SHOCK ABSORBER FOR LINEAR SLIDE CYLINDER SKL … · Shock absorber SKL Series Maximum absorbed...

SHOCK ABSORBER FOR LINEAR SLIDE CYLINDER SKL SERIES

SKL Series

CKD conventional products (NCK-0.3 with cap)

Speed up the tact times of your equipment and help improve productivity!

Fast tact

Significantly shortens operating time thanks to the short strokeSuitable for fast tact and high accuracy of the linear slide cylinder. Shortens the operating time of the device to help increase productivity.

50%reduction from

previous model

SKL Series

CKD conventional products (NCK-0.3 with cap)

Speed up the tact times of your equipment and help improve productivity!

Fast tact

Significantly shortens operating time thanks to the short strokeSuitable for fast tact and high accuracy of the linear slide cylinder. Shortens the operating time of the device to help increase productivity.

50%reduction from

previous model

Shock absorber

SKL Series Maximum absorbed energy: 0.2 to 3.6J

SpecificationsDescription SKLModel No. SKL-0804 SKL-0805 SKL-1006 SKL-1208Maximum absorbed energy J 0.2 0.5 1.2 3.6O.D. thread size mm M8 × 0.75 M10 × 1.0 M12 × 1.0Stroke length mm 3.5 4.5 6 8Max. absorbed energy per hour kJ/hr. 0.9 2.4 4.3 12.9Max. colliding speed m/s 1.0Max. operating frequency Cycle/min. 80 60Ambient temperature °C -10 (14 °F) to 60 (140 °F)Maximum allowable thrust N 40 158 281 687Maximum load (rated resistance) N 152 277 484 1064Required mounting strength N 456 831 1452 3192Return time s 0.3 or lessProduct weight g 9 12 20 40ReturnSpring force

When extended N 3.3 3.3 2.3 3.4When compressed N 4.6 4.6 4.2 5.9

Note : The speed and absorption capacity of the shock absorber vary depending on the ambient temperature. Values given in the above specifications are for room temperature.

How to order

Model No.

Stroke lengthB

SKL

Thread sizeA

Code ContentThread size

08 M8 × 0.7510 M10 × 1.012 M12 × 1.0

Stroke length (mm)Thread size 08 10 12

04 3.5 mm05 4.5 mm06 6 mm08 8 mm

A

B

08 05

1

SKL SeriesInternal structure and parts listDimensionsInternal structure and parts list

Parts listNo. Part name Material Remarks No. Part name Material Remarks

1 Piston rod Steel Industrial chrome plating 8 Piston Cast iron

2 Cover Stainless steel 9 Hexagon nut Steel Zinc plated

3 Oil seal Special nitrile rubber 10 Valve stopper Steel

4 O-ring Nitrile rubber 11 E type snap ring Stainless steel

5 Rod guide Aluminum alloy 12 Damper case Steel Nickel plating

6 Air chamber Nitrile rubber 13 Spring Piano wire

7 Valve Steel 14 Steel ball Steel

Dimensions

Model No. A C F G J K L LL M N P QSKL-0804 34.5 30.5 4 2 M8 × 0.75 2.8 12 13.9 6.5 23 6 5

SKL-0805 44.5 39.5 4 2 M8 × 0.75 2.8 12 13.9 7.5 32 6 5

SKL-1006 49 42.5 4 2 M10 × 1.0 3 14 16.2 9 34 8 6

SKL-1208 56 47.5 5 2 M12 × 1.0 3.5 17 19.6 12 37 10 7

Cannot be disassembled

1 2 3 4 5 6 7 8 9 10 11 12 13 14

F F

J

Q

G

M N (thread part)

C

A

φ K

P

L

LLP

2

SKL Mounted Cylinder (1)Linear Slide Cylinder LCR Series

How to orderWithout switch

With switch

LCR 8 40 S506 DTBLN

LCR R40 S506 DTBLN12 F2H*

Model No.

A Bore size

Stroke lengthB

Switch quantityD

Switch model No.C

StopperE

OptionF

Precautions for model No. selection*1: For the adjustable stroke range with a shock absorber stopper,

refer to the stopper dimensions table in "Pneumatic Cylinders II (No. CB-030SA)".

*2: For the port position, refer to the stopper dimensions in "Pneumatic Cylinders II (No. CB-030SA)".

*3: The positions of the standard port without stopper are (1) and (3) in the figure below.

*4: Refer to options C* and W* for combination of the stroke adjusting stopper and shock absorber stopper.

*5: Can be selected for the type with stopper only.*6: A switch for buffer should be purchased separately. Refer to

how to order a switch in "Pneumatic Cylinders II (No. CB-030SA)".

*7: Refer to the selection table on page 6 for combinations of options.

*8: A1**, A2**, A5** and A6** of φ 6 to φ 8 with 10 mm stroke length or less and φ 12 to φ 25 with 20 mm stroke length or less require custom order since they are not stroke length adjustable.

