What is the four point contact ball bearing?

Four point contact ball bearing is a separable bearing, it can also be said to be a set of angular contact ball bearings that can bear bidirectional axial load. The inner and outer ring raceways of the four point contact ball bearing are peach-shaped sections. When no load or pure radial load is applied, the steel ball and the rings.

The function of four point contact ball bearing
When only the pure axial load acts, the steel ball and the ferrule become two-point contact, which can bear the bidirectional axial load. The four point contact ball bearing can also bear moment load, and has the functions of single row angular contact ball bearing and double row angular contact ball bearing. The four point contact ball bearing can only guarantee normal work when two points of contact are formed. Therefore, it is generally suitable for those occasions where there is two-point contact under pure axial load or synthetic load with large axial load. The four-point contact ball bearing has a high limit speed, and it is also suitable for those high-speed running occasions.

Features of four point contact ball bearing
The four point contact ball bearing is a separable structure, and a single bearing can replace the angular contact ball bearing of the front combination or the back combination. It can bear radial load and bidirectional axial load, and can limit axial displacement in two directions, but it occupies less axial space than the current specifications of double row angular contact ball bearings.
Compared with other ball bearings, when the radial clearance is the same, the four point contact ball bearing has a smaller axial clearance and a higher limit speed.

The four point contact ball bearing is suitable for bearing pure axial load or combined axial and radial load based on axial load. Due to the double-half inner ring (or outer ring), the number of balls is increased and the bearing capacity is larger.
Under normal working conditions, this type of bearing can form a contact angle when bearing axial load in any direction, and the steel ball is in contact with the inner and outer raceways at one point to avoid large sliding friction in the contact area. Therefore, the bearing should not be subjected to radial forces and loads.

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