Self Aligning Ball Bearing

Four-point contact ball bearings are a special category of rolling bearings that combine space efficiency and composite load-bearing capacity. The core feature is that the inner and outer ring raceways adopt a double arc design, so that the steel balls and the raceways form four contact points. A single set of bearings can simultaneously bear two-way axial load and radial load, without the need for multiple sets of bearing combinations. It is widely suitable for machine tool spindles, crane hooks, radar antennas, precision motors and other scenarios that have high requirements for space compactness and two-way limit. From a structural point of view, this type of bearing consists of four core components: "outer ring + inner ring + steel ball + cage". The key innovation lies in the raceway design: both the inner and outer ring raceways are symmetrical double arc grooves, and the arc radius and steel ball diameter are precisely calculated (usually the arc radius is 1.05-1.1 times the stee…