*9: When two switches are necessary for the type with S*** or A*** of φ 6 to φ 8 with 30 mm stroke length or less, select the F*H switch.

*10: Select when using rear piping.*11: Can be selected only when using stroke adjusting stopper (S)

and one side mixed (C).*12: When two switches are necessary or a switch is installed on

the head side of W3 to 6 (two-sided combined stopper) of φ 6 (all stroke lengths), φ 8 with 20 or 30 mm stroke length, φ 12 with 30 to 50 mm stroke length or φ 16 with 30 to 50 mm stroke length, select the straight lead wire.

*13: Cannot be selected when choosing two-sided combined (W).*14: The adjustable stroke range when choosing two-sided combined (W)

is φ 6: 9 mm, φ 8: 13.5 mm, φ 12: 14.5 mm, φ 16: 15 mm, φ 20: 13 mm, φ 25: 10 mm.

*15: The stroke adjusting stopper for 0.3 MPa and over working pressure is the metal sealing type.

[Example of model No.]LCR-12-40-F2H-R-A1DTModel: Linear slide cylinder double acting/single rod LCRA Bore size : φ 12B Stroke length : 40 mmC Switch model No. : Proximity/2-wire

Lead wire straightD Switch quantity : 1 (on rod side)E Stopper : Shock absorber stopper

Stopper position (1)F Option : With side and bottom ports

Material, steel (nitriding)

1

2 4

3

Stopper position

Code ContentBore size6 φ 68 φ 8

12 φ 1216 φ 1620 φ 2025 φ 25

Stroke length (mm)Bore size (φ)

6 8 12 16 20 2510 1020 2030 3040 4050 5075 75

100 100125 125150 150

* Lead wire lengthBlank 1 m (Standard)

3 3 m (Option)5 5 m (Option)

Switch quantityR 1 on rod sideH 1 on head sideD 2

StopperRefer to "Stopper" on page 4.

Blank Port on the stopper: without portD Port on stopper: side and bottom ports *2, *5, *13

Blank Stopper block material: steelT Stopper block material: steel (nitriding) *5

B With buffer *6, *7B Without switch groove

BL With switch groovePlug attached

Blank NoneN With side piping port plug (not available for φ 6, φ 25) *10

Switch model No.Lead wire straight

Radial lead wire Co

ntact Voltage Indicator

lampLead wire

Bore sizeAC DC φ 6 φ 8 φ 12 φ 16 φ 20 φ 25

F2S*P

roxi

mity

1-color display

2-wireF3S* 3-wire

F2H* F2V* 2-wireF3H* F3V* 3-wire

F3PH* F3PV* 1-color display (PNP output) (custom order) 3-wire

F2YH* F2YV* 2-color display

2-wireF3YH* F3YV* 3-wireT0H* T0V*

Ree

d 1-color display2-wire

T5H* T5V* No indicator lampT2H* T2V*

Pro

xim

ity

1-color display

2-wireT3H* T3V* 3-wire

T3PH* T3PV* 1-color display (PNP output)(Custom order) 3-wire

T2WH* T2WV* 2-color display

2-wireT3WH* T3WV* 3-wire

A

B

C

D

E

3

SKL Mounted Cylinder LCR SeriesHow to order

[(E) Stopper]Code ContentStopper

Blank No optionS Stroke adjusting stopper *4, *7

S1** Stopper position (1) (can be changed to (4))

Stop

per

Inst

alla

tion

posit

ion

S2** Stopper position (2) (can be changed to (3))S3** Stopper position (3) (can be changed to (2))S4** Stopper position (4) (can be changed to (1))S5** Stopper position (1), (3)S6** Stopper position (2), (4)

A Shock absorber stopper *1, *4, *7A1 Stopper position (1) (can be changed to (4))

Stop

per

Inst

alla

tion

posit

ion

A2 Stopper position (2) (can be changed to (3))A3 Stopper position (3) (can be changed to (2))A4 Stopper position (4) (can be changed to (1))A5 Stopper position (1), (3)A6 Stopper position (2), (4)

W Two-sided combined double stopper (shock absorber stopper, metal stopper) *12, *14W1 A1 + metal stopper

Stop

per

Insta

llatio

n po

sition

W2 A2 + metal stopperW3 A3 + metal stopperW4 A4 + metal stopperW5 A5 + metal stopperW6 A6 + metal stopper

Code Content

C One side hybrid stopper mix (shock absorber stopper, stroke adjusting stopper)C1** A1 + S3

Stoppe

rIns

tallatio

n posi

tion

C2** A2 + S4C3** A3 + S1C4** A4 + S2

**part Adjustable stroke range Compatible with all. ▲Compatible with some. *11Protruding end Return end Stopper model No.

