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THK Linear Rail System

The LM Guide (Linear Motion Guide) is our main product, incorporating a part with a linear rolling motion into practical usage for the first time in the world. It realizes the development of high-precision, high-rigidity, energy-saving, high-speed machines with long service lives.

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Product Details

THK Linear Rail System

The LM Guide (Linear Motion Guide) is our main product, incorporating a part with a linear rolling motion into practical usage for the first time in the world. It realizes the development of high-precision, high-rigidity, energy-saving, high-speed machines with long service lives.

We provide a standard LM guide of a wide range of types and sizes so that you can choose the best product for any application. With the unit structure of each model, high operating accuracy can be easily obtained by installing the product on the flat surface with bolts without any gap. In the widespread use of the LM guide, we have solid records and expertise.


[Service environment]

When using the LM system, you need to provide effective lubrication. Without lubrication, rolling element or raceway wear is faster and service life is shortened. The function of lubricant is as follows:

(1) Minimize friction on moving parts to prevent sticking and wear.

(2) An oil film is formed on the roll path to reduce the stress on the surface and prolong the rolling fatigue life.

(3)Cover the metal surface to prevent rust from forming.

To fully play the role of the LM guide rail, lubrication needs to be provided on a case-by-case basis.

If the installation direction is not horizontal, the lubricant may not reach the raceway completely.

Make sure THK knows the installation direction and the exact location of each LM module, where the choke or pipe joint should be connected. The installation direction of the LM guide is shown in a1-12. For lubrication, see a24-2. Even with a sealed LM guide, the internal lubricant oozes out gradually during operation. Therefore, the system needs to be lubricated at appropriate intervals according to the conditions of use.


Corrosion Prevention

Determining a Material

Any LM system needs materials that meet environmental requirements. For environments that require corrosion resistance, some LM system models can use martensite stainless steel.


Surface Treatment

The surfaces of the LMS track and shaft can be used for corrosion or aesthetic purposes. THK provides thk-ap processing, which is the best surface treatment for the LM system. There are roughly three types of thk-ap treatment: AP-HC, AP-C, and AP-CF. 


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