QJ Series angular contact ball bearing

Four-point contact ball bearing is a kind of separated bearing, also can be said to be a set of bearings can withstand two-way axial load angular contact ball bearings, its inner and outer ring raceway is a peach type of cross section, when no load or pure radial load role, steel ball and ring present for four-point contact, this is also the origin of this name.

Four point contact ball bearing belongs to a kind of radial single row angular contact ball bearing, the design of the raceway is used to support the role of the axial load in two directions. Four point contact ball bearings can withstand radial loads as high as a fraction of the axial load. Compared with double row bearings, four point contact ball bearings take up significantly less axial space.

Four-point contact ball bearing inner circle (or outer ring) is by two half-ring precise collocation and become, and its overall periphery (or inner circle) of the groove radius of curvature is very small, so that the steel ball and the inner and outer ring in the four "points" are contact, so that not only increase the radial load capacity, but also can be compact size to bear the axial load of the two directions, and has a very good And has a very good two directions of the axial limit of the ability, this is because of its axial clearance is relatively small, and its contact angle (generally taken as 35 °) and relatively large reasons.

The permissible speed of four-point contact ball bearings is very high, and the operation is very smooth, and its double half-ring can be removed from the whole set of bearings to be installed separately, so the four-point contact ball bearings are mostly used in the engine, because it can withstand a lot of radial loads and axial loads at a high speed.