S A W CBlank 5 mm or none 5 mm or none

- -

02 15 mm or none 15 mm or none03 25 mm or none 25 mm or none04 15 mm 5 mm -05 25 mm 5 mm -06 5 mm 15 mm -07 5 mm 25 mm -

Stopper model No. selection method

1 Stopper combination tableModel No.-[(1) Stopper] [(2) Stopper position][(3)] Example) LCR-8-40-[S] [5]06

Stroke adjusting (one side) Shock absorber (one side) Two-sided combined double stopper One-sided hybrid stopper mixStopper model No. [(1)]

[S] [A] [W] [C]

Stop

per p

ositi

on m

odel

No.

[

(2) ]

[1]

[S1] [A1] [W1] [C1]

[2]

[S2] [A2] [W2] [C2]

[3]

[S3] [A3] [W3] [C3]

[4]

[S4] [A4] [W4] [C4]

[5]

[S5] [A5] [W5]

[6]

[S6] [A6] [W6]

Shows the piping direction.If two-sided combined [W] is selected, the stopper bracket comes with piping on both sides, (piping direction) and the reverse side stopper bracket comes with a plug.

: Shock absorber stopper : Stroke adjusting stopper (adjustable range 5 mm): Metal adjusting stopper (adjustable range 15 mm)

E

*16: When changing the stopper position from the head side to the rod side, the stopper must be purchased separately according to the stroke length and adjustable stroke length. Refer to "Precautions when purchasing discrete stopper" in "Pneumatic Cylinders II (Catalog No. CB-030SA)".

A1, A2 and adjustable stroke length of 15 mm and 25 mm may not be available depending on the stroke length.

4

SKL Mounted Cylinder LCR Series

Stopper model No. selection method

2 Stopper combination tableModel No. - [(1) (2) Stopper] [(3) Adjustable stroke range]Example) LCR-8-40-S5 [06]For stroke adjusting stopper -S

: Stroke adjusting stopper (adjustable range 5 mm): Stroke adjusting stopper (adjustable range 15 mm): Stroke adjusting stopper (adjustable range 25 mm)

Stopper adjusting range Stopper model No. [(1) (2)]Protruding end Return end [S1] [S2] [S3] [S4] [S5] [S6]

Adj

usta

ble

stro

ke ra

nge

Mod

el N

o. [(

3)]

Blank5 mm

orNone

5 mmor

None[S1] [S2] [S3] [S4] [S5] [S6]

[02]15 mm

orNone

15 mmor

None[S102] [S202] [S302] [S402] [S502] [S602]

[03]25 mm

orNone

25 mmor

None[S103] [S203] [S303] [S403] [S503] [S603]

[04] 15 mm 5 mm

[S504] [S604]

[05] 25 mm 5 mm

[S505] [S605]

[06] 5 mm 15 mm

[S506] [S606]

[07] 5 mm 25 mm

[S507] [S607]

shows the piping direction.Cannot be selected for shock absorber [A] and two-sided combined [W].

3 For one-sided hybrid stopper mix - C: Stroke adjusting stopper (adjustable range 15 mm): Stroke adjusting stopper (adjustable range 25 mm)

: Shock absorber stopper : Stroke adjusting stopper (adjustable range 5 mm)

Stopper adjusting range Stopper model No. [(1) (2)]Protruding end Return end [C1] [C2] [C3] [C4]

Adju

stab

le s

troke

rang

e M

odel

No.

[(3)

]

Blank

5 mmor

shockabsorber

5 mmor

shockabsorber [C1] [C2] [C3] [C4]

[02]

15 mmor

shockabsorber

15 mmor


[03]

25 mmor

shockabsorber

25 mmor


shows the piping direction.For the adjustable stroke range for a shock absorber stopper, refer to the stopper dimensions table in "Pneumatic Cylinders II (No. CB-030SA)".

5

LCR Double acting/single rod selection table(Combination with stroke adjusting stopper, shock absorber stopper) : Available -: Not available

Model No.

Stopper Stroke adjusting

Stopper code S1 S2 S3 S4 S5 S6Adjustment length code

Bore size Stroke Blank 02 03 Blank 02 03 Blank 02 03 Blank 02 03 Blank 02 03 04 05 06 07 Blank 02 03 04 05 06 07

LCR

φ 6,φ 810 - - - - - - - - - - - - - - - -

20 or more - - - - - - - - - -

φ 12 to φ 2510 - - - - - - - - - - - - - - - -20 - - - - - -

30 or more

LCR-B, BL

φ 6,φ 810 - - - - - - - - - - - - - - - -

20 or more - - - - - - - - - - - - - - - -

φ 12 to φ 2510 - - - - - - - - - - - - - - - -20 - - - - - -

30 or more - - - - - -

Model No.

