

Xx

M2

Y

y

m2 × g

M1

Xx

M2

Y

m4 × g

M1

Z

M3

zyY

M1

mn × gM1E

FE

Z

υa

mn×g

Sta

ticm

omen

t

Dyn

amic

mom

ent

Note)

MY3A_3B.qxd 03.5.14 2:47 PM Page 6

4

Mechanically Jointed Rodless Cylinder Series MY3A/3B

Model

MY3AMY3BMY3AMY3BMY3AMY3BMY3AMY3B

Bore size(mm)

16

25

40

63

Maximum allowable moment (Nm)

M1 M2 M3 Maximum load weight (kg)

m1 m2 m3

1.8

6

24

70

0.7

2

10

30

1.5

4

10

20

6

16

40

80

3

6

12

24

0.3

1.2

4.8

19

Maximum Allowable Moment/Maximum Load Weight

The above values are the maximum allowable values for moment and load. Refer to each graph on page 5 regarding the maximum allowable moment and maximum load weight for a particular piston speed.

Moment (Nm)

Prior to the selection calculation, verify the conformity of the operating conditions, such as the use of an external guide (in case of connection with a floating mechanism bracket, for example) or a stroke adjusting unit, with the maximum operating speed. (Refer to page 1.)

Calculation of guide load factor

1. Maximum load weight (1), static moment (2), and dynamic moment (3) (at the time of impact with stopper) must be examined for the selection calculations.∗ To evaluate, use υa (average speed) for (1) and (2), and υ (impact speed υ = 1.4υa) for (3). Calculate m max for (2) from the maximum allowable load graph (m1, m2, m3 ) and Mmax for (2) and (3) from the maximum allowable moment graph (M1, M2, M3).

2. Reference formulas [Dynamic moment at impact] Use the following formulas to calculate dynamic moment when taking stopper impact into consideration.m : Load weight (kg)F : Load (N)FE : Load equivalent to impact (at impact with stopper) (N)υa : Average speed (mm/s)M : Static moment (Nm) υ = 1.4υa (mm/s) FE = 1.4υa × δ × m • g

1ME = — • FE • L1 = 4.57υaδm L1 (Nm)

3Note 4) 1.4υaδ is a dimension less coefficient for calculating impact force.

Note 5) Average load coefficient = :

This coefficient is for averaging the maximum load moment at thetime of stopper impact according to service life calculations.

3. For detailed selection procedure, please refer to pages 9 to 10.

υ : Impact speed (mm/s)L1 : Distance to the load’s center of gravity (m)ME: Dynamic moment (Nm)δ : Bumper coefficient (kg)

With rubber bumper = 4/100With air cushion = 1/100With shock absorber = 1/100

g : Gravitational acceleration (9.8 m/s2)

Σα = + + < 1=Load weight [m]

Maximum load weight[m max]

Static moment [M]Allowable static moment

[Mmax]

Note 1) Moment caused by the load, etc., with cylinder in resting condition.Note 2) Moment caused by the impact load equivalent at the stroke end (at the time of impact with stopper).Note 3) Depending on the shape of the work piece, multiple moments may occur. When this happens, the sum of the

load factors (Σα) is the total of all such moments.

Load weight (kg)

Precautions on design

13

m1

M1=F1 × L1F1

L1

F2

L2

M2=F2 × L2

m2

L3

M3=F3 × L3F3

m3

FE

ME

m

L1

υ

Note 4)

Sum of guideload factors

Note 1)Dynamic moment [ME]

Allowable dynamic moment[MEmax]

Note 2)

Note 5)•

• •

MY3A_3B.qxd 03.5.14 2:47 PM Page 7

Series MY3A/3B

5

MY3B max.MY3A max.

MY3B max.MY3A max.

MY3B max.MY3A max.

MY3B max.MY3A max.

MY3B max.MY3A max.

MY3B max.MY3A max.

MY3A, MY3B/M1

Piston speed mm/s Piston speed mm/s Piston speed mm/s

Mom

ent

Nm

Mom

ent

Nm

Mom

ent

Nm

MY3A, MY3B/m1 MY3A, MY3B/m2 MY3A, MY3B/m3

Piston speed mm/s Piston speed mm/s Piston speed mm/s

Load

wei

ght

kg

Load

wei

ght

kg

Load

wei

ght

kg

ø16

ø25

ø40

ø63

ø16

ø25

ø40

ø63

ø16

ø25

ø40

ø63

ø16

ø25

ø40

ø63

ø16

ø25

ø40

ø63

ø16

ø25

ø40

ø63

15001000500400300200100

100

5040

30

20

0.5

1

10

54

3

2

15001000500400300200100

200 5040

30

20

0.1

1

0.50.4

0.3

0.2

10

54

3

2

100

5040

30

20

0.5

1

10

54

3

2

15001000500400300200100

0.05

504030

20

0.1

1

0.50.4

0.3

0.2

10

54

3

2

15001000500400300200100

0.05

30

20

0.1

1

0.50.40.3

0.2

10

543

2

MY3A, MY3B/M2 MY3A, MY3B/M3

15001000500400300200100

100

5040

30

20

0.1

1

0.50.4

0.3

0.2

10

54

3

2

15001000500400300200100

Maximum allowable momentSelect the moment from within the range of operating limits shown in the graphs. Note that the maximum allowable load value may sometimes be exceeded even within the operating limits shown in the graphs. Therefore, also check the allowable load for the selected conditions.

Select the load from within the range of limits shown in the graphs. Note that the maximum allowable moment value may sometimes be exceeded even within the operating limits shown in the graphs. Therefore, also check the allowable moment for the selected conditions.Maximum allowable load

Maximum Allowable Moment/Maximum Allowable Load

MY3A_3B.qxd 03.5.14 2:47 PM Page 8

Cushion Capacity

Absorption capacity of rubber bumper (MY3A)

Rubber bumper displacement (additional stroke due to pressure on each side)

6

The stop position of the built-in rubber bumper of Series MY3A varies depending on the operating pressure. For alignement at the stroke end, find the guideline for the stroke end position in operation as follows. Find the incremental displacement at the operat-ing pressure in the graph and add it to the stroke end position at no pressurization. If positioning accuracy is required for the stop position at the stroke end, consider installing an external positioning mechanism or switching to the air cushion type (MY3B).

Note) In vertical operation, find the guideline for the stroke end position by adding, in case of the lower end, or subtracting, in case of the upper end, the pressure displacement equivalent to the self weight of the load.


For MY3A16 (Horizontal)

Operating pressure MPa

Add

ition

al s

trok

e m

m

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

00.80.70.60.50.40.30.20.1

(Horizontal)For MY3A40


Add

ition

al s

trok

e m

m

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

00.80.70.60.50.40.30.20.1



Add

ition

al s

trok

e m

m

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

00.80.70.60.50.40.30.20.1



Add

ition

al s

trok

e m

m

2.5

2.0

1.5

1.0

0.5

00.80.70.60.5 0.40.30.20.1

800.40.3

Load weight kg

Impa

ct s

peed

m

m/s

543210.2

1000

500

400

300

200

100

Rubber bumper

m3 maxm2 max m1 max

Horizontal impact: P = 0.5 MPaMY3A16

80

1000

500

400

300

200

100

Rubber bumper

80

Load weight kg

Impa

ct s

peed

m

m/s

2010541 2 3

1000

500

400

300

200

100

m3 maxm2 max m1 max


Load weight kg

Impa

ct s

peed

m

m/s

10 20 30 40 1002 3 4 5

m3 maxm2 max m1 max


Rubber bumper

80

500

400

300

200

100

Load weight kg

Impa

ct s

peed

m

m/s

10 20 30 40541 2 3

1000

m3 maxm2 max m1 max


Rubber bumper

MY3A_3B.qxd 03.5.14 2:47 PM Page 9

7

Calculation of absorbed energy for strokeadjusting unit with built-in shock absorber

Unit: N • m

Absorption Capacity of Air Cushion and Stroke Adjusting Unit (MY3B)

HorizontalVertical

(downward)Vertical

(upward)

Type ofimpact

Kineticenergy E1

Kineticenergy E2

Absorbedenergy E

m •υ2

F • s F•s + m•g•s F•s - m•g•s

E1 + E2

Symbolsυ: Speed of impacting object (m/s)m: Weight of impacting object (kg)F : Cylinder thrust (N)g : Gravitational acceleration (9.8m/s2)s : Shock absorber stroke (m)

υm

s

s

υ m s

υ m

Air cushion stroke Unit: mm

Bore size (mm)

16

25

40

63

Cushion stroke

13

18

25

30

Series MY3A/3B

Note) The maximum operating speed will differ when the stroke adjusting unit is used outside the maximum fine stroke adjustment range (with reference to the fixed stroke end), such as at a fixed intermediate position (X416, X417). (Refer to the graph above.)

Note) The speed of the impacting object is measured at the time of impact with the shock absorber.

Note) With an operating pressure of 0.6 MPa or larger, the use of a cushion or an external shock absorber conforming to the conditions on page 26 is recommended.

Unit: mm

0 to -10

0 to -12

0 to -16

Stroke adjusting unitFine stroke adjustment range

Bore size (mm)

16

25

40

63

Fine stroke adjusting range (mm)

Cushion Capacity

Horizontal impact: P = 0.5 MPaMY3B25

Load weight kg

Impa

ct s

peed

m

m/s

2000

1000

500

400

300

200

100

80 5 10 20 504321

m3 maxm2 max m1 max

H unitAir cushion, L unit


Load weight kg

Impa

ct s

peed

m

m/s

2000

1000

500

400

300

200

100

805 10 20 30 404321

m3 maxm2 max m1 max

H unitAir cusion, L unit


Load weight kg

Impa

ct s

peed

m

m/s

2000

1000

500

400

300

200

100

805 10 20 30 40 100432

m3 maxm2 max m1 max

H unitAir cusion, L unit


Load weight kg

Impa

ct s

peed

m

m/s

2000

1000

500

400

300

200

100

800.3 4 5 10320.4 10.2

m3 maxm2 max m1 max

H unitAir cushion

L unit

12

Maximum collision speed (H, L)with fixed intermediate position



Maximum collision speed (H)with fixed intermediate position

Maximum collision speed(L) with fixed interme-

diate position

(Refer to Note 3 on page 19.)

MY3A_3B.qxd 03.5.14 2:47 PM Page 10

External Shock Absorber Selection

Selection confirmation items with use of external shock absorber

8

Allowable impact force with use of external shock absorber

Cylinder is used alone

When the positioning of the stop position is necessary or the absorption capacity of the built-in cushion is not sufficient, refer to the selection procedure below and consider the installation of an external shock absorber.

Cylinder load factor selection

External shock absorberImpact force and absorption

capacity confirmation

0.40.3 10543210.2

MY316

Col

lisio

n de

cele

ratio

n G

Weight kg

20304050

10

5432

1

240 N

m3 max m1 maxm2 max

50201054321

MY325

Col

lisio

n de

cele

ratio

n G 20

304050

10

5432

1

Weight kg

580 N

m3max m1maxm2max

4030201054321

MY340

20304050

10

5432

1

Col

lisio

n de

cele

ratio

n G

Weight kg

1500 N

m3 maxm1 max

m2 max

Note) The weight represents the equivalent weight including the thrust energy.

