Bearing description：
A groove or ridge of metal or other material that supports, holds, guides, and reduces friction in a moving device or device. A longitudinal groove or ridge on the surface of a guide rail used for guiding, securing machine parts, special equipment, instruments, etc. Guide rail, also known as sliding rail, linear guide rail, linear sliding rail, used for linear reciprocating motion occasions, has a higher load rating than linear bearings, while can bear a certain torque, can achieve high precision linear motion under high load.
Protection of guide rail:
The protection of guide rail can prevent or reduce the wear of guide pair and prolong the life of guide rail. Protective devices are produced by special manufacturers and can be purchased.
There are many ways to protect the guide rail. The common protective cover is shown in Figure 1. Numerical control machine tools. Especially in the center of cutting, iron filings, coolant a lot, easy to enter the guide rail, increase guide wear; When the iron filings are large, the worktable is raised to affect the accuracy of the guide rail, so the steel plate telescopic protective cover is usually used.
1. Linear bearings are also a kind of rolling parts
Linear guide bearings, also known as linear bearings, are also rolling parts that can do linear reciprocating operation. Their functions are similar to linear guides, but their appearance is different, one is cylindrical, the other is cuboid.
2. The cost of linear bearings is low
The cost of linear bearings is lower than that of linear guides, but their accuracy and load capacity are inferior to that of linear guides.
3. Plastic linear bearing for sliding friction
Can be divided into plastic linear bearings and metal linear bearings, plastic linear bearings and shaft belong to sliding friction, friction coefficient is large, less noise.
In short, linear guide bearings are a kind of rolling parts that do infinite linear motion, while linear guides are rolling parts that do reciprocating linear motion. Linear guide bearings are also widely used, but not as widely used as linear guides.
Application:
The sliding guide has the advantages of simple structure, convenient manufacture and high contact stiffness. However, the traditional sliding guide has large friction resistance, fast wear, large difference in dynamic and static friction coefficient, and easy to produce crawling phenomenon at low speed. In order to improve the positioning accuracy and motion stability of CNC machine tools, plastic guide rails have been widely used in CNC machine tools.
