Linear bearing is a linear motion system, which is used for the combination of linear stroke and cylindrical shaft. Because of the contact between the bearing ball and the outer point of the bearing, the steel ball rolls with the minimum friction resistance, so the linear bearing has small friction and is stable, and does not change with the bearing speed, so the linear motion with high sensitivity and high precision can be obtained. 
Feature of linear motion bearing :
(1)Linear motion bearing is a kind of low-cost metal for producing linear motion system, which is used for infinite stroke cylindrical shaft.. Because point contact ball bearing with shaft, so using the load is small.  
 
(2) the flange linear bearing can be divided into: round flange type, method type, elliptical flange type, guided round flange, guiding method, guide the elliptical flange type, extended round flange type.

(3)According to the specification is divided into two series of LM and LME series. Its code LM series used in Asia,  Japan, South Korea, China, etc.On the basis of metric size, with straight axis diameter tolerance is usually h7.LME series used in Europe, the United States, Germany, Italy and other regions.On the basis of inch size. Also have metric size, with the straight axis diameter tolerance is usually g6.The two series of structural features are basically the same except for different sizes and tolerances.

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