403020 100105432

MY363

20304050

10

5432

1

Col

lisio

n de

cele

ratio

n G

Weight kg

3700 N

External guide is used

External guide load factor selection

External shock absorberImpact force and absorption

capacity confirmation

Piston speed with use of external shock absorberBore size (mm) 16 25 40

80 to 1500 mm/s

63

m3 max m1 maxm2 max

MY3A

MY3B


An external shock absorber can be used within the above pis-ton speed range. In conjunction with the absorption capacity selection, however, also confirm the conditions which make the shock absorber collision impact force to stay within the al-lowable range in the graph.Use of an external shock absorber with conditions exceeding the allowable range may damage the cylinder.

To confirm the collision impact force of the shock absorb-er, first find the impact force or acceleration under the operating conditions using the selection information or selection software provided by the manufacturer, and then refer to the graph.(The selection should allow a sufficient margin because the value calculated by the selection software involves an error with reference to the actual value.)

MY3A_3B.qxd 03.5.14 2:47 PM Page 11

9

m1: Mass

m1 max (from of graph MY3A ⁄ m1) = 10.7 (kg) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •

Load factor α1 = m1 ⁄ m1 max = 0.8 ⁄ 10.7 = 0.08

M1: Moment

M1 max (from of graph MY3A ⁄ M1) = 4 (Nm) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •

M1 = m1 × g × X = 0.8 × 9.8 × 5 × 10-3 = 0.04 (Nm)

Load factor α2 = M1 ⁄ M1 max = 0.04 ⁄ 4 = 0.01

M2: Moment

M2 max (from of graph MY3A ⁄ M2) = 0.8 (Nm) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •

M3 = m1 × g × Y = 0.8 × 9.8 × 10 × 10-3 = 0.08 (Nm)

Load factor α3 = M2 ⁄ M2 max = 0.08 ⁄ 0.8 = 0.1

Cylinder • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • MY3A25-500Average operating speed υa • • • • • • • • • • 300 mm/sMounting orientation • • • • • • • • • • • • • • • • • • • • • Horizontal mountingCushion • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Rubber bumper (δ = 4/100)

xy

z

x z

y

x

z yx

y

z

Mounting orientation

1. Horizontalmounting

2. Wall mounting

3. Ceiling mounting 4. Vertical mounting

X

m1

m1

M1

20

10

Z

Y

Y

X

5W

Work pieceno.

0.8 kg

Weight(m)

5 mm

X axis

10 mm

Y axis

Center of gravity

Z axis

20 mm

Work piece weight and center of gravity

m1

M2

Y

Calculation of Guide Load Factor

Series MY3A/3B

The following are steps for selection of the series 3A/B best suited to your application.

Model Selection 2

W: Work piece (0.8 kg)

MY3A25-500

1 Operating conditions

2 Load blocking

3 Calculation of load factor for static load

MY3A_3B.qxd 03.5.14 2:47 PM Page 12

10

Load weight Allowable moment

Equivalent load FE at impact

FE = 1.4υa × δ × m × g = 1.4 × 300 × × 0.8 × 9.8 = 131.7 (N)

M1E: Moment

M1E max (from of graph MY3A ⁄ M1 where 1.4υa = 420 mm/s) = 2.85 (Nm) • • • • • • • • • • • • • • •

M1E = × FE × Z = × 131.7 × 20 × 10-3 = 0.88 (Nm)

Load factor α4 = M1E ⁄ M1E max = 0.88 ⁄ 2.85 = 0.31

M3E: Moment

M3E max (from of graph MY3A ⁄ M3 where 1.4υa = 420 mm/s) = 0.95 (Nm) • • • • • • • • • • • • • • • • • • • • •

M3E = × FE × Y = × 131.7 × 10 × 10-3 = 0.44 (Nm)

Load factor α5 = M3E ⁄ M3E max = 0.44 ⁄ 0.95 = 0.43

The above calculation is within the allowable value, and therefore the selected model can be used. Select a shock absorber separately.In an actual calculation, when the sum of guide load factors Σα in the formula above is more than 1, consider decreasing the speed, increasing the bore size, or changing the product series.

4——100

1——3

1——3

1——3

1——3

M1

M3

Y

FE

FE

Z

M1E

M3E +

Calculation of Guide Load Factor


4 Calculation of load factor for dynamic moment

5 Sum and examination of guide load factors

Σα = α1 + α2 + α3 + α4 + α5 = 0.08 + 0.01 + 0.1 + 0.31 + 0.43 = 0.93 < 1=

Mom

ent

Nm

Mom

ent

Nm

Mom

ent

Nm

MY3A, MY3B/M1MY3A, MY3B/m1 MY3A, MY3B/M2 MY3A, MY3B/M3

Piston speed mm/s Piston speed mm/s Piston speed mm/sPiston speed mm/s

MY3A • 3B16

MY3A • 3B25

MY3A • 3B40

MY3A • 3B63

MY3A • 3B16

MY3A • 3B25

MY3A • 3B40

MY3A • 3B63

MY3A • 3B16

MY3A • 3B25

MY3A • 3B40

MY3A • 3B63

200

100

504030

20

0.5

1

10

543

2

150010005004003002001000.05

504030

20

0.1

1

0.50.40.3

0.2

10

543

2

15001000500400300200100

50

100

4030

20

0.1

1

0.50.40.3

0.2

10

543

2

15001000500400300200100

Load

wei

ght

kg

MY3A • 3B16

MY3A • 3B25

MY3A • 3B40

MY3A • 3B63

0.05

3020

0.1

1

0.50.40.3

0.2

10

543

2

15001000500400300200100

MY3A_3B.qxd 03.5.14 2:47 PM Page 13

11

Series MY3A/3BMechanically Jointed Rodless Cylinder

Basic Type/ø16, ø25, ø40, ø63

16254063

16 mm25 mm40 mm63 mm

Cylinder bore size

StrokeRefer to the standard stroke table on page 2.

A

B

Short style(rubber bumper)

Standard(air cushion)

Type

NilLHLSSLHSSHLHHL

NilSn

2 pcs.1 pc.

“n” pcs.

Number of auto switches

Auto switch typeNil Without auto switch

How to Order

Basic MY3

Port thread type

16 300 LS F9B

Stroke adjusting unit appearance and mounting direction

Stroke adjusting unit (MY3B only)

Symbol

Nil

TNTF

TypeM thread

RcNPT

G

Bore sizeø16

ø25, ø40, ø63

A

Without adjusting unitWith shock absorber for low load at both sidesWith shock absorber for high load at both sides

With shock absorber for low load at left sideWith shock absorber for low load at right sideWith shock absorber for high load at left side

With shock absorber for high load at right sideOne L unit at left side and one H unit at right sideOne H unit at left side and one L unit at right side

∗ Lead wire length symbols: 0.5 m Nil (Example) F9NW3 m L F9NWL5 m Z F9NWZ

Notes) ∗ Solid state switches marked with a “” symbol are produced upon receipt of order. ∗ In addition to the models in the above table, there are some other auto switches

that are applicable. For more information, please refer to page 20.


Installation exampleHL

Left

Right L unit

H unit

Port

Port

Applicable Auto Switch/Refer to pages 13 through 15 for detailed auto switch specifications.

Sol

id s

tate

sw

itch

Typ

e

Indi

cato

rlig

ht

Ree

dsw

itch

Load voltage

DC AC

Auto switch modelElectrical entry

Perpendicular In-line

Lead wire length (m)∗0.5(Nil)

3(L)

5(Z)

ICcircuit

ICcircuit

ICcircuit

Relay,PLC

Relay, PLC

A96

A93

M9N

M9P

M9B

F9NW

F9PW

F9BW

A96V

A93V

F9NV

F9PV

F9BV

F9NWV

F9PWV

F9BWV

100 V12 V

5 V

5 V12 V

12 V

5 V12 V

12 V

24 V

24 V2-wire

3-wire(NPN equiv.)Yes

YesGrommet

Electricalentry

Wiring(output)

Prewireconnector

Applicableload

Specialfunction

3-wire (NPN)

3-wire (PNP)

2-wire

3-wire (NPN)

3-wire (PNP)

2-wire

Diagnosticindication

2-colorindicator

Grommet

∗ Refer to the table below for auto switch model numbers.

∗ Auto switches are packed together when shipped (unassembled).

In case of MY3B

MY3A_3B.qxd 03.5.14 2:47 PM Page 14

12

Specifications Bore size (mm)

Fluid

Action

Operating pressure range

Proof pressure

Ambient and fluid temperature

Cushion

Lubricaton

Stroke length tolerance

Port size (Rc, NPT, G)

16 25 40

Air

Double acting

0.15 to 0.8 MPa

1.2 MPa

5 to 60°C

Rubber bumper (MY3A) / Air cushion (MY3B)

Non-lube

M5 × 0.8 1/8

Stroke Adjusting Unit SpecificationsBore size (mm)

Unit symbol

Shock absorber model

Fine stroke adjusting range (mm)

16 25 40 63

MY3B

L

RB0806

H

RB1007

L

RB1007

H

RB1412

L

RB1412

H

RB2015

L

RB2015

H

RB2725

Weight

Bore size (mm) Model

16

25

40

63

16

25

40

63

0.22

0.65

2.45

7.14

0.23

0.75

2.58

7.87

0.06

0.17

0.25

0.56

0.06

0.17

0.25

0.56

Basic weight

Additional weight

per 50 mm of stroke

Stroke adjusting unit weight(per unit)

Weight ofL unit

Weight ofH unit

0.04

0.10

0.26

0.57

0.05

0.15

0.30

0.92

Symbol

1/4

63

3/8

Calculation method/Example: MY3B25-300LBasic weight 0.75 kg

Additional weight 0.17/50 st

Weight of L unit 0.1 kg

Cylinder stroke 300 st0.75 + 0.17 × 300 ÷ 50 + 0.1 × 2 1.97 kg

Unit: kg

Made to Order specificationsMade to

Order

Refer to pages 27 through 28 regarding made to order specifications for series MY3A/B.

Shock Absorber Specifications

Model

Max. energy absorption (J)

Stroke absorption (mm)

Max. impact speed (mm/s)Max. operating frequency (cycles/min)

Springforce (N)

Operating temperature range (°C)

Extended

Compressed

RB2015

RB2725

RB0806

RB1007

RB1412

29.8

15

25

8.34

20.50

46.6

25

10

8.83

20.01

0.84

6

80

1.96

4.22

2.4

7

70

4.22

6.86

10.1

12

1000

45

6.86

15.98

5 to 60

MY3A

MY3B

Piston Speed Bore size (mm)

Without stroke adjusting unit (MY3A)

Without stroke adjusting unit (MY3B)

16 25 40

80 to 500 mm/s

80 to 1000 mm/s80 to 1000 mm/s

80 to 1500 mm/s

63

Stroke adjusting unit (L and H unit/MY3B)

∗ External shock absorber (low reaction type)

∗ Refer to “External Shock Absorber Selection” on page 8.When Series RB is used, operate at a piston speed that will not exceed the absorption capacity of the air cushion and stroke adjusting unit.

