THK LM Guide, Instruction Manual

3-1

3. Marking and 

Combined Use

LM Guide

3.  

Marking on the Master Rail and Combined Use

3-1

Marking on the Master LM Guide

All LM rails mounted on the same plane are 

marked with the same serial number. The 

LM rail marked with "KB" after the serial 

number is the master LM rail. The LM block 

on the master LM rail has its reference 

surface finished to a designated precision, 

allowing it to serve as the positioning 

reference for tables. (See Figure 3-1.)

LM Guides of normal grade are not marked 

with "KB." Therefore, any one of the LM rails 

having the same serial number can be used 

as the master LM rail.

3-2. 

Marking on the Reference Surface

In the LM Guide, the reference surface of 

the LM block is opposite the surface marked 

with the THK logo, and the reference surface 

of the LM rail is on the surface marked with 

a line, as shown in Figure 3-2. If usage 

requires reversing the relative positioning of 

the reference surfaces of the LM rail and 

block, or if the grease nipple must be 

oriented in the opposite direction, specify it.

Figure 3-1 Master and Subsidiary LM Guides 

(For Example, Model HSR-B)

Master LM Guide

Subsidiary LM Guide

Master rail mark

Serial number

Y2F123 KB

Figure 3-2 Markings on the Reference Surface

Reference surface

Reference 

surface

Line mark

Reference surface

Line mark

THK mark

THK mark

Master LM Guide

Subsidiary LM Guide