Deep groove ball bearing (C type)
C series deep groove ball bearings are single row radial ball bearings of conventional design. It is Conrad type, which means its inner ring and outer ring will have a special displacement, so that the number of balls that can be loaded is about half of the full complement type. Type C bearings are mainly used to bear radial loads, but they can also bear limited axial (thrust) loads from a certain direction. However, if the main load is axial load direction, angular contact ball bearings will be more suitable.
Angular contact ball bearing (A type)
Type A bearings have a round window cage, 30 degrees contact angle, and the number of balls is approximately 65% of the full complement type.
The biggest advantage of Type A bearing is that it can provide greater axial load capacity than Type C or Type X. Therefore, such bearings are generally installed opposite to each other to maintain the contact angle and bear the two-way thrust load.
Four-point contact bearings (X type)
X-type bearings are characterized by having gothic arch inner and outer ring raceways. In this way, a single bearing can bear three kinds of loads (radial load, axial load and moment) at the same time . A four point contact bearing can often replace two bearings, which makes the design more concise.
X-type bearings can provide different internal preloads and clearances according to customers’ needs, such as high rigidity or zero clearance. This can be achieved by using balls with a larger gap between the raceways of the inner and outer races.