CATALOG No.320E

VLALow Price ActuatorNEW

1

Low Price ActuaTwo types of actuator are available.

Actuator Model VLA is offered in two types. You can select either type according to yourservice conditions.

Structural drawing of Model VLA-ST

Slider Type: Model VLA-ST

QZ Lubricator

Ball screw

Stainless steel cover

Slider

AC servomotor* Note

Caged Ball LM Guide model SRS

Structural drawing of Model VLA-CT

Cylinder Type: Model VLA-CT

Laminated Contact Scraper LaCS*3

Rod

Ball screw

QZ Lubricator

AC servomotor* Note

Note) Ac servomotors are not included in VLA actuator.Installation of the Motor need to be performed by customer.

2

VLAator ModelFeatures of Model VLA

●Low Price with Simple StructureSince model VLA uses an LM Guide as the direct

base of the actuator unit and has fewer

components, a simple structure, small weight and

compact design are achieved. As a result, a low

price actuator is realized.

●Long-term Maintenance-free OperationLightweight, compact type LM Guide model SRS*1,

which provides a significantly high performance

through adoption of ball cages, is used in the linear

motion guide unit. In addition, the ball screw unit

is attached with QZ Lubricator*2, which is capable

of minimum and optimal lubrication. As a result,

long-term maintenance-free operation is achieved.

●Eco-friendly and Highly Energy-efficientBy replacing a conventional air cylinder with

Motored Actuator model VLA, the customer can

eliminate exhaust noise and achieve high energy-

efficiency and energy saving without contaminating

the environment with lubrication oil mist.

●ProductivitySeveral manufacturers of motors can be assem-

bled without additional flange according to your

control specifications.

●A Motor of a Different Manufacturer MountableYou can choose an AC servomotor to mount on

the actuator from several manufacturers according

to your control specifications.Note: Mountable motors may be limited depending on the dimensions and the

capacity. See page 13-14 for details.

*2: QZ Lubricator

1) Substantially extended maintenance intervalWith ordinary grease lubrication for a ball screw, slight amountof oil is lost as the ball screw travels. Attaching QZ Lubricatorsupplements oil loss over a long period and allows themaintenance intervals to be significantly extended.

2) Eco-friendly lubrication systemQZ Lubricator feeds the right amount of oil to the right locationwith a high density fiber net, making itself an eco-friendlylubrication system that dose not waste oil.

Sealed casing Nut

High density fiber netOil controlling fiber net

Highly oil-impregnated fiber net

Flow of lubricant

Screw shaft

Applied directly to the raceway

*1: Caged Ball LM Guide model SRSLM rail

LM block

BallBall cage

Endplate

End seal

Side seal

*3: Laminated Contact Scraper LaCS

With a laminated contact structure (2-layer scraper), LaCSremoves minute foreign matter adhering to the LM rail inmultiple stages to prevent it from entering the LM block.

Low noise, acceptable running sound- Since 2-layer scrapers are in full contact with the LM rail,LaCS is highly capable of removing minute foreign matter.- Use of oil-impregnated expanded synthetic rubber with aself-lubricating capability achieves a low frictional resistance.

Contact scraper

Liquid

Large amount offoreign matter

With model SRS, use of ball cages eliminates frictionbetween balls and allows the following effects to beobtained.

1) Low noise, acceptable running sound 4) Excellent smoothness2) Long-term maintenance-free operation 5) Low dust generation3) High-speed response, long service life

3

●Example of the actuator’s model number coding

Model VLA-ST

●Model VLA-ST Specifications

➀ Model number

➁ Type: ST

➂ Classification in main unit size45: 45-mm height60: 60-mm height

➃ Ball screw lead06: 6 mm12: 12 mm

➄ StrokeE.g., 0050: 50 mm

0200: 200 mm

➅ Type (mounting method)N: no motor

➆ Motor wattage000: no motor

➇ Motor encoder specificationsN: no motor

➈ Motor lead line directionN: no motor

➉ OptionN: no option

Mb

Ma

Mc

Model No. UnitST-45 (30W) ST-60 (50W) ST-60 (100W)

High speed type Medium speed type High speed type Medium speed type High speed type Medium speed typeRated speed mm/s 600 300 600 300 600 300

Maximum speed mm/s

Stroke: 300 or less 1000 500 1000 500 1000 500Stroke: 350 1000 500 800 400 800 400Stroke: 400 1000 500 800 400 800 400Stroke: 450 840 420 800 400 800 400Stroke: 500 680 340 800 400 800 400Stroke: 550 800 400 800 400Stroke: 600 680 340 680 340

