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THK KR

THK mode KR realizes high-rigidity, high-precision intelligent combination unit function with minimal space through the high-rigid u-shaped lateral track and the LM rolling guide part on both sides and the central ball screw part.

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Product Details

THK KR

THK KR series

Compact series actuator KR/SKR

Japanese THK module double slider KR45 module KR45H10B-0190

THK mode KR realizes high-rigidity, high-precision intelligent combination unit function with minimal space through the high-rigid u-shaped lateral track and the LM rolling guide part on both sides and the central ball screw part.

In addition, as the supporting seats A and B can also double as supporting units, the inner sliding block can double as working table, which can significantly reduce the time required for design and assembly, thus reducing the overall cost


4 direction equal load

In order to make the slider on the four direction (radial, the radial and lateral) have the same rated load, the columns ball is designed to be contact Angle 45 °, so any position can be used


High rigidity

The use of a u-shaped profile on the outside of the orbit enhances the rigidity of torque and torsion.


High precision

The linear guide part is composed of four rows of arc grooves that can move briskly even under the preloading state, and can realize high-rigid guide without gap. In addition, the change of friction resistance caused by load change is controlled to the minimum, which can meet the need of high-precision feed


Save a space

By combining the LM rolling guide part on two sides with the ball screw part in the center of the inner slider, the KR module achieves the intelligent combination unit function of high rigidity and accuracy in the minimum space.

Sealing gasket

The KR THK module standard is equipped with a dustproof end seal gasket and side seal gasket


THK SKR series

Japanese THK module SKR ball retainer combined unit SKR2606b-0145

The ball retainer LM intelligent combination unit SKR is a small intelligent combination unit. Inside the outer track in the shape of its u-shaped section, there are inner sliders made by combining LM sliders and nuts.

In addition, the ball retainer is used in the guide part and ball screw part. Compared with the traditional KR, it can achieve high speed, low noise and long-term maintenance. (SKR20 and 26 adopt ball retainer only in the guide part and install the lubrication device QZ in the ball screw part.)


4 direction equal load

In order to make the slider on the four direction (radial, the radial and lateral) have the same rated load, the columns contact Angle of ball is designed to 45 °, so any position can be used.


High rigidity

The rigidity of torsion and torsion is enhanced by using a u-shaped track

High precision

The linear guide part is composed of 4 rows of circular arc channels which can move briskly even under the condition of preloading. In addition, the change of friction resistance caused by load change is controlled to the minimum, which can meet the need of high-precision feed.

Save a space

By combining the LM rolling guide part on two sides of the inner slider with the ball screw part on the center part of the inner slider, SKR type can achieve the intelligent combination unit function of high rigidity and high accuracy in the minimum space.

The mounting surface of this product shall be machined surface or a plane equivalent to its precision, otherwise it may cause poor performance and short service life. In addition, should be installed on the rigid enough base.


*It should be used within the travel range

In particular, with a soft telescopic dustproof cover, due to the short journey, please pay attention

*For the parts installed on the inner sliding block or auxiliary working table of this product, attention should be paid to prevent any conflict with other parts near the end of the travel.


Note: When KR33 type with the outer cover, the top surface of the mounting bolt of the outer cover will be higher than the surface of the auxiliary working table.

Please pay attention to this when designing the parts installed on the auxiliary worktable. Please refer to image 3.


*The KR is designed with a soft retractable dust shield that cannot be used in an inverted position

*Please consult THK about SKR type with soft expansion dust cover.

*When using the product with the outer cover in a non-horizontal (inverted or wall-mounted) position, the parts installed on the auxiliary worktable may touch the outer cover due to the deflection of the outer cover, please take note.

*With the housing, the housing is installed with a small countersunk head screw. It is possible to damage the head of the screw when installing and removing the outer cover. Please pay attention to the operation. The same as above with soft telescopic dust shield

Before operation, make sure that no tools, bolts, etc are left in the product

*The blocks installed at both ends of the product stroke are not used for positioning. Do not use for positioning

*Please wipe the product carefully before operation. After trial run, please add grease before using

 

The following grease has been sealed in the standard product

・KR15: THK AFF  Grease

・KR20、26  SKR20、26: THK AFA  Grease

・KR30H~65  SKR33、46: THK AFB-LF  Grease


Note: Standard SKR type products without grease nozzles, apply grease directly to the rolling surface.

*The photoelectric miniature sensor is not made of waterproof and dustproof construction. Do not use in places where there is a lot of dust or oil mist, or where water, oil, chemicals are directly or indirectly splashed.


For additional details, see the sensor manufacturer's product catalog.


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