Stopper Shock absorber Two-sided combined double stopper One-sided hybrid stopper mix

Stopper code A1 A2 A3 A4 A5 A6 W1 W2 W3 W4 W5 W6C1 C2 C3 C4

Adjustment length codeBore size Stroke Blank 02 03 Blank 02 03 Blank 02 03 Blank 02 03

LCR

φ 6,φ 810 - - - - - - - - - - - - - - - - - -

20 or more - - - -

φ 12 to φ 2510 - - - - - - - - - - - - - - - - - -20 - - - - - - - - - - - - - - - -

30 or more

LCR-B, BL

φ 6,φ 810 - - - - - - - - - - - - - - - - - -

20 or more - - - - - -

φ 12 to φ 2510 - - - - - - - - - - - - - - - - - -20 - - - - - - - - - - - - - - - -

30 or more - -The table above also applies to combinations with option code D (with port on stopper) or T (steel stopper block (nitriding)).

SKL Mounted Cylinder LCR SeriesStopper model No. selection method

* For dimensions, etc., refer to "Pneumatic Cylinders II (Catalog No. CB-030SA)" Linear Slide Cylinder LCR Series.

6

SKL Mounted Cylinder (2)Linear Slide Cylinder LCG Series

How to order (φ 6 to φ 16)Without switch

With switch

LCG

LCG

8 40

40

S5

12 F2H* R A1DT

Model No.

Switch quantityDBore sizeA

Switch model No.*12

CStroke lengthB

OptionE

Precautions for model No. selection*1: To change the adjustable stroke range, use the discrete

stroke adjusting stopper in "Pneumatic Cylinders II (No. CB-030SA)".

*2: For the adjustable stroke range with a shock absorber stopper, refer to the stopper dimensions table in "Pneumatic Cylinders II (No. CB-030SA)".



*5: Combination of the stroke adjusting stopper and shock absorber stopper requires custom order.

*6: Can be selected for the type with stopper only.*7: A switch for buffer should be purchased separately.

Refer to how to order a switch in "Pneumatic Cylinders II (No. CB-030SA)".

*8: Refer to the selection table below for combinations of options.

*9: A1**, A2**, A5** and A6** of φ 6 to φ 8 with 10 mm stroke length or less, and φ 12 or φ 16 with 20 mm stroke length or less are custom order since adjustment is not possible with the standard stopper.

*10: When two switches are necessary for the type with S*** or A*** of φ 6 to φ 8 with 30 mm stroke length or less, select the F*H switch.

*11: The anti-rust type requires custom order.*12: The stroke adjusting stopper for working pressures of

0.3 MPa and higher is the metal touch type.

[Example of model No.]LCG-12-40-F2H-R-A1DT

LCG Double acting/single rod selection table(Combination with stroke adjusting stopper, shock absorber stopper) : Available - : Not available

The table above also applies to combinations with option code D (with port on stopper) or T (steel stopper block (nitriding)).

Model No. code Option code Stroke adjusting stopper Shock absorber stopperBore size Stroke S1 S2 S3 S4 S5 S6 A1 A2 A3 A4 A5 A6

LCGLCG -B, BL

φ 6, φ 8 10 - - - -20 or more

φ 12 to φ 25 10 to 20 - - - -30 or more

Code ContentBore size6 φ 68 φ 8

12 φ 1216 φ 16

Stroke length (mm)Bore size (φ)

6 8 12 1610 1020 2030 3040 4050 5075 75

100 100125 125




OptionBlank No option

S Stroke adjusting stopper 5 mm stroke adjustment on one side *1, *5, *8

S1** Stopper position (1) (can be changed to (4))St

oppe

r insta

llatio

n pos

ition


A Shock absorber stopper *2, *5, *8A1** Stopper position (1) (can be changed to (4))

Stop

per in

stalla

tion p

ositio

n

A2** Stopper position (2) (can be changed to (3))A3** Stopper position (3) (can be changed to (2))A4** Stopper position (4) (can be changed to (1))A5** Stopper position (1), (3)A6** Stopper position (2), (4)

** partBlank Port on the stopper: without port

D Port on stopper: side and bottom ports *3, *6Blank Stopper block material: steel

T Stopper block material: steel (nitriding) *6B With buffer *7, *8

B Without switch grooveBL With switch groove

Plug attachedBlank None

N With side piping port plug (not available for φ 6)


Radial lead wire Contact Voltage Indicator lamp Lead

LineBore size

AC DC φ 6 φ 8 φ 12 φ 16F2S*

Pro

xim

ity

1-color display

2-wireF3S* 3-wire

F2H* F2V* 2-wireF3H* F3V* 3-wire

F3PH* F3PV* 1-color display (PNP output) (custom order) 3-wire

F2YH* F2YV* 2-color display 2-wireF3YH* F3YV* 3-wireT0H* T0V* Reed 1-color display 2-wireT5H* T5V* No indicator lampT2H* T2V*

Pro

xim

ity

1-color display 2-wireT3H* T3V* 3-wire

T3PH* T3PV* 1-color display (PNP output) (custom order) 3-wire

T2WH* T2WV* 2-color display 2-wireT3WH* T3WV* 3-wire

A

B

C

D

E

Model: Linear slide cylinder Double acting/single rod LCGA Bore size : φ 12B Stroke : 40 mmC Switch model No. : Proximity/2-wire

Lead wire straightD Switch quantity : 1 (on rod side)E Other options : Shock absorber

Stopper position (1)With side and bottom portsMaterial, steel (nitriding)

Stopper position

2 4

1 3

7

How to order (φ 20, φ 25)Without switch

With switch

LCG

LCG

20 40

40

S5

20 T2H* R

U

UA1DT

Model No.

