What Is Rail

Guide rail: A groove or ridge made of metal or other materials that can bear, fix, guide and reduce friction of moving devices or equipment. Longitudinal grooves or ridges on the surface of a rail used to guide and secure machine parts, special equipment, instruments, etc. 

Guide rails, also known as slide rails, linear guide rails, and linear slide rails, are used in linear reciprocating motion occasions. They have a higher rated load than linear bearings, and can bear a certain torque at the same time, and can achieve high-precision linear motion under high load conditions. .