Linear bearing is a low-cost production of linear motion system for unlimited travel in conjunction with the cylinder axis. As was carrying the ball point contact with the shaft, so the use of load is small. With minimal friction resistance ball rotation, it can obtain high-precision smooth movement.

Linear bearings are divided into two series of the LM and LME. The symbol LM series is used for Asia, Southeast Asia, Japan, Korea and China. LME Linear Bearing series is used for Europe, the United States, Germany, Italy and other regions. Two series of structural features, in addition to different dimensions, tolerance of different diameter, the structure is of roughly the same.