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Angular Contact Ball Bearing

Angular contact ball bearings have raceways on both the inner and outer rings, and the inner and outer rings can move relative to each other along the bearing axis. This type of bearing is particularly suitable for bearing compound loads, that is, loads acting radially and axially at the same time. The axial load bearing capacity of angular contact ball bearings increases with the increase of the contact angle α. The contact angle is the angle between the line connecting the contact points of the ball and the raceway in the radial plane and the perpendicular line to the bearing axis.

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Model number	Basic size			Basic load rating		Rated speed
				Dynamic state	Static	Reference speed	Limiting speed
	d [mm]	D [mm]	B [mm]	C [kN]	C₀ [kN]	[r/min]	[r/min]
7211 BEP	55	100	21	46.2	36	7500	7500
7211 BEGBY	55	100	21	49	40	8000	8000
7211 BEGAP	55	100	21	49	40	8000	8000
7211 BECBY	55	100	21	49	40	8000	8000
7211 BECBPH	55	100	21	49	40	8000	8000
7211 BECBP	55	100	21	49	40	8000	8000
7211 BECBM	55	100	21	49	40	11000	8000
7211 BECBJ	55	100	21	49	40	8000	8000
7211 BE-2RZP	55	100	21	46.2	36	7500	7500
7211 ACCBM	55	100	21	57	45	13000	8500
7210 BEP	50	90	20	37.7	28.5	9000	8500
7210 BEGBP	50	90	20	40	31	9000	9000

Model number	Basic size			Basic load rating		Rated speed
				Dynamic state	Static	Reference speed	Limiting speed
	d [in]	D [in]	B [in]	C [Ibf]	C₀ [Ibf]	[r/min]	[r/min]
7211 BEP						7500	7500
7211 BEGBY						8000	8000
7211 BEGAP						8000	8000
7211 BECBY						8000	8000
7211 BECBPH						8000	8000
7211 BECBP						8000	8000
7211 BECBM						11000	8000
7211 BECBJ						8000	8000
7211 BE-2RZP						7500	7500
7211 ACCBM						13000	8500
7210 BEP						9000	8500
7210 BEGBP						9000	9000

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Four-point Contact Ball Bearings

This is a single-row angular contact ball bearing with separated inner and outer rings. The inner ring is divided into two parts. It can withstand axial loads in two directions and is suitable for occasions with large pure axial loads or combined loads.

Double Row Angular Contact Ball Bearings

Double-row angular contact ball bearings have a double-row ball structure, occupying less axial space and can withstand bidirectional axial displacement and overturning moment.

Single Row Angular Contact Ball Bearings

Single row angular contact ball bearings include 718, 719, 70, 72, 73 and other series. These bearings can withstand unidirectional axial and radial forces. The contact angles are 15° (suffix C), 25° (suffix AC), 30° (suffix A) and 40° (suffix B). The larger the contact angle, the stronger the axial load bearing capacity, but the speed will be relatively slow.

Angular Contact Ball Bearings Feature

1. Bidirectional load capacity: Angular contact ball bearings can bear radial loads and axial loads at the same time. This bidirectional load capacity makes it widely used in the field of industrial machinery, such as machine tool spindles, automobile wheel hubs, motor rotors, etc.

‌2. High-speed operation: Angular contact ball bearings can operate at higher speeds. The larger the contact angle, the higher the axial load capacity, and the smaller the contact angle, the more suitable it is for high-speed rotation.

‌3. Paired installation:

Since single-row angular contact ball bearings can only bear axial loads in one direction, they are usually installed in pairs, with back-to-back and face-to-face forms. Paired bearings can withstand bidirectional axial loads.

‌4. Preload effect:

Preload is one of the important factors that determine the performance of angular contact ball bearings. The larger the preload, the higher the radial stiffness and axial stiffness, but the heat generation increases and the limit speed decreases. Excessive preload may cause sticking during high-speed operation.

‌5. Combination use‌: Angular contact ball bearings can be used in combination. Common combinations include back-to-back combination (DB), face-to-face combination (DF) and series combination (DT). Combination use can provide higher rigidity and load capacity, but the maximum speed will be reduced.

‌Application

Angular contact ball bearings are widely used in high-frequency motors, centrifugal separators, small car front wheels, oil pumps, Roots blowers, air compressors and other equipment.