A global standard size LM Guide in which each row of balls is placed at a contact angle of 45° so that the rated loads applied to the LM block are uniform in the four directions (radial, reverse-radial, and lateral directions), enabling the LM Guide to be used in all orientations.
The G dimension is crucial for the proper functioning of THK linear guides, particularly the LM Guide. It is defined as the distance from the end of the LM guide rail to the centre of the first mounting hole. This dimension is essential for ensuring that the guide rail is correctly positioned and that the assembly can be properly mounted. The G dimension is always located on the left side of the rail, with the datum line away from the user. It is important to specify the G dimension for both ends of the LM guide rail when ordering to avoid any issues during installation and operation.