Bore size(mm)

16, 2540, 63

Standard stroke (mm)∗

100, 200, 300, 400, 500, 600700, 800, 900, 1000, 12001400, 1600, 1800, 2000

3000

Max. manufacturablestroke (mm)

Standard Stroke

∗ Strokes are manufacturable in 1mm increments, up to the maximum stroke. However, when exceeding a 2000 mm stroke, specify “-XB11” at the end of the model number. Refer to the made to order specifications on page 27.

Theoretical Output Unit: N

16

25

40

63

0.2 0.3 0.4 0.5 0.6 0.7 0.8

40

98

251

623

60

147

377

934

80

196

502

1246

100

245

628

1557

120

294

754

1869

140

343

879

2180

160

392

1005

2492

Operating pressure (MPa)Boresize(mm)

Pistonarea

(mm2)

200

490

1256

3115

Note) Theoretical output (N) = Pressure (MPa) × Piston area (mm2)

Note) The tolerance of MY3A is a value with no pressurization. When a rubber bumper is used, the stroke of MY3A varies according to the operating pressure.To find the stroke length tolerance at each operating pressure, double the addi-tional stroke due to pressure on each side (page 6) and add it.

0 to –10 0 to –12 0 to –16 0 to –16

(ø16L unit: 80 to 800 mm/s)


1000 mm or less , Note)1001 mm to +1.8 0

+2.8 0

L unit

H unit

LeftRightLeft

Right

MY3B

16 25

MY3B-A16L1MY3B-A16L2MY3B-A16H1MY3B-A16H2




40 63

Stroke Adjusting Unit ModelOption

Bore size(mm)UnitModel

MY3B

MY3A

MY3A_3B.qxd 03.5.14 2:47 PM Page 15

MY3A16-16A- Stroke

MY3A16-16B- Stroke

RMA-16RMY-16

MYA16-15-R6656

ø6.2 × ø3 × ø1.6

MY3A25-16A- Stroke

MY3A25-16B- Stroke

RMA-25RMY-25

MYA25-15-R6657

C-5

MY3A40-16A- Stroke

MY3A40-16B- Stroke

RMA-40RMY-40

MYA40-15-R6658

ø10.5 × ø8.5 × ø1

MY3A63-16A- Stroke

MY3A63-16B- Stroke

RMA-63RMY-63

MYA63-15-R6659

C-14

13

Series MY3A/3B

Construction

MY3A

Seal ListNo. No.

Seal belt

Dust seal band

Gasket bumperPiston seal

Scraper

O-ring

No.Specialresin

Stainlesssteel

NBRNBR

Specialresin

NBR

No.

No.12131417192021222425

DescriptionSpring pinSeal ringBearingInner wiperHexagon socket head cap screwHexagon socket head cap screwHexagon socket head set screwHexagon socket head taper plugMagnetSeal magnet

MaterialCarbon tool steel

BrassSpecial resinSpecial resin

Chrome molybdenum steelChrome molybdenum steelChrome molybdenum steel

Carbon steelRare earth magnet

Rubber magnet

Parts ListNo.1234567811

DescriptionCylinder tubeHead coverSlide tablePiston yokePistonWear ringBelt separatorBelt clampStopper

MaterialAluminum alloyAluminum alloyAluminum alloyStainless steelAluminum alloySpecial resinSpecial resinSpecial resinCarbon steel

NoteHard anodizedHard anodized

Electroless nickel plated

Chromated

Nickel plated

Parts ListNote

Black zinc chromated

Nickel platedNickel platedNickel platedNickel plated

MY3A16 MY3A25 MY3A40 MY3A63

9

10

1516

18

23

1

1

2

2

1

4

w e tui @1 !3!5 !6!7!8

q

r

y

!0!4 !9

@0

@2

!1

@4 @3!2

@5 o

MY3A_3B.qxd 03.5.14 2:47 PM Page 16

14

Construction

MY3B


MY3B16-16A- Stroke

MY3B16-16B- Stroke

RMB-16RMY-16

MYA16-15-R6656

ø6.2 × ø3 × ø1.6ø4 × ø1.8 × ø1.1

MCS-3

MY3B25-16A- Stroke

MY3B25-16B- Stroke

RMB-25RMY-25

MYA25-15-R6657

C-5ø4 × ø1.8 × ø1.1

MCS-5

MY3B40-16A- Stroke

MY3B40-16B- Stroke

RMB-40RMY-40

MYA40-15-R6658

ø10.5 × ø8.5 × ø1ø7.15 × ø3.75 × ø1.7

RCS-8

MY3B63-16A- Stroke

MY3B63-16B- Stroke

RMB-63RMY-63

MYA63-15-R6659

C-14ø8.3 × ø4.5 × ø1.9

RCS-12

Seal ListNo. No.

Seal belt

Dust seal band

Tube gasketPiston seal

Scraper

O-ringO-ringCushion seal

No.Specialresin

Stainlesssteel

NBRNBR

Specialresin

NBRNBRNBR

No.

No.1314171920212224252627

DescriptionCushion bossBearingInner wiperHexagon socket head cap screwHexagon socket head cap screwHexagon socket head set screwHexagon socket head taper plugMagnetSeal magnetCushion ringCushion needle

MaterialAluminum alloySpecial resinSpecial resin

Chrome molybdenum steelChrome molybdenum steelChrome molybdenum steel

Carbon steelRare earth magnet

Rubber magnetBrass

Rolled steel

Parts ListNo.123456781112

DescriptionCylinder tubeHead coverSlide tablePiston yokePistonWear ringBelt separatorBelt clampStopperSpring pin

MaterialAluminum alloyAluminum alloyAluminum alloyStainless steelAluminum alloySpecial resinSpecial resinSpecial resinCarbon steel

Carbon tool steel

NoteHard anodizedHard anodized

Electroless nickel plated

Chromated

Nickel platedBlack zinc chromated

Parts ListNote

Chromated

Nickel platedNickel platedNickel platedNickel plated

Nickel plated

MY3B16 MY3B25 MY3B40 MY3B63

9

10

1516

18

232829

1

1

2

2

1

422

w e tui @1 @6 @9 !3!5 !6!7!8

q

r

y

!0 @8 @7!4 !9

@0

@2

!1

@4!2 @3

@5 o

MY3A_3B.qxd 03.5.14 2:47 PM Page 17

15

Series MY3A/3B

Short Type /ø16, ø25, ø40, ø63MY3A Bore size Stroke

PA

NG

GG

NG

(LL) L

PB

PD

YW

NW

QW

Q + StrokePG

HN

H

LW

UUTTHG

PC

NE

NG

C

Z + Stroke

NG

A

(Hexagon sockethead taper plug)

2-P

øLD through hole4-øB depth4-MM depth M


2 × 2-P

2-P2-T counter bore depth E

(2-JJ counter bore, thread depth from bottom KK)Floating bracket mounting thread

ModelMY3A16MY3A25MY3A40MY3A63

A B C E G H HG JJ KK L LD LL LW M

55 06.0 18 2 09.5 27 05.0 M4 × 0.7 05.0 065 03.5 22.5 041 06

75 09.5 25 2 14.0 37 07.4 M5 × 0.8 07.5 095 05.5 27.5 061 08

120 14.0 38 2 18.0 54 12.0 M6 × 1 12.0 160 08.6 40.0 090 12

160 17.0 60 3 20.5 84 16.5 M8 × 1.25 22.0 220 11.0 50.0 134 16

MM

M4 × 0.7

M5 × 0.8

M6 × 1M8 × 1.25

ModelMY3A16MY3A25MY3A40MY3A63

22.5

32.0

46.0

70.0

8

10

15

29

17.2

24.0

37.0

58.0

43

65

94

139

44

64

112

162

26

40

60

84

32.5

47.5

80.0

110.0

4.0

6.0

7.5

10.0

102

138

223

300

19

30

40

64

7

10

14

16

6.5

9.0

14.0

20.0

30

47

66

99

42

62

92

136

110

150

240

320

NE NG NH NW PA PB PC PD4.0

6.0

8.5

10.0

PG Q QW T TT UU YW ZPM5 × 0.8

Rc, NPT, G1/8Rc, NPT, G1/4Rc, NPT, G3/8

13.5

20.0

27.0

31.0

N

(mm)

MY3A_3B.qxd 03.5.14 2:47 PM Page 18

16


Standard Type /ø16, ø25, ø40, ø63MY3B Bore size Stroke

ModelMY3B16MY3B25MY3B40MY3B63

A

ModelMY3B16MY3B25MY3B40MY3B63

(mm)

61

89

138

178

22.5

32.0

46.0

70.0

8

10

15

29

17.2

24.0

37.0

58.0

43

65

94

139

44

64

112

162

26

40

60

84

32.5

47.5

80.0

110.0

4.0

6.0

7.5

10.0

114

166

259

336

19

30

40

64

7

10

14

16

6.5

9.0

14.0

20.0

30

47

66

99

42

62

92

136

122

178

276

356

B C E G

NE NG NH NW PA PB PC PD9.7

14.5

19.5

23.5

PE8.5

12.2

16.5

27.5

PF Q QW T TT UU YW ZP

H HG JJ KK L LD LL LW M MM6.0

9.5

14.0

17.0

18

25

38

60

2

2

2

3

9.5

14.0

18.0

20.5

27

37

54

84

5.0

7.4

12.0

16.5

5.0

7.5

12.0

22.0

65

95

160

220

3.5

5.5

8.6

11.0

28.5

41.5

58.0

68.0

41

61

90

134

PG4.0

6.0

8.5

10.0

6

8

12

16

M4 × 0.7

M5 × 0.8

M6 × 1M8 × 1.25

M5 × 0.8

Rc,NPT,G1/8Rc,NPT,G1/4Rc,NPT,G3/8

M4 × 0.7

M5 × 0.8

M6 × 1M8 × 1.25

13.5

20.0

27.0

31.0

N

NG

NG

GG

PF

PE

PB

(LL) L

PA

PG Q + Stroke

YW

NW

QW

H

NHH

G

TT UU

LW

NE

NG

PD

PC

C

Z + Stroke

N

G

A


2-P

Cushion needle

øLD through hole4-øB depth

4-MM depth M


2 × 2-P

2-P

(2-JJ counter bore, thread depth from bottom KK)Floating bracket mounting thread

2-øT counterbore depth E

MY3A_3B.qxd 03.5.14 2:47 PM Page 19

Series MY3A/3B

17

E14.1

20.1

30.1

36.1

EC21.5

29.8

45.0

70.5

FC034.5

051.5

072.5

108.0

EY

26.5

36.5

53.5

83.5

h2.4

3.6

5.0

6.0

S40.8

46.7

67.3

73.2

SD25.8

25.2

36.3

36.2

T06

07

12

15

TT0.9

1.4

0.9

0.9

Shock absorber modelRB0806

RB1007

RB1412

RB2015

TU25.0

28.5

39.0

43.0

W062

090

128

178

Applicable cylinderMY3B16MY3B25MY3B40MY3B63

E14.1

20.1

30.1

36.1

EC23.0

31.8

48.0

74.5

FC034.5

052.2

073.5

108.0

EY

29.5

41.0

60.5

91.0

h2.4

3.6

5.0

6.0

S46.7

67.3

73.2

99.0

SD31.7

45.8

42.2

62

T07

12

15

25

TT0.9

1.4

0.9

0.9

Shock absorber modelRB1007

RB1412

RB2015

RB2725

TU25.0

28.5

39.0

43.0

W062

090

128

178

Applicable cylinderMY3B16MY3B25MY3B40MY3B63

Shock absorber for low load + Adjusting bolt

MY3B Bore size Stroke L

Shock absorber for high load + Adjusting bolt

MY3B Bore size Stroke H

Stroke Adjusting Unit

EY

EC

W FC

hTT

(Shock absorber stroke) T S

SDE


EY

EC

S(Shock absorber stroke) T

SDE

hTT

FCW


TU

TU

Standard Type /ø16, ø25, ø40, ø63

(mm)

(mm)

MY3A_3B.qxd 03.5.14 2:47 PM Page 20

18

Side Support

Guide for Using Side Supports

For long stroke operation, the cylinder tube may be deflected depending on its own weight and the load weight. In such a case, use a side support in the middle section. The spacing (l ) of the support must be no more than the values shown in the graph on the right.

q If the cylinder mounting surfaces are not measured accurately, using a side support may cause poor operation. Therefore, be sure to level the cylinder tube when mounting. Also, for long stroke operation involving vibration and impact, use of a side support is recommended even if the spacing value is within the allowable limits shown in the graph.

w Support brackets are not for mounting; use them solely for providing support.

