Linear bearing is a kind of linear motion system, which is used to coordinate linear stroke with cylindrical shaft.Because the bearing ball contacts the point of bearing jacket, the steel ball rolls with the least friction resistance, so the linear bearing has small friction, and is relatively stable, does not change with the bearing speed, can obtain the stable linear movement with high sensitivity and precision.Linear bearing consumption also has its limitations, the most important is the bearing impact load capacity is poor, and the bearing capacity is poor, the second line bearing in high-speed movement of vibration and noise.Linear bearing automatic selection is included.Linear bearings are widely used in precision machine tools, textile machinery, food packaging machinery, printing machinery and other industrial machinery sliding parts.