Single and double row angular contact ball bearings

Angular contact ball bearings of 70,000 are composed of the outer ring, inner ring,steel balls and cage. It can bear both radial and axial loads, can also be subjected to purely axial load, stability at higher speeds. Single row angular contact ball bearings can only withstand axial load in one direction. When the bearings under purely radial load, due to the line and rolling load radial load line is not the same in the radial plane, generating internal axial force, it must be installed in pairs.

1. single row angular contact ball bearings are single row angular contact ball bearings have the following structure:

(1) the separation of angular contact ball bearings

The bearing code number is S70000, its ring road does not lock, and the outline of the inner ring, cage, ball separation of components, which can be installed separately. Such as inner diameter of miniature bearing less than 10MM, for gyro rotor, micro-motors for dynamic balance, noise, vibration, stability has a higher requirement of appliance.

(2) non-separation of angular contact ball bearings

Channel lock for this type of bearing rings, rings of the two cannot be separated. By contact angle is divided into three types:

① contact angle α = 40 °, apply to take large axial loads;

② the contact angle α = 25 °, used for precision spindle bearings;

③ the contact angle α = 15 °, more for larger sizes of ball bearings.

(3) configured in pairs of the angular contact ball bearing

Paired angular contact ball bearings that are configured for both radial and axial loads, or you can take pure radial loads and axial loads in either direction. Such bearings by the factory preload requirements, combination matching pairs, available to users. When the bearings are mounted in the machine gets fixed after, completely eliminating the clearance in the bearing and outline of rings and balls in the preloaded State, thereby enhancing bearing steel.

Configured in pairs of angular contact ball bearings are available in three different configurations:

① back-to-back, post code for DB (for example, 70000/DB), this configuration is steel good, shoulder an overturning moment of the performance, can be subjected to bi-directional axial bearing load;

② face to face configuration, post code for DF (such as 70000/DF), rigidity and ability to withstand overturning moment of this configuration than the DB configuration forms, can be subjected to bi-directional axial bearing load;

③ tandem configuration, rear code-named DT (such as 70000/DT), this configuration is also available on the same bearing series of three or more bearings, but can only take a single direction axial loads. Typically, in order to balance and limit the axial displacement of the shaft and the other supporting Office installation to axial load bearing can bear the other party.

In addition, there is a any paired single row angular contact ball bearings. These bearings with a special process, two face-to-face or back-to-back, two-line combination in any way, axial clearance of paired combinations can be selected as needed, post code CA said smaller axial clearance, CB represents moderate axial clearance, CC larger axial clearance.

Universal pair of bearings, can be configured to have an interference by using requirements bearing, and later reset code GA, GB, GC said. GA paired with smaller interference; GB pairing with medium interference; a greater interference of GC said after the match.

2. double row angular contact ball bearings

Characteristics of double row angular contact ball bearing can bear both radial and axial loads combined load, limit the axial displacement of both sides of the axis.

Compared with the double-direction thrust ball bearings, these bearings the speed limit higher, contact angle 32 °, although good, affordable overturning moment, widely used in the front wheels of the car (some models also used the same dimensions of double row tapered roller bearings).

Double row angular contact ball bearings of the structure there are four variants:

(1) A diameter less than or equal to the 90mm bearings of standard design. No filling slots, thus subjected to bi-directional axial loads. With a lightweight glass fibre reinforced polyamide 66 cage, bearing temperature rise is small.

(2) A-type outer diameter is greater than the 90mm bearings of standard design. Filling slots on one side, with pressed window-type steel cages or solid cage of brass.

(3) E-type is a reinforced structure, with filling slots on one side, can fit into a larger number of steel balls, high bearing capacity.

(4) with shields on both sides both sides-and a-type design with sealing ring type and e-type design of double row angular contact ball bearings are available with shields on both sides (non-contact) or seals (contact). Sealed bearings are filled with rust inhibiting lithium base grease, operating temperature -30~+110 degrees centigrade. During use do not need lubrication, installation should not be heated, and should not be cleaned.

Double row angular contact ball bearing installation attention should be paid, although subjected to bi-directional axial bearing load, but when filling slots on one side, you should be careful not to allow the main axial loads through the Groove edge on one side of the gap.