Side support AMY-SA

Side support BMY-SB

Caution

m

m

m

Model Applicable cylinderMY3A16 • MY3B16MY3A25 • MY3B25MY3A40 • MY3B40MY3A63 • MY3B63

A 5377

112160

63.6091 130182

C15354555

D26506480

E 4.9

8 11.714.8

F3 5 6

8.5

G 6.5 9.511 14

H 3.4 5.5 6.6

9

JM4 × 0.7M6 × 1M8 × 1.25M10 × 1.5

MY-S16MY-S25MY-S32MY-S40

ABABABAB

B

Guide for using MY3B side supportGuide for using MY3A side support

Support spacing l1 (mm)

MY3A16

MY3A25

MY

3A40

MY

3A63

(1000)

(1100)

(1400)

(1900)

Note) A side support must be used to keep the spacing from exceeding the value inside the parentheses.

Support spacing l1 (mm)Note) A side support must be used to keep

the spacing from exceeding the value inside the parentheses.

Wei

ght w

(kg

)

0

100

90

80

70

60

50

40

30

20

10

40003000200010000

MY3B16

MY3B25

MY

3B40

MY

3B63

(900)

(1000)

(1300)

(1800)

0

Wei

ght w

(kg

)

100

90

80

70

60

50

40

30

20

10

40003000200010000

E

BAC

D

DC

BA

2-øH

E

F

2-øG

2-J


l

l

l l

(mm)

MY3A_3B.qxd 03.5.14 2:47 PM Page 21

Series MY3A/3B

19

Floating Bracket

Facilitates connection to other guide systems.

Applications

Mounting example

Applications

Mounting example

MYAJ16MYAJ25MYAJ40MYAJ63

MY316MY325MY340MY363

385572

100

20223240

M4 × 0.7M6 ×1M8 ×1.25M10 ×1.5

4.55.56.59.0

10121619

6.09.5

11.014.0

Installation of holding bolts

Model

MYAJ16Tighting torque

Tighting torque for holding bolts

MYAJ635

13

Model

MYAJ40Tighting torqueUnit: N • m

Slider(piston yoke)

Pin Conical springwasher

Holding bolt

MYAJ251.53

Guide

Mounting orientation w (to minimize the installation height)Work

BracketFloating mechanism

Series MY3A

Mounting orientation q (to minimize the installation width)Work

BracketFloating mechanism

Series MY3AGuideE

aE

a

H Q1

F1

B1

C1

GD1 Za1

Ea

Ea

P Q2

F2

B2

C2

GD2 Za2

Detaildrawing of Za2

(adjustablerange)

Detaildrawing of Za1

(adjustablerange)

Eb

Eb

2 × 2-øLD

A1

PK1

(scr

ew le

ngth

)L

(C

ount

erbo

re

dep

th)

Zb1JJ

Detaildrawing of Zb1

(adjustablerange)

Eb

Eb

2 × 2-øLDH

L (

Cou

nter

bore

d

epth

)K

2 (s

crew

leng

th)

A2

Zb2JJ

Detaildrawing of Zb2

(adjustablerange)

ApplicablecylinderModel

Common

JJ L P LDHG



29.038.556.086

6890

130186

34456593

18243250

88112162226

5.56.59.5

10.0


Mounting direction q

C1 D1 F1 K1

10111620

Q1B1A1



364668

100

5880

114166

29405783

30405580

6892

130185

10141923

5689.5

1111

1111


Mounting direction w

Adjusting range

C2 D2 F2 K2 Q2

Ea Eb

B2A2

MY3 floating bracket mounting dimensions (mm)

MY3A_3B.qxd 03.5.14 2:47 PM Page 22

BMY3-016

20

Auto Switches Proper Mounting Positionfor Stroke End Detection

Auto Switch Mounting

088.5

121.7

197.5

266.5

22.0

29.3

42.5

53.5

06.5

10.5

15

14

A B Operating rangeBore size

16254063

D-A9, D-A9V (mm)

084.5

117.7

193.5

262.5

26.5

33.3

46.5

57.5

3.0

4.5

6.3

6.6


16254063

D-F9W, D-F9(W)V (mm)

094.5

135.7

215.5

284.5

28.5

43.3

60.5

71.5

06.5

10.5

15

14


16254063

D-A9, D-A9V (mm)

090.5

131

211.5

280.5

32.5

47.3

64.5

75.5


16254063

D-F9W, D-F9(W)V (mm)

3.0

4.5

6.3

6.6

084.5

117.7

193.5

262.5

2

3

4

4.5

2

3

4

4.5

B Operating rangeBore size

16254063

D-M9 (mm)

090.5

131

211.5

280.5

B Operating rangeBore size

16254063

D-M9 (mm)

MY3A

MY3B

AccessoriesFlat head watchmakers screw driver

(M2.5 × 41)Switch mounting screw

Switch spacer(BMY3-016)

A B

When mounting an auto switch, first hold the switch spacer with your fingers and push it into the groove. Confirm that it is aligned evenly within the groove and adjust the position if necessary (see below). Then, insert the auto switch into the groove and slide it into the spacer (refer to the drawing at right).After deciding on the mounting position within the groove, slip in the mounting screw, which is included, and tighten it, using a flathead watchmakers screw driver.

Note) Use a watchmakers screw driver with a handle diameter of 5 to 6 mm to fasten the auto switch mounting screws.The tightening torque should be approximately 0.05 to 0.1 N•m.The guideline is a 90° rota-tion after the fastening is felt.

16 25 40 63Applicable bore size (mm)

Switch spacer

Switch spacer (mm)

Besides the models listed in “How to Order”, the following auto switches are applicable.Refer to page 23 for details.

The normally closed type (NC=b contact) solid state switches (D-F9G, F9H) are also available. For detailed information, please consult SMC.

Auto switch type Part no. Features

Withoutindicator light

Lead wire electricalentry

D-A90Reed switch

Grommet (in-line)D-A90V Grommet (vertical)

26.5

33.3

46.5

57.5

A

32.5

47.3

64.5

75.5

A


Note) The operating ranges are provided as guidelines including the hystere-sis and are not guaranteed values (with approx. ±30% variations). They may vary significantly with the surrounding environment.

MY3A_3B.qxd 03.5.14 2:47 PM Page 23

21

Auto Switch SpecificationsSeries MY3A/3B

Auto Switch Specifications

TypeLeakage current

Operating time

Impact resistance

Insulation resistance

Withstand voltage

Ambient temperature

Enclosure

Reed auto switch

None

1.2 ms

300 m/s2

50 MΩ or more at 500 VDC (between lead wire and case)

–10 to 60°CIEC529 standard IP67, watertight (JISC0920)

Solid state switch

2-wire: 100 µA or less, 2-wire: 0.8 mA or less

1 ms or less

1000 m/s2

1500 VAC for 1 min.(between lead wire and case)

1000 VAC for 1 min.(between lead wire and case)

Lead Wire Length

Lead wire length indication

(Example)

0.5 m3 mL5 mZ

Note 1) Lead wire length Z: 5 m applicable auto switchesSolid state switch: All types are produced upon receipt of order.

Note 2) For solid state switches with flexible wire specification, add “–61” at the end of the lead wire length.

NilLead wire length

LD-F9P

Flexible specification

D-F9PL- 61

Contact Protection Box/CD-P11, CD-P12

<Applicable switch type>

Contact Protection Box Specifications

Contact protection box internal circuits

Contact protection box dimensions

Contact Protection Box/Connection

∗ Lead wire length Switch connection side: 0.5 m Load connection side: 0.5 m

D-A9 and D-A9V type switches do not have internal contact protection circuits.q The operated load is an induction load.w The length of wiring to the load is 5 m or more.e The load voltage is 100 VAC and 200 VAC.

A contact protection box should be used in any of the above situations.

Part No. CD-P11

CD-P11

100 VAC

25 mA

200 VAC

12.5 mA

CD-P12

24 VDC

50 mA

CD-P12

Surge absorberChokecoil

OUT Brown [Red]

OUT Blue [Black]

OUT (+)Brown [Red]

OUT (-)Blue [Black]

Choke coil

Zener diode

(Example)

Load voltage

Max. load current

To connect a switch unit to a contact protection box, connect the lead wire from the side of the contact protection box marked SWITCH to the lead wire coming out of the switch unit. The switch unit should be kept as close as possible to the contact protection box with a lead wire that is no more than 1 meter in length.

MY3A_3B.qxd 03.5.14 2:47 PM Page 24

22

Basic Wiring

Solid state 3-wire, NPN

• Sink input specifications3-wire, NPN

3-wire (using relays)

2-wire(Solid state)

• Source input specifications3-wire, NPN

OR connection for NPN output

2-wire with 2-switch AND connection 2-wire with 2-switch OR connection

2-wire 2-wire

Solid state 3-wire, NPN

Load voltage at ON = Power supply voltage – Internal voltage drop × 2 pcs.

= 24 V–4 V × 2 pcs.= 16 V

Example: Power supply is 24 VDCInternal voltage drop in switch is 4 V.

Load voltage at OFF = Leakage current × 2 pcs. × Load impedance

= 1 mA × 2 × 3 kΩ= 6 V

Example: Load impedance is 3 kΩ.Leakage current from switch is 1 mA.

(Power supplies for switch and load are separate)

Switch 1

Switch 2

LoadSwitch 1

Brown [Red]

Switch 2

Black[White]

Blue [Black]

Black[White]

Blue [Black]

Blue [Black]

Blue [Black]

Relay

Relay

Brown [Red]

Load

Relaycontact

Switch 1

Switch 2

Brown[Red]

Blue[Black]

Brown[Red]

Blue [Black]

LoadSwitch 1

Switch 2

Brown[Red]

Blue [Black]

Brown [Red]

Blue [Black]

Load

Switchmaincircuit

Brown [Red]

Black [White]

Blue [Black]

Load

Switchmaincircuit

Brown

Black [White]

Blue [Black]

Load

Switchmaincircuit

Brown [Red]

Black [White]

Blue [Black]

Load

Switchmaincircuit

Brown [Red]

Blue [Black]

Load

Switchmaincircuit

Brown [Red]

Blue [Black]Load

Switch

InputBlack [White]

COM

Brown [Red]

Blue [Black]

Switch

Input

Blue[Black]

COM

Brown [Red]

Switch

InputBlack [White]

PLC internal circuitCOM

Brown [Red]

Blue [Black]

PLC internal circuit



Switch

InputBlue [Black]

COMBrown [Red]

Connection Examples for AND (Series) and OR (Parallel)

Examples of Connection to PLC (Programable Logic Controller)

2-wire(Reed switch)

Indicatorlightprotectivecircuit,etc.