Switch quantityDBore sizeA

Switch model No.*12

CStroke lengthB

Anti-rust treatment

F

Precautions for model No. selection*1: To change the adjustable stroke range, use the

discrete stroke adjusting stopper in "Pneumatic Cylinders II (No. CB-030SA)".

*2: For the adjustable stroke range with a shock absorber stopper, refer to the stopper dimensions table in "Pneumatic Cylinders II (No. CB-030SA)".



*5: Combination of the stroke adjusting stopper and shock absorber stopper requires custom order.

*6: Can be selected for the type with stopper only.*7: A switch for buffer should be purchased separately.

Refer to how to order a switch in "Pneumatic Cylinders II (No. CB-030SA)".

*8: Refer to the selection table in "Pneumatic Cylinders II (No. CB-030SA)" for combinations of options.

*9: A1**, A2**, A5** and A6** with 20 mm stroke length or less require custom order since adjustment is not possible with the standard stopper.

*10: The table is alloy steel. To prevent rust, select "U" for an environment where the temperature and humidity is high or condensation may occur on the product surface.

*11: The stroke adjusting stopper for working pressures of 0.3 MPa and higher is the metal touch type.

[Example of model No.]LCG-20-40-T2H-R-A1DTModel: Linear slide cylinder Double acting/single rod LCGA Bore size : φ 20B Stroke : 40 mmC Switch model No. : Proximity/2-wire

Lead wire straightD Switch quantity : 1 (on rod side)E Other options : Shock absorber

Stopper position (1)With side and bottom portsMaterial, alloy steel (nitriding)

Stopper position

U: Anti-rust treated product (φ 20, 25)

The table and rail surface rustproofing reduces rust in high-humidity environments and near ionizers.The table and rail are black.

OptionE

Code ContentBore size

20 φ 2025 φ 25

Stroke length (mm)10 1020 2030 3040 4050 5075 75

100 100125 125150 150




OptionBlank No option

S Stroke adjusting stopper 5 mm stroke adjustment on one side *1, *5, *8S1** Stopper position (1) (can be changed to (4))

Stop

per in

stalla

tion p

ositio

n


A Shock absorber stopper *2, *5, *8A1** Stopper position (1) (can be changed to (4))

Stop

per in

stalla

tion p

ositio

n

A2** Stopper position (2) (can be changed to (3))A3** Stopper position (3) (can be changed to (2))A4** Stopper position (4) (can be changed to (1))A5** Stopper position (1), (3) A6** Stopper position (2), (4)

** partBlank Port on the stopper: without port

D Port on stopper: side and bottom ports *3, *6Blank Stopper block material: steel

T Stopper block material: steel (nitriding) *6B With buffer *7, *8

B Without switch grooveBL With switch groove

Plug attachedBlank None

N With side piping port plug (not available for φ 25)Anti-rust treatment

Blank NoneU Anti-rust treated product (guide only) *10

A

B

D

F

E


Radial lead wire Contact Voltage Indicator lamp Lead

wireAC DCT0H* T0V* Reed 1-color display 2-wireT5H* T5V* No indicator lampT2H* T2V*

Pro

xim

ity 1-color display 2-wireT3H* T3V* 3-wire

T3PH* T3PV* 1-color display (PNP output) (custom order) 3-wireT2WH* T2WV* 2-color display 2-wireT3WH* T3WV* 3-wire

C

SKL Mounted Cylinder LCG SeriesHow to order

* For dimensions, etc., refer to "Pneumatic Cylinders II (Catalog No. CB-030SA)" Linear Slide Cylinder LCG Series.

2 4

1 3

8

SKL Series

2 Make required conditions/descriptions clear to calculate energy

3 Calculate actual energy in accordance with the sample figure for the collision pattern

1 Clarify the colliding pattern of the device

Shock absorber selection guide

j. Collision due to free oscillating fallk. Colliding with torque of motor, etc., (oscillation)l. Colliding with torque of motor, etc., (rotation)

g. Collision due to free slidingh. Collision with cylinder thrust (downward)i. Collision with cylinder thrust (upward)

d. Collision due to free falle. Collision with cylinder thrust (downward)f. Collision with cylinder thrust (upward)

a. Simple horizontal collisionb. Collision with cylinder thrustc. Collision with drive force of motor

D = Diameter (m)N = Rotation speed (rpm)Me = Equivalent weight (kg)H = Drop height (m)T = Torque (N∙m)Td = Motor start torque (N∙m)K = Reduction ratioθ, α, β = Tilt angle (deg)

