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Linear guide rail, also called line linear guide rail, slide, linear slide rail, suitable for linear reciprocating motion occasions, have higher than linear bearing rated load, but also the bearing certain torque, can be in high load cases realize high precision linear motion. Linear motion guide function is used to support and guide moving parts, according to the given direction do reciprocating linear motion. According to press the friction properties and decide, linear motion guide can be divided into sliding friction guide, the rolling friction is guide, elastic friction slideway, fluid friction guide categories. Mainly used in othermeasuring linear bearing on automation machinery imported from Germany, much like the machine, paper bowl machine, laser welding machine, etc, of course, linear bearing and straight spools is the kit with. Like linear guide is mainly used in precision mechanical structure of the demand is higher,