Rated thrust N 40 80 67 133 134 267Maximum thrust N 117 235 201 402 398 796Maximum acceleration G 0.3Horizontal mass capacity kg 5 10 8 16 16 30Vertical mass capacity kg 1.5 3 2.5 5 5 10Ball screw shaft diameter mm 8 12Ball screw lead mm 12 6 12 6 12 6Motor wattage *Note 2 W 30 50 100Motor rated torque *Note 2 N•m 0.095 0.159 0.319Positioning repeatability mm ±0.020Backlash mm 0.1Permissible moment N•m Ma=Mb=12 Mc=31 Ma=Mb=25.7 Mc=58Service life in distance traveled (note 1) km 5000

Note 1: The value applies when the actuator receives a load and operates at the rated speed and acceleration of 0.3 GNote 2: The specifications apply to the actuator mounted with each size of a standard motor in page 13. If a different motor is used, the actuator's

specifications are different. Also note that the rated values of the actuator unit must not be exceeded.

Stroke: 700 500 250 500 250

4

●Outline Drawing of Model VLA-ST-45

L2

L1

n x 100

st2

(0.8)25

45

14

4524

D

42322620

3645 R5

30

1004-4.5 drilled through

81st1

50

D

1029

10 4-M4 depth 7.5 38

9

25

R5 9.54.5

4.5 36

14.5

2 x N-M4 depth 819

10

12

6.52-slotted hole through

D-D cross section

From rear face

Dimensional Table Unit : mm

Stroke Effectivestroke

Mechanical strokest1+st2 L1 L2 n N

0050 50 60 206 151 1 20100 100 110 256 201 2 30150 150 160 306 251 2 30200 200 210 356 301 3 40250 250 260 406 351 3 40300 300 310 456 401 4 50350 350 360 506 451 4 50400 400 410 556 501 5 60450 450 460 606 551 5 60500 500 510 656 601 6 7

Mass (kg)

0.830.941.051.151.261.371.481.591.701.81

5

●Outline Drawing of Model VLA-ST-60

526

(0.8)

6032

D-D cross section

254264

50393123

50

5.5 12 52

33

st2

D

100n x 100

st1 110

D

35

16

2 x N-M5 depth 9

7.5

L1

12

L2

124-5.5 drilled through 1235

60

4-M5 depth 10

14

2-slotted hole through6

R6R6

From rear face

60

Dimensional Table Unit : mm

Stroke Effectivestroke

Mechanical strokest1+st2 L1 L2 n Mass (kg)

0050 50 60 237 171 1 1.870100 100 110 287 221 2 2.070150 150 160 337 271 2 2.280200 200 210 387 321 3 2.480250 250 260 437 371 3 2.680300 300 310 487 421 4 2.890350 350 360 537 471 4 3.090400 400 410 587 521 5 3.30

0550 550 560 737 671 6 3.910600 600 610 787 721 7 4.11

0450 450 460 637 571 5 3.500500 500 510 687 621 6 3.70

N

233445566778

0700 700 710 887 821 8 9 4.52

6

Item CT-35 (30W) CT-45 (50W)

600 600 600 (470 with 300-stroke type)

Rated thrust 40 67 134

Maximum thrust N 120 201 402

kg 4 7 25

kg 1.9 3.1 6.5

mm 12

mm ±0.020

mm 8 12

W 30 50 100

Motor rated torque *Note 5 0.095 0.158 0.319

Rod diameter

Stroke 50/100/150 50/100/150/200 50/100/150/200/250/300

Service life in distance traveled (note 4)

Unit CT-55 (100W)

Rated speed (note 1) mm/s

N

Horizontal mass capacity (note 2, 3)

Vertical mass capacity (note 3)

Ball screw lead

Positioning repeatability

Ball screw shaft diameter

Motor wattage *Note 5

N•m

mm φ16 φ20 φ25

mm

km 5000

Note 1: With the 300-stroke type of CT55, the rated speed is 470 mm/s as calculated from the critical speed of the ball screw. If the stroke is shorter, theactuator can be operated at 1,000 mm/s at a maximum. However, the service life may be shortened.

Note 2: Model CT is capable of receiving only an axial load. The horizontal mass capacity is the value when an LM Guide is also used and no axial load isapplied to the rod. When making a selection, take into account the sliding resistance of the LM Guide. For specific sliding resistances of LM Guides,see the general catalog.

Note 3: The values apply at acceleration of 0.3 G.Note 4: The value applies when the actuator receives a load and operates at the rated speed and acceleration of 0.3 G.Note 5: The specifications apply to the actuator mounted with each size of a standard motor in page 13. If a different motor is used, the actuator's

specifications are different. Also note that the rated values of the actuator unit must not be exceeded.

