Linear bearing is a bearing that can achieve linear motion. It usually consists of two types: sliding bearing and rolling bearing. Sliding bearings use a lubricating oil film to form a lubricating layer inside the bearing, thereby reducing friction and wear and achieving smooth movement of the bearing. Rolling bearings use rolling elements to roll inside the bearing, thereby reducing friction and wear and achieving smooth movement of the bearing.

Purpose of linear bearings: Linear bearings are widely used in sliding parts of industrial machinery such as precision machine tool bearings, textile machinery bearings, food packaging machinery bearings, and printing machinery bearings. For linear motion ball bearings, the structure is to install a retainer in the outer ring to maintain The retainer is equipped with multiple steel balls and moves in an infinite cycle. Both ends of the retainer are fixed with inner spring retaining rings, and there are notch windows on the linear track where each steel ball is forced to work.