Brown [Red]

Blue [Black]

Load

Brown [Red]

Blue [Black]Load

Switch 1

Brown [Red]

Switch 2

Black [White]

Load

Brown [Red]

Black [White]

Blue [Black]

Blue [Black]

Brown [Red]

Black [White]

Brown [Red]

Black [White]

AND connection for NPN output(performed with switches only)

AND connection for NPN output(using relays)

The indicator light illuminates when the two switches are in the ON state.

< Solid State> < Reed Switch>When two switches are connected in series, a load may malfunction because the load vol-tage will decline when in the ON state. The indi-cator lights will light when both switches are in the ON state.

When two switches are connected in par-allel, malfunction may occur because the load voltage will in-crease when in the OFF state.

Because there is no current leakage, the load voltage will not in-crease when turned OFF However, depend-ing on the number of switches in the ON state, the indicator lights may sometimes grow dim or not light up be-cause of the dispersion and reduction of the current flowing to the switches.

Auto Switch Connections and Examples

Indicatorlightprotectivecircuit,etc.

Connect according to the applicable PLC input specifications, as the connection method will vary depending on the PLC input specifications.

MY3A_3B.qxd 03.5.14 2:47 PM Page 25

The dimension inside ( ) is for D-A93.D-A90V, D-A93V, D-A96V

Reed Switches: Direct Mounting TypeD-A90(V), D-A93(V), D-A96(V)

GrommetElectrical entry: In-line

PLC: Programable Logic Controller

D-A90, D-A90V (Without indicator light)

D-A93, D-A93V, D-A96, D-A96V (With indicator light)

Lead wiresOilproof vinyl heavy insulation cable, ø2.7, 0.5 mD-A90(V), D-A93(V) 0.18 mm2 × 2 cores (Brown, Blue [Red, Black]) D-A96(V) 0.15 mm2 × 3 cores (Brown, Black, Blue [Red, White, Black])

Note 1) Refer to page 21 for auto switch common specifications.Note 2) Refer to page 21 for lead wire lengths.

D-A90, D-A90V

IC circuit, Relay, PLC

24 V or less

50 mA

None

1 Ω or less (including lead wire length of 3 m)

48 V or less

40 mA

100 V or less

20 mA

D-A93, D-A93V

Relay, PLC

24 VDC

5 to 40 mA

NoneD-A93 — 2.4 V or less (to 20 mA)/

3 V or less (to 40 mA) D-A93V — 2.7 V or less

Red LED lights up when ON

100 VAC

5 to 20 mA

D-A96, D-A96V

IC

4 to 8 VDC

20 mA

0.8 V or less

ACDC

ACDC

ACDC

Note) 1. In the case operation load is an inductive load.

2. In the case the wiring length to load is more than 5 m.

3. In the case the load voltage is 100 VAC.A contact protection box should be used if any of the above conditions is applicable. (For detailed in-formation about the contact protection box, please refer to page 21.)

q Do not use anything other than the mounting screws attached to the auto switch body to secure the switch. If screws other than those specified are used, it may cause the switch to be dam-aged.

Operating Precautions Caution

Model D-A90

6

30

D-A90V

6

30

D-A93

6

30

D-A93V

6

30

D-A96

8

41

D-A96V

8

41

Unit: g

Auto Switch Weight

Auto switch internal circuits

D-A90(V)

D-A93(V)

D-A96(V)

Contactprotectionbox

CD-P11CD-P12

OUT (±)Brown [Red]

OUT (±)Blue [Black]

Blue [Black]

LED

Resistor

Zenerdiode

Brown [Red] (+)

Contactprotectionbox

CD-P11CD-P12

OUT (+)Brown[Red]

OUT (-)Blue[Black]

LED

Resistor

Reversecurrentpreventiondiode

OUTBlack [White]

DC (+)Brown [Red]

DC (-)Blue [Black]

(+)

(-)

Auto Switch DimensionsD-A90, D-A93, D-A96

23

Auto Switch Specification

Ree

d sw

itch

Lead

sw

itch

Load

Auto switch part no.

Applicable load

Load voltage

Maximum load current

Contact protection circuit

Internal resistance


Applicable load

Load voltage

Contact protection circuit

Indicator light

Load current range and max. load current

Internal voltage drop

M2.5 × 4 lSlotted set screw

M2.5 × 4 l Slotted set screw

Indicator lightType D-A90 without indicator light

Indicator light

Type D-A90V without indicator light

Most sensitive position10


22(24.5)

222 6

ø2.7

9.1

5.1

4.5

ø4

ø4

4.5

ø2.

7

22.8

Ree

d sw

itch

Ree

d sw

itch

0.5

3

Lead wire length(m)

MY3A_3B.qxd 03.5.14 2:47 PM Page 26

24

Solid State Switches: Direct Mounting TypeSeries D-M9N, D-M9P, D-M9B



Auto Switch Weight

Auto Switch Dimensions

Model

0.5

3

D-M9N

8

41

D-M9P

8

41

D-M9B

7

38

Unit: g

Lead wire length(m)



Wiring type

Output type

Applicable load

Power supply voltage

Current consumption

Load voltage

Load current


Leakage current

Indicator light

D-M9N D-M9B2-wire

—

24 VDC Relay, PLC

—

—

24 VDC (10 to 28 VDC)

2.5 to 40 mA

4 V or less

0.8 mA or less

D-M9P

D-M9Mounting screw M2.5 × 4 lSlotted set screw

Indicator light

3-wire


5, 12, 24 VDC (4.5 to 28 VDC)

10 mA or less

40 mA or less

0.8 V or less

100 µA or less at 24 VDC

NPN PNP


28 VDC —

2.7

22

22

22

2.6

4 2.8

D-M9B, N, P

3.2

6

D-M9N, P (3-wire)

Most sensitive position

3.2

6

D-M9B (2-wire)


D-M9 (With indicator light)

Lead wiresOilproof vinyl heavy insulation cable, ø2.7, 0.5 mD-M9B 0.15 mm2 × 2 coresD-M9N, D-M9P 0.15 mm2 × 3 cores


Auto switch internal circuitsD-M9N

D-M9B

D-M9P

Grommet 2-wire load current is reduced (2.5 to 40 mA). Lead-free Use of lead wire compliant with UL

standards (style 2844) 1.5 times the flexibility compared with

conventional products (comparison with other SMC products)

Conventional

D-M9

Sw

itch

mai

n ci

rcui

tS

witc

hm

ain

circ

uit

Sw

itch

mai

n ci

rcui

t

DC (+)Brown [Red]

OUTBlack [White]

DC (-)Blue [Black]

DC (+)Brown [Red]

OUTBlack [White]

DC (-)Blue [Black]

OUT (+)Brown [Red]

OUT (-)Blue [Black]

When the cable sheath is stripped, confirm the stripping direction.The insulator may be split or damaged depending on the direction.

MY3A_3B.qxd 03.5.14 2:47 PM Page 27

25


D-F9NV

D-F9BV

D-F9PV


Auto Switch Weight


Model

0.5

3

5

D-F9NV 7

37

61

D-F9PV 7

37

61

D-F9BV 6

31

51

Unit: g

Solid State Switches: Direct Mount TypeD-F9NV, D-F9PV, D-F9BV

Lead wire length(m)

Grommet


Do not use anything other than the mount-ing screws attached to the auto switch body to secure the switch. If screws other than those specified are used, it may cause the switch to be damaged.


D-F9, D-F9V (With indicator light)Auto switch part no.

Electrical entry direction

Wiring type

Output type

Applicable load


Current consumption

Load voltage

Load current


Leakage current

Indicator light

NPN

28 VDC or less

40 mA or less

D-F9NV

Perpendicular

D-F9BV

Perpendicular

D-F9PV

Perpendicular

2-wire

—

24 VDC relay, PLC

—

—

24 VDC (10 to 28 VDC)

5 to 40 mA

4 V or less

0.8 mA or less

PNP

—

80 mA or less

Lead wiresOilproof vinyl heavy insulation cable, ø2.7, 0.5 m0.15 mm2 × 3 cores (Brown, Black, Blue [Red, White, Black]) 0.18 mm2 × 2 cores (Brown, Blue [Red, Black])


1.5 V or less(0.8 V or less at

10 mA load current)


OUTBlack[White]

DC (+)Brown[Red]

DC (-)Blue[Black]

Switc

hm

ain

circu

it

DC (+)Brown[Red]

DC (-)Blue[Black]

OUTBlack[White]

OUT (+)Brown[Red]

OUT (-)Blue[Black]

D-F9V

4

2

3.8

3.1

6

4.3

20

6.2

4.6

2.8ø2.7

Slotted set screw

Indicator light


0.8 V or less


5, 12, 24 VDC (4.5 to 28 VDC)

10 mA or less


3-wire

Mounting screw M2.5 × 4 l

Switc

hm

ain

circu

itSw

itch

mai

n cir

cuit

MY3A_3B.qxd 03.5.14 2:47 PM Page 28

26


D-F9NW, F9NWV

D-F9BW, F9BWV

D-F9PW, F9PWV



Solid State Switches with 2-Color Display: Direct Mount TypeD-F9NW(V), D-F9PW(V), D-F9BW(V)

Grommet PLC: Programable Logic Controller

D-F9W, D-F9WV (With indicator light)Auto switch part no.

Wiring type

Output type

Applicable load


Current consumption

Load voltage

Load current


Leakage current

Indicator light

D-F9NW

In-line

D-F9NWV

Perpendicular

D-F9PW

In-line

D-F9PWV

Perpendicular

D-F9BW

In-line

D-F9BWV

Perpendicular

3-wire

IC circuit, Relay IC, PLC

5, 12, 24 VDC (4.5 to 28 VDC)

10 mA or less


NPN

28 VDC or less

40 mA or less

2-wire

—

24 VDC relay, PLC

—

—

24 VDC (10 to 28 VDC)

5 to 40 mA

4 V or less

0.8 mA or less

—

80 mA or less

0.8 V or less

PNP

Lead wiresOilproof vinyl heavy insulation cable, ø2.7, 0.5 m0.15 mm2 × 3 cores (Brown, Black, Blue [Red, White, Black]) 0.18 mm2 × 2 cores (Brown, Blue [Red, Black])


Actuated position ..... Red LED lights upOptimum operating position ..... Green LED lights up

1.5 V or less (0.8 V or less at10 mA load current

2

2.8 22

ø2.

