Linear Actuators > THK Linear Slides - KR Series

THK Linear Actuators - KR Series

THK Linear Slides - KR Series

The THK KR Series linear slide consists of a highly rigid outer rail with a U-shaped cross section, LM Guide units on both sides and a Ball Screw unit in the center.

High Rigidity, Compact and Space Saving Linear Slide
Normal, High Accuracy or Precision types
30 mm up to 600 mm Stoke Lengths
Motor, Driver, Coupling, Flange, Sensors available

Linear Actuator Lineup

Model	Frame Size (mm)	Options	Ball Screw Grade	Stroke (mm)	Lead (mm)	Max. Input Torque (N·m)	Max. Input Speed (r/min)
KR20 Type Linear Slide	20 x 40	Covered Type	Normal, High Accuracy and Precision	30, 80, 130	1	0.207	6000
KR26 Type Linear Slide	26 x 50	Covered Type	Normal, High Accuracy and Precision	60, 110, 160, 210	2	0.622	6000
KR33 Type Linear Slide	33 x 60	Covered Type	Normal or High Accuracy	50, 100, 200, 300, 400, 500, 600	6 or 10	1.244	4700

Model

Frame Size
(mm)

Options

Ball Screw
Grade

Stroke
(mm)

Lead
(mm)

Max. Input
Torque (N·m)

Max. Input
Speed (r/min)

KR20 Type
Linear Slide

20 x 40

Covered Type

Normal, High Accuracy and Precision

30, 80, 130

0.207

6000

KR26 Type
Linear Slide

26 x 50

Covered Type

Normal, High Accuracy and Precision

60, 110, 160, 210

0.622

6000

KR33 Type
Linear Slide

33 x 60

Covered Type

Normal or
High Accuracy

50, 100, 200, 300,
400, 500, 600

6 or 10

1.244

4700

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Product Features
Motors & Sensors
Downloads & Reference

LM Guide Actuators

Construction

Because of its integral-structure inner block consisting of a highly rigid outer rail with a U-shaped cross section, LM Guide units on both side faces and a Ball Screw unit in the center, LM Guide Actuator model KR achieves a highly rigid and highly accurate actuator in a minimal space. In addition, since the housings A and B also serve as support units and the inner block as a table, this model allows significant reduction of man-hours required for design and assembly, thus contributing to total cost cutting.

4-way Equal Load

Each row of balls is arranged at a contact angle of 45° so that the rated load on the inner block is uniform under loads applied to the inner block in the four directions (radial, reverse radial and lateral directions). As a result, model KR can be used in any mounting orientation.

Equal Load

High Rigidity

Use of an outer rail with a U-shaped cross section increases the rigidity against a moment and torsion.

High Rigidity

High Accuracy

Since the linear guide section consists of 4 rows of circular-arc grooves that enable balls to smoothly move even under a preload, a highly rigid guide with no clearance is achieved. Additionally, variation in frictional resistance caused by load fluctuation is minimized, allowing the system to follow highly accurate feed.

3 Types of Accuracy Grades Available: