Linear bearing is a linear motion system, used for linear travel and cylindrical shaft. Because the bearing ball is in contact with the bearing jacket, the steel ball rolls with the least friction resistance, so the linear bearing has small friction and is relatively stable. It does not change with the bearing speed, and can obtain the smooth linear motion of high sensitivity and high precision. Linear bearing consumption also has its limitations, the most important is that the impact load capacity of the bearing is poor, and the bearing capacity is also poor, followed by linear bearing vibration and noise at high speed movement. Automatic selection of linear bearings is included. Linear bearings are widely used in precision machine tools, textile machinery, food packaging machinery, printing machinery and other industrial machinery sliding parts.