7Indicator light

2.6

4


Slotted set screw

Indicator light

4.3

2

3.8

3.16.2 4

ø2.7


4.6

2.8 20

OUTBlack [White]

DC (+)Brown [Red]

DC (-)Blue [Black]

DC (+)Brown[Red]

OUTBlack[White]

DC (-)Blue[Black]

OUT (+)Brown[Red]

OUT (-)Blue[Black]

D-F9WV

D-F9W

Indicator light

Auto Switch Weight

Model

0.5

3

5

D-F9NW(V) 7

34

56

D-F9PW(V) 7

34

56

D-F9BW(V) 7

32

52

Unit: g

Lead wire length(m)

Mounting screw M2.5 × 4 lSlotted set screw

Mounting screw M2.5 × 4 l

Switc

hm

ain

circu

itSw

itch

mai

n cir

cuit

Switc

hm

ain

circu

it

Electrical entry direction

Operatingrange

ON

DisplayRed Green Red

OFF


MY3A_3B.qxd 03.5.14 2:47 PM Page 29

27

Series MY3A/3B

Contact SMC for detailed dimensions, specifications and lead times.Made to Order Specfications q

Made to Order Application List

Basic short type

1 Long Stroke

Stroke range: 2001 to 3000 mm

Example) MY3A40-2700-F9B-XB11

MY3 A

MY3AMY3B

Basic short type

Basic standard type

Longstroke

Helicalinsert threads

Holdermounting bracket

XB11

Series/Bore size

Bore size Stroke Auto switch Symbol

ABasic standard typeB

-XB11

16 25 40 63

Made to

Order

Available with long strokes exceeding the standard strokes.The stroke can be set in 1 mm increments.

2 Helical Insert Thread Specification

Example) MY3B16-300L-F9B-X168

-X168

MY3 B X168

Series/Bore sizeAB

Basic short typeBasic standard type

16 25 40 63

The mounting threads of the slider are changed to helical insert threads. The thread size is the same as standard.

3 Holder Mounting Bracket ………………………Holder mounting brackets are used to fasten the stroke adjusting unit at an intermediate stroke position.

Holder mounting bracket …… -X416 Holder mounting bracket ……… -X417

-X416, X417

16254063

10121624

–10 to –20–12 to –24–16 to –32–24 to –48

20243248

Boresize

(mm)

-X416 (one side)

Adjustment range

MY3B MY3B–20 to –30–24 to –36–32 to –48–48 to –72

-X417 (one side)

Adjustment range

Fine Stroke Adjustment Range(Treated as a special order when exceeding the adjustment ranges shown below.) Unit: mm

XB11 X168 X416, X417

Bore size Stroke Auto switch Symbol

Spacer

Length (l)

Spacer

Length (l)

Slider (Slide table)Stroke adjusting unit

Head cover

l (X417)

l (X416)


Holder mounting bracket

MY3A_3B.qxd 03.5.14 2:47 PM Page 30

28

Series/Bore size

StrokeNote) Indicates the stroke prior to mounting the stroke adjusting unit.

Refer to the table below for applicable symbols.



B16 25 40 63

MY3 B Bore size 300 L X416


Holder mounting bracket

Combination symbol

NilWZLHLZHZNilWLH

L, H, LS, SL, HS, SH

L, H

LH, HL

L, H, LS, SL, HS, SHL, H

LH, HL

X416 on one side ∗ Note 2)X416 on both sidesX416 on one side, X417 on the other side ∗ Note 2)X416 on L unit sideX416 on H unit sideX416 on L unit side, X417 on the other sideX416 on H unit side, X417 on the other sideX417 on one side ∗ Note 2)X417 on both sidesX417 on L unit sideX417 on H unit side

Stroke adjusting unit SymbolMounting pcs.

Combination descriptionHolder

mountingbracket

Note 1) For LS, SL, HS and SH, the stroke adjusting unit is mounted on one side only.Note 2) The stroke adjusting unit is installed on the left side (or right side in case of SL and SH) at the time of shipment. It can however be moved to the right side (or left side).

X416

X417

X416 X417

L units with one each of X416 and X417

MY3B25-300L-X416Z

L and H units, where X417 is mounted on L unit only and nothing on H unit

MY3B25-300LH-X417L Note) The holder mounting bracket can be commonly used on the L and H units as well as the left and right sides.

L unit

L unit

L unit

H unit

X416

X417

X417

Note) Refer to the options table of "How to Order" for each series.

How to order single pieces of stroke adjusting unit

MY3B Page 1

MY3B-A16L1 X417

X417 N

Stroke adjusting unit model

Holder mounting bracket 1Holder mounting bracket 2

Holder mounting bracketX416X417

How to order single pieces of holder mounting bracket

Example) MY3B25-A25L1-X416 (X416 bracket for left side L unit of MY3B25)

Example) MY3B25-A25-X416N (X416 bracket for L and H units of MY3B)

MY3B 25

Series/Bore sizeBasic standard typeB

16 25 40 63

3 Holder Mounting Bracket ……………………… -X416, X417

Example Example

Holder mounting bracket 1Holder mounting bracket 2

Holder mounting bracketX416X417

1211111

1

111211

Basic standard type

Series MY3A/3B

Contact SMC for detailed dimensions, specifications and lead times.Made to Order Specfications w Made to

Order

–60–50–40–30–20–10

L unitH unit

L unitH unit

L unitH unit

L unitH unit

MY3B stroke adjustment range0

-X417

-X417

-X417

-X416

-X416

-X416

Standard

Standard

Standard

-X417-X416Standard

32 to 4816 to 32

32 to 4816 to 32

0 to 16

0 to 16

24 to 3612 to 240 to 12

20 to 3010 to 200 to 10

MY3B25

MY3B40

MY3B63

MY3B16

MY3A_3B.qxd 03.5.14 2:47 PM Page 31

29

Safety InstructionsSeries MY3A/3B

Note 1) ISO 4414: Pneumatic fluid power -- General rules relating to systems

Note 2) JIS B 8370: Pneumatic system axiom

Warning

Caution : Operator error could result in injury or equipment damage.

Warning : Operator error could result in serious injury or loss of life.

Danger : In extreme conditions, there is a possible result of serious injury or loss of life.

These safety instructions are intended to prevent a hazardous situation and/or equipment damage. These instructions indicate the level of potential hazard by a label of "Caution", "Warning" or "Danger". To ensure safety, be sure to observe ISO 4414 Note 1), JIS B 8370 Note 2) and other safety practices.

1. The compatibility of pneumatic equipment is the responsibility of the person who designs the pneumatic system or decides its specifications.Since the products specified here are used in various operating conditions, their compatibility for the specific pneumatic system must be based on specifications or after analysis and/or tests to meet your specific requirements. The expected performance and safety assurance will be the responsibility of the person who has determined the compatibility of the system. This person should continuously review the suitability of all items specified, referring to the latest catalog information with a view to giving due consideration to any possibility of equipment failure when configuring a system.

2. Only trained personnel should operate pneumatically operated machinery and equipment.Compressed air can be dangerous if handled incorrectly. Assembly, handling or repair of pneumatic systems should be performed by trained and experienced operators.

3. Do not service machinery/equipment or attempt to remove components until safety is confirmed.

1. Inspection and maintenance of machinery/equipment should only be performed after confirmation of safe locked-out control positions.

2. When equipment is to be removed, confirm the safety process as mentioned above. Cut the supply pressure for this equipment and exhaust all residual compressed air in the system.

3. Before machinery/equipment is restarted, take measures to prevent shooting-out, etc.

4. Contact SMC if the product is to be used in any of the following conditions:1. Conditions and environments beyond the given specifications, or if product is used outdoors.2. Installation on equipment in conjunction with atomic energy, railway, air navigation, vehicles, medical

equipment, food and beverages, recreation equipment, emergency stop circuits, clutch and brake circuit in press applications, or safety equipment.

3. An application which has the possibility of having negative effects on people, property, or animals, requiring special safety analysis.

MY3A_3B.qxd 03.5.14 2:47 PM Page 32

30

Actuator Precautions 1Be sure to read before handling.

1. There is a danger of sudden action by air cy-linders if sliding parts of machinery are twis-ted, etc., and changes in forces occur. In such cases, bodily injury may occur, e.g., by having hands or get in the machinery, or damage to the machinery itself may occur. Therefore, the machine should be designed to prevent such dangers.

2. A protective cover is recommended to mini-mize the risk of personal injury.If a driven object and moving parts of a cylinder pose a dan-ger of personal injury, design the structure to avoid contact with the human body.

3. Securely tighten all staitionary parts and con-nected parts so that they will not become loose.Particularly when a cylinder operates with high frequency or is installed where there is a lot of vibration, ensure that all parts remain secure.

4. A deceleration circuit or shock absorber may be required.When a driven object is operated at high speed or the load is heavy, a cylinder’s cushion will not be sufficient to absorb the impact. Install a deceleration circuit to reduce the speed be-fore cushioning, or install an external shock absorber to re-lieve the impact. In cases such as these, the rigidity of the ma-chinery should also be examined.

5. Consider a possible drop in operating pres-sure due to a power outage, etc.When a cylinder is used as part of a clamping mechanism, there is a danger of work pieces dropping if there is a de-crease in clamping force due to a drop in circuit pressure caused by a power outage, etc. Therefore, safety equipment should be installed to prevent human injury or damage to ma-chinery. Suspension mechanisms and lifting devices also re-quire for drop prevention measures.

6. Consider a possible loss of power source.Measures should be taken to protect against human injury and equipment damage in the event that there is a loss of power to equipment controlled by pneumatics, electricity or hydraulics, etc.

7. Design circuitry to prevent sudden lurching of driven objects. Take special care when a cylinder is driven by an exhaust center type directional control valve or when starting up after residual pressure is exhausted from the circuit, etc. The piston and its driven object will lurch at high speed if pressure is ap-plied to one side of the cylinder because of the absence of air pressure inside the cylinder. Therefore, equipment should be selected and circuits designed to prevent sudden lurching be-cause there is a danger of human injury particularly to limbs, and/or damage to equipment when this occurs.

8. Consider emergency stops.Design the system so that human injury and/or damage to ma-chinery and equipment will not be caused when machinery is stopped by a safety device responding to abnormal conditions such as a power outage or a manual emergency stop.

9. Consider the action when operation is restar-ted after an emergency stop or abnormal stop.Design the machinery so that human injury or equipment dam-age will not occur upon restart of operation. When the cylinder has to be reset at the starting position, install safe manual control equipment.

Design

Warning

1. Confirm the specifications.The products featured in this catalog are designed for use in industrial compressed air systems. If the products are used in conditions where pressure and/or temperature are out of the range of specifications, damage and/or malfunction may oc-cur. Do not use in these conditions. (Refer to specifications.)Consult SMC if fluid other than compressed air is required.

2. Intermediate stopsWhen intermediate stopping of a cylinder piston is performed with a 3-position closed center type directional control valve, it is difficult to achieve stopping positions as accurate and precise as with hydraulic pressure due to the compressibility of air.Furthermore, since valves and cylinders are not guaranteed for zero air leakage, it may not be possible to hold a stopped posi-tion for an extended period of time. Contact SMC in case it is necessary to hold a stopped position for an extended period.

Selection

1. Operate within the limits of the maximum usable stroke.Refer to the air cylinder model selection procedure for the maximum useable stroke.