●Example of the actuator's model number coding

Model VLA-CT

●Model VLA-CT Specifications

➀ Model number

➁ Type: CT

➂ Classification in main unit size35: 35-mm width45: 45-mm width55: 55-mm width

➃ Ball screw lead12: 12 mm

➄ StrokeE.g., 0050: 50 mm

0200: 200 mm

➅ Type (mounting method)N: no motor

➆ Motor wattage000: no motor

➇ Motor encoder specificationsN: no motor

➈ Motor lead line directionN: no motor

➉ OptionN: no option

7

●Outline Drawing of Model VLA-CT-35

L1

41

K-M3 depth 4

H x 50=J

2550

16.5

Ball screw greasing hole(15)

5

Provided nut dimensions

13 M8 x 1.25

11

38.5

Effective stroke: S

21

(0.5)

18

81.5

7.5 (width across flat point)

Ball screw lubrication position73 or longer

Zero position

(37.5)

(5)

φ16

M8 X 1.25

10

PCD

2935

4-M3 depth 10

11

(90° equidistant)

(5)

Dimensional Table Unit : mm

Stroke Effective stroke L1 H K Mass (kg)0050 50 161 2 6 0.70100 100 211 3 8 0.90150 150 261 4 10 1.0

J100150200

8

●Outline Drawing of Model VLA-CT-45

5.5

Square nut (provided)dimensions

3.51.5

5.8

3.3

Detail view of D

2.4

L1

A

Angle A

16.5

T groove for M3 (8 grooves)

(7.8) 17

(19.6)M3 x 0.5

Provided nut dimensions

6 M10 x 1.25

D

45°

Ball screw greasing hole(5)Effective stroke: S(42.5)

Ball screw lubrication position75 or longer

Zero position

PCD53

452514

45 1425

M10 x 1.25

8.5 (width across flat point)229

1.5

10

φ20

(5)

(90° equidistant)4-M4 depth 10

Dimensional Table Unit : mm

Stroke Effective stroke L1 Mass (kg)0050 50 162.5 1.10100 100 212.5 1.40150 150 262.5 1.60200 200 312.5 1.9

9

●Outline Drawing of Model VLA-CT-55

45°

PCD65

55

M12 x 1.25

L1

Square nut (provided)dimensions

Provided nut dimensions

M4 x 0.7

(9.9)

3.27

16.5

7

(21.9)

19

1.5

Detail view of D

4.5

7.3

4.3

D T groove for M4 (8 grooves)

Effective stroke: S

55

17

Ball screw greasing hole (5)(45.5)

Ball screw lubrication position83 or longer

30

Zero position

9.5 (width across flat point)2410

1.510

φ25

M12 x 1.25

(5)

3017

(90° equidistant)4-M5 depth 12

Angle A

A

Dimensional Table Unit : mm

Stroke Effective stroke L1 Mass (kg)0050 50 183 1.70100 100 233 2.10150 150 283 2.50200 200 333 2.80250 250 383 3.20300 300 433 3.6

10

●Options for Model VLA-CT

45 55

8M3

38.5

4

46.5

12

35

φ5

CT-35

M3

4

15

45

1045 55

57 67

φ6

CT-45

Bracket Base

11

M4

5

1255

67

68 80

20

φ7

CT-55

12

Flange

107085

40 54.5

5555

4545

57689

44.5

33

38.5

35

45

φ5 M3

M6 φ6

M5 φ7

557

24 34

CT-35

CT-45

CT-55

13

●Specifications of Mountable Motors

With model VLA, any of the motors indicated in the table below can be mounted without an intermediateflange.* For details of the motor mounting area, see the corresponding drawing page 14.* For the specifications and options of a motor of a particular manufacturer, see the manufacturer’s

catalog and select and purchase one.

Motor model numberAvailable actuator

Model ST Model CT

FanucβM0.2

ST-60

CT-45

βM0.3 CT-55

Yaskawa

Electric

Σ-IIISGMAS-A5

SGMAS-01 CT-55

Σ-II

SGMAH-A3 ST-45

SGMAH-A5

ST-60

SGMAH-01 CT-55

Mitsubishi

Electric

HC-MFS053 CT-45

HC-MFS13 CT-55

HC-KFS053 CT-45

HC-KFS13 CT-55

HC-PQ033 ST-45 CT-35

HC-PQ053ST-60

CT-45

HC-PQ13 CT-55

Sanyo Electric

P30B04003 ST-45

P30B04005ST-60

CT-45

P30B04010 CT-55

Omron

R88M-W03030 ST-45

R88M-W05030ST-60

R88M-W10030 CT-55

R88M-U03030 ST-45

R88M-U05030ST-60

R88M-U10030 CT-55

* Installation of the motor and the adjustment of the driver need to be performed by the customer.* An OT sensor, origin sensor and their dogs cannot be attached inside the actuator unit. The customer

must prepare and install an OT sensor, origin sensor and their dogs outside the actuator as necessary.

