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Four-point Contact Ball Bearing

Four-point Contact Ball Bearing




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The Four-point Contact Ball Bearing is the separable bearing, typically available in two structures as follows: QJ 0000 (with two half inner rings and a complete outer ring) and QJF 0000 (with two half outer rings and a complete inner ring). The contact angle is usually 35°. If there is only a radial load, each steel ball contacts the raceway at four points. If there is only a unidirectional axial load, each steel ball contacts the raceway at two points. It can bear the axial load in two directions as well as a certain eccentric load, i.e. torque. Such kind of bearing can possess the features of single-row and double-row angular contact ball bearings simultaneously. Under a high-speed scenario, two-point contact must be ensured for the normal working.


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