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Angular Contact Ball Bearings

Angular Contact Ball Bearings (ACBB) can withstand radial and axial loads. It can work at a higher speed. The larger the contact angle, the higher the axial load carrying capacity. Contact angle for the radial plane ball and raceway contact point line and the bearing axis between the vertical line of the curve. High precision and high-speed bearings usually take 15 degrees contact angle. Under the action of axial force, the contact angle will increase.

Angular contact ball bearings have raceways on the inner and outer rings. The inner and outer rings can make relative displacement along the bearing axis. This kind of bearing is especially suitable for bearing compound load, that is, radial and axial action of the bag simultaneously. Angular contact ball bearing axial load-bearing capacity with the increase in contact angle and increase. The contact angle for the radial plane of the ball and raceway contact point line and the bearing axis between the vertical line of the curve.

Angular contact ball bearing models are divided into: a = 15 ° angular contact ball bearing (70000C type); a = 25 ° angular contact ball bearing (70000AC type); a = 40 ° angular contact ball bearing (70000B type); back-to-back pairs of duplex angular contact ball taking [70000C (AC, B) / DB type]; face-to-face pairs of duplex angular contact ball bearing ([ 70000C(AC,B)/DF]; tandem pairs of angular contact ball bearings [70000C (AC,B)/DT]; double row angular contact ball bearings with ball gap (type 00000); double row angular contact ball bearings without ball gap (type 00000A); double row angular contact ball bearings without ball gap and with dust caps on both sides (type 00000A-Z); No ball gap, both sides with dust cover double angular contact ball bearings (00000A-2Z type); No ball gap, a – side with a seal double angular contact ball bearings (00000ARS type); No ball gap, both sides with a seal double angular contact ball bearings (00000A-2RS type); four-point angular contact ball bearings (QJ0000 type), counting 13 kinds.

Single row angular contact ball bearing

Can only withstand a direction of axial load, in bearing radial load, will leadup additional axial force. And can only limit the shaft or shell in order of axial displacement. Angular contact ball bearings have a contact angle of 40 degrees to withstand a large axial load. Angular contact ball bearings are non-separate designs. The shoulders on both sides of the inner and outer rings are not – high. To increase the load capacity of the bearing, the shoulder of one side will be machined lower so that the bearing can be loaded with more steel balls.

Double row angular contact ball bearings

Can bear a large radial load, mainly radial and axial combined load and moment load, to limit the axial displacement of the shaft in both directions. Mainly used to restrict the shaft and shell two-way axial displacement of the components in the double row angular contact ball bearing between the inner and outer ring can be tilted limited, the allowable tilt angle depends on the internal clearance of the bearing, bearing size, interior design and the force and moment acting on the path, and the maximum allowable tilt angle should ensure that the approach does not produce too high additional stress. Suppose there is a tilting angle between the inner and outer ring of the bearing. In that case, it will affect the life of the path and, at the same time, cause the approach running accuracy to decrease and the running noise to increase. Double row angular contact ball bearings generally use nylon cage or brass solid cell. 

Double row angular contact ball bearing installation should be noted. However, the bearing can take a two-way axial load, but if the – – side of the ball loading gap, should be careful not to let the main axial load through a – side of the gap groove edge. In using bearings, one should be cautious about making the raceway side without the ball notch to bear the main load.

Characteristics

1.Commonly matched bearings

Universal mating bearing is after special processing when the bearings are mounted close to each other; any combination can achieve the established internal clearance or preload, as well as the average load distribution, without the use of shims or similar devices.

Paired bearings are used: when the load-carrying capacity of a single approach is insufficient (using the tampering configuration) or when the combined load or axial load is acting in two directions (using the back-to-back or face-to-face configuration).

2. The basic design of the bearing (cannot be used as a universal group), for a single bearing configuration way the basic design of the single row angular contact ball bearing is mainly applied in each position only – a bearing configuration. Its width and protrusion are common grade tolerances. Therefore, it is not suitable to mount two single row angular contact ball bearings close to each other.

Accuracy classes

The accuracy class of angular contact ball bearings includes dimensional tolerances and rotational accuracy. The accuracy from low to high is PO (ordinary), P6 (P6X), P5, P4, P2. In addition, European and American brands also use P3, P7, P9 to indicate the accuracy level; P3 is equivalent to ISO. JIS standard P6, P7 is equal to P4, P9 is equivalent to P2.

Type

Angular contact ball bearings are available in 7000C (x=15°), 7000AC (∞ =25°) and 7000B (∞=40°) types. The lock port of this bearing in the outer ring, – – – – generally the inner and outer ring cannot be separated, can bear radial and axial combined load and a direction of the axial load. The contact angle determines the ability to bear axial load; the larger the contact angle, the higher the ability to bear axial load. This kind of bearing can limit the shaft or shell in the direction of axial displacement.

Contact ball bearing limit speed is higher, can take the radial and axial loads simultaneously, and can carry purely axial loads. The contact angle determines its axial load capacity, and with the increase of contact angle and increase.

Single row angular contact ball bearing can only withstand the direction of the axial load. Bearing radial load will cause additional axial force and must be applied to the corresponding reverse bag. Therefore, these kinds of bearings are generally used in pairs. Double row angular contact ball bearings can withstand large radial load-based radial, axial two-way combined load, and moment load; it can limit the shaft or shell two-way axial.

Displacement, contact angle is 30 degrees.

Bearing code: 7

Main applications

Single row angular contact ball bearing applications: machine tool spindle, high-frequency motor, gas turbine, centrifugal separator, small car front wheel, differential pinion shaft, booster pump, drilling platform, food machinery, indexing head, welding machine, low noise type cooling tower, electromechanical equipment, painting equipment, machine tool slot plate, arc welding machine

Double-row angular contact ball bearing applications: oil pumps, Roots blowers, air compressors, various types of transmissions, fuel injection pumps, printing machinery, planetary reducers, extraction equipment, cycloidal reducers, food packaging machinery, welding machines, soldering irons, square boxes, heavy-duty guns, wire strippers, half shafts, inspection and analysis equipment, delicate chemical machinery

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