G = Position of center of gravityM = Colliding weight (kg)V = Colliding speed (m/s)S = SKL stroke (m)F = Pushing force: (N)g = Gravity acceleration 9.8 m/s2

ω = Angular speed (rad/s)J = Moment of inertia (kg∙m2)

E = All absorbed energy (J)E1 = Kinetic energy (J)E2 = Thrust/self-weight energy (J)L = Colliding object travel distance (m) (Slope free fall)R = Distance from center of rotation to

colliding point (m)r = Distance from center of rotation to

center of gravity (m)

Applications

Horizontal collision Vertical collisiona. Simple horizontal collision b. Pushing force of cylinder applied c. Pushing force of motor applied d. Free fall e. Cylinder lower limit stopper f. Cylinder upper limit stopper

Kinetic energy E1 (J)

Thrust/self-weight energy E2 (J)

Total absorbed energy E (J)

Equivalent weightMe (kg)

Applications

Slope collision Oscillation collision Rotation collisiong. Free fall h. Pushing force of cylinder applied i. When pushing force of cylinder applied j. Free fall k. Torque of motor, etc., applied L. Torque of motor, etc., applied

Kinetic energy E1 (J)

Thrust/self-weight energy E2 (J)

All absorbed energy E (J)


—∙M∙V2

(M∙g∙sinθ + F)∙S

E = E1 + E2

Me = —2∙EV2

12

—∙M∙V2

2∙—∙Td∙S

E = E1 + E2

Me = —

KD

2∙EV2

12

—∙M∙V2

(F - M∙g)∙S

E = E1 + E2

Me = —2∙EV2

12

—∙M∙V2

(M∙g + F)∙S

E = E1 + E2

Me = —2∙EV2

12

—∙M∙V2

F∙S

E = E1 + E2

Me = —2∙EV2

12

—∙M∙V2

———————

E = E1

Me = M

12

Me = — (V = 2∙g∙H)2∙EV2

—∙M∙V2

M∙g∙S

E = E1 + E2

12

Me = — (V = — —)3∙g∙H2

Rr

2∙EV2

M∙g∙H

—∙M∙g∙S

E = E1 + E2

rR

—∙M∙V2

M∙g∙S∙sinθ

E = E1 + E2

Me = — (V = 2∙g∙L∙sinθ)2∙EV2

12

— or —∙M∙V2

—∙S

E = E1 + E2

Me = — (V = ω∙R)

TR

12

J∙ω2

2

2∙EV2

— = —

—∙S

E = E1 + E2

TR

Me = — (V = ω∙R, ω = —)

M∙D2∙ω2

16J∙ω2

2

2π∙N60

2∙EV2

—∙M∙V2

(F - M∙g∙sinθ)∙S

E = E1 + E2

Me = —2∙EV2

12

Note: Refer to "Example of colliding pattern".

Calculate the E1 value according to "Example of colliding pattern".Calculate the value of E2 according to "Example of colliding pattern". For S (stroke length of SKL) in the formula, select a model whose max. absorbed energy exceeds E1, and use S for that model No.If after that the calculation result exceeds Emax (max. energy absorption), select one size larger SKL than the previously selected model No., and recalculate. If calculated E is lower than Emax selected model No., the selection is acceptable.

a. Kinetic energy ..................b. Thrust/self-weight energy ..

c. All absorbed energy .........

Explanation of code

E = All absorbed energy J

E1 = Kinetic energy J

E2 = Thrust/self-weight

energy J

Vertical motion

Horizontal motion

Slope motion

Oscillation/Rotationmotion

MD

Td

CYL MF

V

M

V

CYL F

M VCY

L F

M VH

M VV

ω

RT

MD

T

M

rR

R

βα

M

GH

θCYLF M

VCYL

F

θ

M

V

θ

M

Vr

9

SKL SeriesExample of selection/simplified selection graph

1. This is a simplified selection graph when mounted to a linear slide cylinder. The area inside the graph is the usable range.2. Simplified selection graph lists the pneumatic pressure value used for the cylinder at 0.5 MPa. 3. Simplified selection graph lists the value at normal temperature. 4. Conduct item 5 "Confirm specifications range" on the selection page.

Simplified selection graph

0

0.5

1

1.5

2

2.5

3

3.5

4

0 0.1 0.2 0.3 0.4 0.5 0.6 0 0.1 0.2 0.3 0.4 0.5 0.6

Collision speed V (m/s)

SKL-0804

0

5

10

15

20

Collision speed V (m/s)

SKL-1006

SKL-1208SKL-0805

M c

ollid

ing

obje

ct w

eigh

t (kg

)

M c

ollid

ing

obje

ct w

eigh

t (kg

)

4 Confirm the equivalent weighta. Calculate value of Me according to "Example of colliding pattern".b. Usable if Me is within Me range of selected model (calculated value of Me < specified value

of Me) according to calculation of Me (catalog value) and "a" for model No. selected at 3 .c. When exceeding the Me range of the selected model at b, select an SKL one size larger,

and check conditions in the same manner.Note: Equivalent mass corresponds to weight of workpiece, even for body moving with thrust,

etc., if it is assumed that all of them are kinetic energy only. This allows the load to be controlled at very low speed conditions.

