Linear bearings are the core mechanical components of linear motion systems, mainly used to achieve infinite stroke linear motion in conjunction with cylindrical shafts, and belong to basic linear guiding mechanisms. According to the material, it can be divided into two categories: metal and plastic. According to the structure, it can be divided into standard type, flange type, open type, etc. Among them, LM series (metric) and LME series (imperial) are suitable for different regional standards. Metal linear bearings achieve low resistance motion through rolling friction, using point contact between the bearing ball and the shaft. They have the characteristics of low friction and high accuracy, but have weak bearing capacity and high noise during high-speed operation; Plastic linear bearings adopt sliding friction method, in contact with the shaft surface, with greater load capacity, low noise and self-lubricating characteristics, suitable for medium and low-speed working conditions. Some innovative models have been optimized with graphite filling and buckle structure, which can improve their service life and simplify the installation process. Two types of bearings are widely used in precision machine tools, textile machinery, food packaging machinery and other fields. During use, it is necessary to avoid strong impact and follow lubrication specifications to maintain stability.