2. Operate the piston in such a way that colli-sion damage will not occur at the stroke end.Operate within such a range such that will prevent damage from occuring when a piston, having inertial force, stops by striking the cover at the stroke end. Refer to the cylinder mod-el selection procedure for the maximum usable stroke.

3. Use a speed controller to adjust the cylinder drive speed, gradually increasing from a low speed to the desired speed setting.

4. Provide intermediate supports for long stroke cylinders.Provide intermediate supports for cylinders with long strokes to prevent rod damage due to sagging of the rod, deflection of the tube, vibration and external loads.For detailed information, please refer to "Guide for Using Side Supports" on page 18.

Caution

Warning

Series MY3A/3B

∗ The external shock absorber should conform to the conditions on page 8. Use caution because the use of a shock absorber falling short of the recommended conditions may damage the cylinder.

MY3A_3B.qxd 03.5.14 2:47 PM Page 33

31


Series MY3A/3B

1. Do not apply strong impacts or excessive moment to the slide table (slider).Do not apply strong impact or excessive moment in mounting the work piece because the slide table (slider) is supported by resin bearings.

2. Align carefully when connecting to a load having an external guide mechanism.A mechanically jointed rodless cylinder can be used with a di-rect load within the allowable range for each guide type, how-ever, careful alignment is required when connecting to a load having an external guide mechanism. The longer the stroke, the larger the deflection of the axis centre becomes. There-fore, adopt an appropriate connection method (floating mecha-nism) to absorb the difference. For Series MY3A and MY3B, dedicated floating mechanism brackets are available (page 9).

3. Do not scratch or gouge the cylinder tube by striking or grasping it with other objects.Cylinder shape is manufactured to precise tolerances, so that even a slight deformation may cause faulty operation.

4. Do not use until you can verify that equip-ment can operate properly.Following mounting repairs, or conversions, verify correct mounting by conducting suitable function and leakage tests after piping and power connections have been made.

5. Instruction manualThe product should be mounted and operated after thorough-ly reading the manual and understanding its contents.Keep the instruction manual where it can be referred to as needed.

6. At each end of the cylinder, secure a mount-ing surface with a 5 mm or longer area that contacts the lower side of the cylinder.

MountingMounting

Caution1. Preparation before piping

Before piping is connected, it should be thoroughly blown out with air (flushing) or washed to remove chips, cutting oil, and other debris from inside the pipe.

2. Wrapping of sealant tapeWhen screwing together pipes and fittings, etc., be certain that chips from the pipe threads and sealing material do not get in-side the piping.Also, when sealant tape is used, leave 1.5 to 2 thread ridges exposed at the end of the threads.

Piping

Caution

7. If the cylinder is mounted on the ceiling or wall under the condition where high load factors or impacts are expected, use side supports, in addition to the fixing bolts on the head cover, to support both ends of the cylinder tube.

Wrapping direction

Sealant tapeExpose approx. 2 threads

5 mm or more5 mm or more

Side support

Side support

1. Readjust using the cushion needle.Cushion needles are adjusted at the time of shipment. When the cylinder is put into service, the cushion needles should be readjusted based on factors such as the size of the load and the operating speed. When the cushion needles are turned clockwise, restriction of the air flow becomes greater and thus the cushioning effect also increases.

2. Do not operate with the cushion needles fully closed.It may damage the seals.

Cushion (MY3B)Cushion (MY3B)

HandlingHandling

Caution

1. Lubrication of non-lube type cylinderThe cylinder is lubricated for life at the factory and can be used without any further lubrication.However, in the event that it is lubricated additionally, be sure to use class 1 turbine oil (with no additives) ISO VG32.Stopping lubrication later may lead to malfunctions because the new lubricant will cancel out the original lubricant. There-fore, lubrication must be continued once it has been started.

Lubrication

Caution

1. Avoid operation that causes negative pres-sure inside the cylinder.Take precautions under operating conditions in which nega-tive pressure is increased inside the cylinder by external for-ces or inertial forces. Air leakage may occur due to separa-tion of the seal belt.

Caution

MY3A_3B.qxd 03.5.14 2:47 PM Page 34

32


Series MY3A/3B

1. Use clean air.Do not use compressed air containing chemicals, synthetic oils containing organic solvents, salt or corrosive gases, as this can cause damage or malfunction.

Air Supply

Warning

1. Install air filters.Install air filters at the upstream side of valves. The filtration degree should be 5 µm or finer.

2. Install an after-cooler, air dryer or water sep-arator, etc.Air that includes excessive drainage or condensate may cause malfunction of valves and other pneumatic equipment. To prevent this, install an after-cooler, air dryer or water separator, etc.

3. Use the product within the specified range of fluid and ambient temperature.Take measures to prevent freezing when 5°C or less, since moisture in circuits can freeze and cause damage to seals and lead to malfunctions.

Refer to SMC’s Best Pneumatics catalog Vol. 4 for further details on compressed air quality.

Caution

1. Do not use in environments where there is a danger of corrosion.Refer to the construction drawings regarding cylinder materi-als.

2. Avoid use in environments where a cylinder will come in contact with coolants, cutting oil, water, adhesive matter, or dust, etc. Also avoid operation with compressed air that contains drainage or foreign matter, etc.

• Foreign matter or liquids on the cylinder's interior or exterior can wash out the lubricating grease, which can lead to deterioration and damage of dust seal band and seal materials, causing a danger of malfunction.

When operating in locations with exposure to water and oil drops, or in dusty locations, provide protection such as a cover to prevent direct contact with the cylinder, or mount so that the dust seal band surface faces downward, and operate with clean compressed air.

Operating EnvironmentOperating Environment

Warning

1. Perform maintenance inspection according to the procedure indicated in the instruction manual.Improper handling and maintenance may cause malfunction-ing and damage of machinery or equipment to occur.

MaintenanceMaintenance

Warning

1. Filter drainageDrain out condensate from air filters regularly.

Caution

CautionCentralized Piping Port Variations

• Head cover piping connection can be freely selected to best suit different piping conditions.

2. Removal of components, and supply/exhaust of compressed air.When equipment is removed, first check measures to prevent dropping of driven objects and run-away of equipment, etc. Then cut off the supply pressure and electric power, and ex-haust all compressed air from the system.When machinery is restarted, proceed with caution after con-firming measures to prevent cylinder lurching.

Port variations

R

R L

R L

R

LL

L R

Slide table operating direction

R L

R L

R

L

R

L

MY3A_3B.qxd 03.5.14 2:47 PM Page 35

33

Auto Switch Precautions 1Be sure to read before handling.

Series MY3A/3B

1. Confirm the specifications.Read the specifications carefully and use this product appropriately. The product may be damaged or malfunction if it is used outside the range of specifications of current load, voltage, temperature or impact.

2. Take precautions when multiple cylinders are used close together.When two or more auto switch cylinders are lined up in close proximity to each other, magnetic field interference may cause the switches to malfunction. Maintain a minimum cylinder separation of 40 mm. (When the allowable interval is specified for each cylinder series, use the indicated value.)

3. Pay attention to the length of time that a switch is on at an intermediate stroke posi-tion.When an auto switch is placed at an intermediate position of the stroke and a load is driven at the time the piston passes, the auto switch will operate, but if the speed is too great, the operating time will be shortened and the load may not operate properly. The maximum detectable piston speed is:

4. Keep wiring as short as possible.<Reed switch>As the length of the wiring to a load gets longer, the rush current at switching ON becomes greater, and this may shorten the product’s life. (The switch will stay ON all the time.)1) Use a contact protection box when the wire length is 5 m or

longer.<Solid state switch>2) Although wire length should not affect switch function, use

a wire that is 100 m or shorter.

5. Take precautions for the internal voltage drop of the switch.<Reed switch>1) Switches with an indicator light (Except D-A96, A96V)

• If auto switches are connected in series as shown below, take note that there will be a large voltage drop because of internal resistance in the light emitting diodes. (Refer to internal voltage drop in the auto switch specifications.)

[The voltage drop will be “n” times larger when “n” auto switches are connected.]

Even though an auto switch operates normally, the load may not operate.

Design and SelectionDesign and Selection

Load

• Similarly, when operating below a specified voltage, it is possible that the load may be ineffective even though the auto switch function is normal. Therefore, the formula below should be satisfied after confirming the minimum operating voltage of the load.

2) If the internal resistance of a light emitting diode causes a problem, select a switch without an indicator light (Model A90, A90V).

<Solid state switch>3) Generally, the internal voltage drop will be greater with a 2-

wire solid state auto switch than with a reed switch. Take the same precautions as in 1) above.Also, note that a 12 VDC relay is not applicable.

6. Pay attention to leakage current.<Solid state switch>With a 2-wire solid state auto switch, current (leakage current) flows to the load to operate the internal circuit even when in the OFF state.

If the condition given in the above formula is not met, it will not reset correctly (stays ON). Use a 3-wire switch if this specification cannot be satisfied.Moreover, leakage current flow to the load will be “n” times larger when “n” auto switches are connected in parallel.

7. Do not use a load that generates surge vol-tage.<Reed switch>If driving a load such as a relay that generates a surge voltage, use a contact protection box.<Solid state switch>Although a zener diode for surge protection is connected at the output side of a solid state auto switch, damage may still occur if a surge is applied repeatedly. When directly driving a load which generates surge, such as a relay or solenoid valve, use a type of switch with a built-in surge absorbing element.

8. Cautions for use in an interlock circuitWhen an auto switch is used for an interlock signal requiring high reliability, devise a double interlock system to safeguard against malfunctions by providing a mechanical protection function, or by also using another switch (sensor) together with the auto switch. Also perform periodic inspection and confirm proper operation.

9. Ensure sufficient clearance for maintenance activities.When designing an application, be sure to allow sufficient clearance for maintenance and inspections.

Warning

V (mm/s) = Auto switch operating range (mm)

Load operating time (ms) 1000

Supplyvoltage

Internal voltagedrop of switch

Minimum operatingvoltage of load– >

>Current to operate load (OFF condition)

Leakage current

MY3A_3B.qxd 03.5.14 2:47 PM Page 36

34


Series MY3A/3B

1. Do not drop or bump.Do not drop, bump or apply excessive impacts (300m/s2 or more for reed switches and 1000m/s2 or more for solid state switches) while handling.Although the body of the switch may not be damaged, the inside of the switch could be damaged and cause a malfunction.

2. Do not carry a cylinder by the auto switch lead wires.Never carry a cylinder by its lead wires. This may not only cause broken lead wires, but it may cause internal elements of the switch to be damaged by the stress.

3. Mount switches using the proper tightening torque.When a switch is tightened beyond the range of tightening torque, the mounting screws, or switch may be damaged. On the other hand, tightening below torque range may allow the switch to slip out of position.

4. Mount a switch at the center of the operating range.Adjust the mounting position of an auto switch so that the piston stops at the center of the operating range (the range in which a switch is ON). (The mounting positions shown in the catalog indicate the optimum position at stroke end.) If mounted at the end of the operating range (around the borderline of ON and OFF), operation will be unstable.

5. Do not allow short circuit of loads.<Reed switch>If the power is turned ON with a load in a short circuited condition, the switch will be instantly damaged because of excess current flow into the switch.<Solid state switch>D-M9 and all models of PNP output type switches do not have built-in short circuit protection circuits. If loads are short circuited, the switches will be instantly damaged, as in the case of reed switches.Take special care to avoid reverse wiring with the brown [red] power supply line and the black [white] output line on 3-wire type switches.