5 Confirm shock absorber specifications range

Note: Value of allowable energy absorption may vary depending on colliding speed.

(°C)(s)

(cycles/min.)(m/s)

c. Ambient temperature d. Return time

a. Maximum repeating cycleb. Maximum colliding speed

0.1

1

10

100

1000

10000

0.01 0.1 1 10

V colliding speed (m/s)

Equivalent weight graph

SKL-1208

SKL-1006SKL-0805SKL-0804

Me:

Equ

ival

ent w

eigh

t (kg

)

Example of selection

2 Make the conditions/descriptions required to calculate the energy clear(Example)Colliding object weight: M = 1.0 kgColliding speed: V = 0.5 m/sPushing force: F = 70 NFrequency: 30 cycles/min.Ambient temperature: 23°CReturn time: 2s (time until re-collision)

3 Calculate actual energy in accordance with the sample figure for the collision pattern

E1 = —∙MV2 = — × 1 × 0.52 = 0.13 (J)12

12

Calculate E1

E2 = (Mg + F)∙S = (1 × 9.8 + 70) × 0.0035 = 0.28 (J)Tentatively select SKL-0804 from E1, then calculate E2

E2 = (Mg + F)∙S = (1 × 9.8 + 70) × 0.0045 = 0.36 (J)E = E1 + E2 = 0.13 + 0.36 = 0.49 (J)

Because it exceeds the allowable absorbed energy of SKL-0804, recalculate with SKL-0805, which is one size larger

Acceptable because it is less than the allowable absorbed energy of SKL-0805

4 Confirm the equivalent weight

Acceptable because it is less than the allowable value of SKL-0805Select SKL-0805

Me = — = — = 3.92 (kg)2 × 0.490.52

2EV2

1 Clarify the collision pattern of the device

Applications

Vertical collisione. Cylinder lower limit stopper

Kinetic energyE1 (J)

Thrust/self-weight energyE2 (J)

Total absorbed energyE (J)


E1 = —∙M∙V2

E2 = (Mg + F)∙S

E = E1 + E2

Me = —2∙EV2

12

CYL F

M

V

10

SKL Series

Design/selection

Mounting, installation and adjustment

1. Common

WARNING

CAUTION

Safety precautions

Use the product in the range of conditions specified for the product.If max. energy absorption in specifications is exceeded, damage or operation faults may occur. Note that the performance listed in the specifications cannot be exhibited if the products are not used with their full stroke length.

Read the precautions listed in the latest "Pneumatic Cylinders II (Catalog No. CB-030SA)" before use.

Check that the product withstands the working environment before use.

Use in conditions exceeding the operating ambient temperature range will negatively affect durability.

Do not use in any environment other than atmospheric pressure (vacuum, high pressure, etc.).

Confirm the collision conditions. Before use, obtain collision speed, collision object weight, thrust applied to the shock absorber and the number of collisions per minute.

(1) This will also be necessary during calculations for selection. In cases when the colliding speed is less than or equal to the specified range, the shock absorber cannot be expected to perform as well, since it will be more difficult for resistance to occur and the energy absorption will be smaller.

(2) This product may not be used if the number of collisions per minute exceeds the max. repetition frequency.

Check that the surface of the collision object contacted by the piston rod is hard enough.A high surface compression load will be applied to the contact surface of the piston rod of the collision object. The contact surface is to have a high degree of hardness (hardness rating of HRC 35 or above).

Take note of the returning force of the collision object.When using this product for conveyor drive, etc., it may be pressed back by internal spring force after energy is absorbed. For the returning force, refer to the field for the return spring force listed in the specifications.

Do not use 2 or more shock absorbers in a parallel arrangement as it will be difficult to synchronize the motion thereof. Absorb the impact with a single shock absorber having a large absorption energy. The max. repetition frequency will differ depending on the ambient temperature. The values provided in the specification descriptions are for use in room temperature (20°C). Note that the specification values will vary depending on the working temperature.

1. Common

DANGER

WARNING

Use with mounting parts of insufficient strength is prohibited.

Operating the unit with mounting parts of insufficient strength may cause damage to the master unit (mounting bracket) or lead to injuries.

Ensure that the strength of the mounting parts is at least the max. load multiplied by the safety rate.

A guide is required if the collision object vibrates.Install a secure guide on the collision object if the collision object vibrates or if force is applied to the piston rod at an axial right angle direction. When there is the risk of static electricity building up in an explosive environmentInstall a grounding device for releasing electrical charge and never use buffering surface materials that may create sparks. Dumping into fire is prohibited.Since there is oil inside, this product may explode or ignite if placed in fire.

