Four-point contact Bearing

The four-point contact ball bearing is a separate type of bearing. It can also be said that it is an angular contact ball bearing that can withstand two-way axial load. The inner and outer ring raceways are peach-shaped cross-sections. When there is no load or pure radial load, the steel ball and the ferrule appear as four-point contact, which is the origin of this name.
When only a pure axial load is applied, the steel ball and the ferrule become two-point contact and can withstand two-way axial loads. Four-point contact ball bearings can also withstand moment loads, as well as single row angular contact ball bearings and double row angular contact ball bearings. Four-point contact ball bearings guarantee normal operation only when two points of contact are formed. Therefore, it is generally suitable for those places where there is a two-point contact under a synthetic load with a pure axial load or a large axial load. The four-point contact ball bearing has a high limit speed and is also suitable for those applications where high speed operation is required.