6. Avoid incorrect wiring.<Reed switch>A 24 VDC switch with indicator light has polarity. The brown [red] lead wire is (+), and the blue [black] lead wire is (–).1) If connections are reversed, the switch will still operate, but

the light emitting diode will not light up.Also note that a current greater than the maximum specified one will damage a light emitting diode and make it inoperable.Applicable models: D-A93, A93V

<Solid state switch>1) Even if connections are reversed on a 2-wire type switch,

the switch will not be damaged because it is protected by a protection circuit, but it will remain in a normally ON state. But reverse wiring in a load short circuit condition should be avoided to protect the switch from being damaged.

2) Even if power supply line (+) and power supply line (–) power supply line connections are reversed on a 3-wire type switch, the switch will be protected by a protection circuit. However, if the power supply line (+) is connected to the blue [black] wire and the power supply line (–) is connected to the black [white] wire, the switch will be damaged.

Mounting and AdjustmentMounting and Adjustment WiringWiring

1. Avoid repeatedly bending or stretching lead wires.Broken lead wires will result from repeatedly applying bending stress or stretching force to the lead wires.

2. Be sure to connect the load before power is applied.<2-wire type>If the power is turned ON when an auto switch is not connected to a load, the switch will be instantly damaged because of excess current.

3. Confirm proper insulation of wiring.Be certain that there is no faulty wiring insulation (such as contact with other circuits, ground fault, improper insulation between terminals, etc.). Damage may occur due to excess current flow into a switch.

4. Do not wire in conjunction with power lines or high voltage lines.Wire separately from power lines or high voltage lines, avoiding parallel wiring or wiring in the same conduit with these lines. Control circuits containing auto switches may malfunction due to noise from these other lines.

WiringWiring

Warning

Warning

∗ Lead wire color changes

OldRed

Black

NewBrownBlue

Output (+)Output ()

2-wireOldRed

BlackWhite

NewBrownBlueBlack

Power supplyGNDOutput

3-wire

OldRed

BlackWhiteYellow

NewBrownBlueBlack

Orange

Power supplyGNDOutputDiagnostic output

Solid state with diagnostic output

OldRed

BlackWhite

Yellow

NewBrownBlueBlack

Orange

Power supply GNDOutputLatch typediagnostic output

Solid state with latchtype diagnostic output

Lead wire colors of SMC switches have been changed in order to meet NECA Standard 0402 for production beginning September, 1996 and thereafter. Please refer to the tables provided.Special care should be taken regarding wire polarity during the time that the old colors still coexist with the new colors.

MY3A_3B.qxd 03.5.14 2:47 PM Page 37

35


Series MY3A/3B

1. Never use in an atmosphere of explosive ga-ses. The construction of auto switches is not intended to prevent explosion. Never use in an atmosphere with an explosive gas since this may cause a serious explosion.

2. Do not use in an area where a magnetic field is generated.Auto switches will malfunction or magnets inside cylinders will become demagnetized if used in such an environment.

3. Do not use in an environment where the auto switch will be continually exposed to water.Switches satisfy IEC standard IP67 construction (JIS C 0920: watertight construction). Nevertheless, they should not be used in applications where they are continually exposed to water splash or spray. This may cause deterioration of the insulation or swelling of the potting resin inside switches may cause malfunction.

4. Do not use in an environment with oil or chemicals.Consult with SMC if auto switches will be used in an environment laden with coolant, cleaning solvent, various oils or chemicals. If auto switches are used under these conditions for even a short time, they may be adversely affected by a deterioration of the insulation, a malfunction due to swelling of the potting resin, or hardening of the lead wires.

5. Do not use in an environment with tempera-ture cycles.Consult with SMC if switches are to be used where there are temperature cycles other than normal temperature changes, as they may be adversely affected internally.

6. Do not use in an environment where there is excessive impact shock.<Reed switch>When excessive impact (300 m/s2 or more) is applied to a reed switch during operation, the contact point may malfunction and generate or cut off a signal momentarily (1 ms or less). Consult with SMC regarding the need to use a solid state switch depending upon the environment.

7. Do not use in an area where surges are gen-erated.<Solid state switch>When there are units (such as solenoid type lifters, high frequency induction furnaces, motors, etc.) that generate a large amount of surge in the area around cylinders with solid state auto switches, their proximity or pressure may cause deterioration or damage to the internal circuit elements of the switches. Avoid sources of surge generation and crossed lines.

8. Avoid accumulation of iron debris or close contact with magnetic substances.When a large accumulated amount of ferrous waste such as machining chips or welding spatter, or a magnetic substance (something attracted by a magnet) is brought into close proximity to an cylinder with auto switches, this may cause the auto switches to malfunction due to a loss of the magnetic force inside the cylinder.

Operating EnvironmentOperating Environment

1. Perform the following maintenance periodi-cally in order to prevent possible danger due to unexpected auto switch malfunction.1) Securely tighten switch mounting screws.

If screws become loose or the mounting position is dislocated, retighten them after readjusting the mounting position.

2) Confirm that there is no damage to lead wires.To prevent faulty insulation, replace switches or repair lead wires, etc., if damage is discovered.

3) Confirm that the green light on the 2-color display type switch lights up.Confirm that the green LED is ON when stopped at the set position. If the red LED is ON, when stopped at the set position, the mounting position is not appropriate. Readjust the mounting position until the green LED lights up.

MaintenanceMaintenance

1. Consult with SMC concerning water resis-tance, elasticity of lead wires and usage at welding sites, etc.

OtherOther

Warning Warning

Warning

MY3A_3B.qxd 03.5.14 2:47 PM Page 38

1. Use caution not to have your hands caught in the unit.When using a cylinder with stroke adjusting unit, the space between the slide table (slider) and the stroke adjusting unit is very narrow. Care should be taken to avoid the danger of hands being caught in this small space. Install a protective cover to prevent the risk of accidents to the human body.

2. Use an external guide (MY3B). The stroke adjusting unit must be used on condition that an external guide is used. If a stroke adjusting unit is used where the cylinder is used alone, the collision reaction may cause damage to the cylinder.

3. Conduct stroke adjustment with an adjustment bolt as follows: The adjustment bolt should be secured on the same surface as the shock absorber after stroke adjustment.If the stopper surface of the shock absorber and the end surface of the adjustment bolt are not on the same level, it may result in an unstable stop position of the slide table or reduced durability.

4. Securing the unit body

Tighten the four unit fixing bolts equally to secure the unit body.

5. Do not fix and use the stroke adjusting unit at an intermediate position (MY3B).If the stroke adjusting unit is fixed at an intermediate position, an error may result depending on the collision energy. In that case, the use of the holder mounting bracket for adjustment is recommended. It is provided with the "-X416" or "-X417" made-to-order specification.(Refer to the tightening torque for the stroke adjusting unit fixing bolt.)If the stroke adjusting unit is used at an intermediate position, the energy absorption capacity may be different. Refer to the maximum absorbed energy on page 7 and operate within the allowable absorption energy.

<Stroke adjustment with adjustment bolt>Loosen the lock nut for the adjustment bolt, adjust the stroke on the head cover side with a hexagon wrench, and secure with a lock nut.

<Stroke adjustment with shock absorber>Loosen the two unit fixing bolts on the shock absorber side and rotate the shock absorber for stroke adjustment. Tighten the unit fixing bolts equally to secure the shock absorber (MY3B). Use caution not to overtighten the fixing bolts.(Refer to the tightening torque for the MY3B stroke adjusting unit fixing bolt.)

36

Handling

Caution

<MY3B>

Shock absorber

Stroke adjusting unitAdjusting bolt lock nut

Bore size (mm)

16

25

40

63

UnitHLHLHLH

Tightening torque1.21.23.33.3

10 3.3

10

Unit: Nm

0.6

3.0

12

24

LHLHLHLH

MY3B stroke adjusting unitTightening torque for holding bolts

Specific Product Precautions 1Be sure to read before handling.Refer to pages 29 through 35 for safety instructions, actuator precautions and auto switch precautions.

Series MY3A/3B

Shock absorber

Same side

Adjusting bolt

MY3A_3B.qxd 03.5.14 2:47 PM Page 39

SMC'S GLOBAL MANUFACTURING, DISTRIBUTION AND SERVICE NETWORK

Printed in Japan.

SLOVAKIASMC Priemyselná Automatizáciá, s.r.o.

SLOVENIASMC Industrijska Avtomatika d.o.o.

SPAIN/PORTUGALSMC España, S.A.

SWEDENSMC Pneumatics Sweden AB

SWITZERLANDSMC Pneumatik AG.

UKSMC Pneumatics (U.K.) Ltd.

ASIACHINASMC (China) Co., Ltd.

HONG KONGSMC Pneumatics (Hong kong) Ltd.

INDIASMC Pneumatics (India) Pvt. Ltd.

INDONESIAPT. SMC Pneumatics Indonesia

MALAYSIASMC Pneumatics (S.E.A.) Sdn. Bhd.

PHILIPPINESSMC Pneumatics (Philippines), Inc.

SINGAPORESMC Pneumatics (S.E.A.) Pte. Ltd.SOUTH KOREASMC Pneumatics Korea Co., Ltd.

TAIWANSMC Pneumatics (Taiwan) Co., Ltd.

THAILANDSMC Thailand Ltd.

NORTH AMERICACANADASMC Pneumatics (Canada) Ltd.

MEXICOSMC Corporation (Mexico) S.A. de C.V.USASMC Corporation of America

SOUTH AMERICAARGENTINASMC Argentina S.A.

BOLIVIASMC Pneumatics Bolivia S.R.L.

BRAZILSMC Pneumaticos Do Brazil Ltda.

CHILESMC Pneumatics (Chile) S.A.

VENEZUELASMC Neumatica Venezuela S.A.

OCEANIAAUSTRALIASMC Pneumatics (Australia) Pty. Ltd.

NEW ZEALANDSMC Pneumatics (N.Z.) Ltd.

EUROPEAUSTRIASMC Pneumatik GmbH

CZECH

SMC Industrial Automation CZ s.r.o.

DENMARKSMC Pneumatik A/S

FINLANDSMC Pneumatiikka Oy

FRANCESMC Pneumatique SA

GERMANYSMC Pneumatik GmbH

HUNGARYSMC Ipari Automatizálási Kft.

IRELANDSMC Pneumatics (Ireland) Ltd.

ITALYSMC Italia S.p.A.

LATVIASMC Pnuematics Latvia SIA

NETHERLANDSSMC Pneumatics BV.

NORWAYSMC Pneumatics Norway A/S

POLANDSMC Industrial Automation Polska Sp.z.o.o.

ROMANIA SMC Romania s.r.l.

RUSSIA SMC Pneumatik LLC.

1-16-4 Shimbashi, Minato-ku, Tokyo 105-8659 JAPANTel: 03-3502-2740 Fax: 03-3508-2480URL http://www.smcworld.com© 2003 SMC CORPORATION All Rights Reserved

Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.

Printed in Japan.1st printing May, 2003 D-DN P-120 (DN)

This catalog is printed on recycled paper with concern for the global environment.

MY3A_3B.qxd 03.5.14 2:47 PM Page 40

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