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.
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.
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.
Use of an outer rail with a U-shaped cross section increases the rigidity against a moment and torsion.
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:
Model KR basic load ratings are equal in all four directions.
Model KR is equipped with end seals and side seals for dust prevention as standard.
Model |
Frame Size |
Options |
Ball Screw |
Stroke |
Lead |
Max. Input |
Max. Input |
20 x 40 |
Covered Type | Normal, High Accuracy and Precision |
30, 80, 130 |
1 |
0.207 |
6000 |
|
26 x 50 |
Covered Type | Normal, High Accuracy and Precision |
60, 110, 160, 210 |
2 |
0.622 |
6000 |
|
33 x 60 |
Covered Type | Normal or |
50, 100, 200, 300, |
6 or 10 |
1.244 |
4700 |
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