Dispose of the oil according to prescribed methods for processing waste oil.

Do not apply a separate external load with a colliding object which has been stopped at the end of its stroke. Additional impact of the external load may lead to damage. Turn device power off and confirm the machine is stopped before installing, removing, or adjusting the stroke.

Do not use this product near fire or in devices or machines having an ambient temperature exceed-ing specifications.Flammable oil in the product poses the risk of fire.

Do not apply an eccentric load at a deflection angle of ±2.5° or more from the center line of the piston rod.

Collision of a load at a deflection angle of ±2.5° or more may cause defective return due to the piston rod becoming bent or deterioration of performance due to eccentric wear of the sliding portions.

Within 2.5°

11

SKL SeriesSafety precautions

Make sure the tightening torque of the installation nut is in accordance with the following table.

The shock absorber may be damaged if nut tightening torque exceeds the upper limit below.If the nut is to be securely tightened, use adhesives, etc., to ensure nut tightness.

If the rotating objects collide, or if deformation or wear is generated between the shock absorber and the collision object, place protective material before the collision surface to prevent deformation and wear.

Slip plate

Do not damage the piston rod sliding section or the threaded portion on the outer diameter of the damper case.Do not contact or sandwich objects between the piston rod sliding section and outer diameter of the damper case, or overly screw in fastening screws, etc., causing damage or dents. Scratches or dents on the sliding portion of the piston rod will cause damage of the packing, etc., and may lead to leakage of oil or defective operation. Scratches or dents on the threaded portion on the outer diameter of the damper case may make it impossible to install the unit on the base or lead to defective operation due to deformation of internal structuring parts.

Do not use in conditions where oil mist or water drops may contact the rod surface, or in areas with high levels of dust. Energy is not absorbed properly and faults may occur.

Installation outside of the tightening torque value is prohibited.

Installation outside of the tightening torque value may lead to damage of the master unit (mounting bracket).

Do not fix with screws that do not match the mounting holes. This may cause the product to collapse or become damaged.

If the device is stored with the rod pressed in, the performance of the air chamber may fall. Do not store pressed in.

CAUTION

WARNING

During Use & maintenance

Disassembly is prohibited. Do not disassemble the unit, as doing so may be dangerous.

CAUTION Careless oil dumping is prohibited.

Careless disposal of the oil in the shock absorbers will pollute the environment.

Dispose of the oil according to prescribed methods for processing waste oil.

Be careful of irregular vibrations as well as noises due to vibrations.

If the sound of collision or vibration becomes abnormally loud, replace the unit as it is possible that the service life has been reached. Continued use following such symptoms may lead to damage of the equipment to which the unit has been installed.

1. Common

Thread diameter (mm) M8 × 0.75 M10 × 1 M12 × 1

Nut tightening torque (N∙m) 1.2 to 2.0 3 to 4 5 to 6

(SKL Series)

12

Specifications are subject to change without notice. CKD Corporation 2017 All copy rights reserved. 2017.6

Head Office・Plant 2-250 Ouji, Komaki City, Aichi 485-8551 TEL(0568)77-1111 FAX(0568)77-1123 Sales And Marketing Div. 2-250 Ouji, Komaki City, Aichi 485-8551 TEL(0568)74-1303 FAX(0568)77-3410 Overseas Sales Administration dpt. 2-250 Ouji, Komaki City, Aichi 485-8551 TEL(0568)77-1338 FAX(0568)77-3461 Tokyo Branch Office 4F, Bunkahousou Media Plus, 1-31-1, Hamamatsu-cho, TEL(03)5402-3620 FAX(03)5402-0120

Minato-ku, Tokyo 105-0013 Nagoya Branch Office 2-250 Ouji, Komaki City, Aichi 485-8551 TEL(0568)74-1356 FAX(0568)75-1692 Osaka Branch Office 1-3-20, Tosabori, Nishi-ku, Osaka 550-0001 TEL(06)6459-5770 FAX(06)6446-1945

If the goods and/or their replicas, the technology and/or software found in this catalog are to be exported, law requires that the exporter makes sure that they will never be used for the development and/or manufacture of weapons for mass destruction.

SKL Series

Related productsCatalog No. CB-030SA

Catalog No. CB-030SA

Shock absorber/fixed NCK Series

Optimum for impact absorption of thrust and low speed energy Simple design, compact size Slit orifice achieves smooth stoppage Easy installation without adjuster due to a wide suction range Choose a maximum absorbed energy from 1 J to 200 J

Shock absorber/adjustable FCK Series

Three types available: low speed (1 m/s), medium speed (2 m/s) and high speed (3 m/s) Choose from three orifice types to suit conditions: single hole, porous irregular and porous Usable in a wide range of temperatures, from 5°C to 70°C Optimal capacity adjustment due to adjuster Choose from a wide range of maximum absorbed energy, from 1.5 J to 720 J

Date post:	16-Apr-2018
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