14

ST-45 9 27 3 φ5 φ22 φ30 PCD46 4-M4 depth 830 PCD46ST-60 φ30φ288 3 4-M4 depth 8φ6

A B C D E F G H

C EPCD46

D

2-M4 depth 12

F G

φ8 φ31 PCD46CT-45

A BCT-35 φ3127.5 7 2-M4 depth 12φ8

φ32φ8 4-M4 depth 12PCD46CT-55 3.5

3.53.5 7

727.528.5

Hexagon socket bolt M2.5 Hexagon socket screw M4 X 4LH I

Hexagon socket bolt M2.5 Hexagon socket screw M4 X 4LHexagon socket bolt M2.5 Hexagon socket screw M4 X 4L

DEF

C

B A

G

H

Low-head screw

Steel tape

C

AB

DE

F

H

G

45˚

I

* When mounting the coupling, re-move the low-head screws and the steel tape.When reattaching the steel tape, be sure not to bend the tape.

* When mounting the motor, remove the lid from the hole (hexagon socket screw “I”).Move the rod back and forth to align the hexagon socket bolt with the hole position.

Model VLA-ST

Model VLA-CT

20041205 Printed in Japan

Low Price Actuator Model VLA

Precautions on Use●Handling

• When using the actuator, carefully read and fully understand the “Instructions Manual for Low Price Actuator Model VLA,” and be sure to observe theprecautions on use.

• Dropping or hitting the product may damage it. Take much care in handling the product.• Disassembling the product may cause entrance of foreign matter or deterioration of accuracy. Do not disassemble the product unless it is inevitable.

●Installation SiteDo not install the actuator and the driver in the following places.• Where ambient temperature is out of the 0 to 40˚C range, ambient humidity is out of the 20 to 80% RH range, condensation occurs, or corrosive gas

or flammable gas is produced.• Where dielectric powders such as iron powder, dust, oil mist, cutting fluid, water, salt or organic solvent is produced or flies.• Where the product may be exposed to direct sunlight or radiant heat.• Where strong electric field or strong magnetic field is generated.• Where vibrations or impacts transmit.• Where inspection or cleaning is difficult to perform.

●Actuator Mounting Surface• The actuator must be mounted on a machined plane or on a plane with accuracy equivalent to that of a machined plane. The flatness of the

mounting surface must be within 0.1 mm.

●Instructions Manual• The “Instructions Manual for Low Price Actuator Model VLA” can be downloaded from ’s homepage.

URL: http://thk.co.jp/• The CAD data of the actuator can be downloaded from the Technical Support Site of .

Technical Support Site: http://www.lmsystem.com/

●Safety Precautions• Never touch the moving member of the actuator while it is energized.• Do not enter the operating range of the actuator when it is operating or operable.• When installing, adjusting, inspecting or maintaining the actuator, driver or related equipment connected to either of them, be sure to disconnect all

power plugs from outlets, and lock them or prepare safety plugs in order to prevent non-operators from turning the power. Additionally, place a noticeindicating that the product is in operation in a place where it is easily visible.

• When two or more persons operate the actuator, confirm the steps, signs and anomaly handling in advance, and have another person observe theoperation.

• Thoroughly read the JIS standard “General Safety Rule for Industrial Robots” (JISB8433) and the Ministry of Health, Labor and Welfare’s “Ordinanceon Labor Safety and Hygiene” before operating the product, and strictly observe these rules when operating the product.

• Carefully read and fully understand the “Instructions Manual for Low Price Actuator Model VLA,” and be sure to observe the precautions on safety.

All rights reserved.

HEAD OFFICE 3-11-6, NISHI-GOTANDA, SHINAGAWA-KU, TOKYO 141-8503 JAPAN ASIA PASEFIC SALES DEPARTMENT PHONE:(03)5434-0351 FAX:(03)5434-0353

●“LM Guide”, “Ball Cage”, “ ” and “QZ” are the registered trademarks of THK Co., Ltd.●The photo may differ slightly in appearance from the actual product.●The appearance and specifications of the product are subject to change without notice. Contact THK before placing an order.●Although great care has been taken in the production of this catalog, THK will not take any responsibility for damage resulting from typographical errors or omissions.●For the export of our products or technologies and for the sale for exports, THK in principle complies with the foreign exchange law and the Foreign Exchange and

Foreign Trade Control Law as well as other relevant laws.For export of THK products as single items, contact THK in advance.

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