Single row angular contact ball bearings and double row angular contact ball bearing points of knowledge

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Angular contact ball bearing type 70000, and by the outer ring, inner ring, ball cage composition. Both radial and axial load can also be subject to pure axial load, stable in high speed. Single row angular contact ball bearings can only supp ort axial load in one direction. These bearings under pure radial load, due to the rolling element load line and the radial load line is not the same radial plane, the internal axial component, it must be installed in pairs.roller thrust bearings
A single row angular contact ball bearings Single row angular contact ball bearings have the following structure:

(1) Separation of angular contact ball bearings

This bearing the code name for the S70000 locking edge of the outer ring raceway and the inner ring, cage, Gang ball component separation, which can be installed separately. This type of multi-diameter less than 10mm of miniature bearings for gyro rotor, micro motors have higher requirements for balancing, noise, vibration, stability devices.tool bearings

(2) non-separable angular contact ball bearings

Such bearing ring channel locking, so the two sets of ring can not be separated. Contact angle is divided into three types:cylindrical bearings

â'  contact angle α = 40 °, apply to withstand greater axial load;

The â'¡ contact angle α = 25 °, used for precision spindle bearings;

(3) the contact angle α = 15 °, used for large-size precision bearings.

(3) pairs of the configuration of the angular contact ball bearings

Occasions, paired configuration of the angular contact ball bearings used to bear radial load and axial load to pure radial loads in either direction and can withstand axial load. Such a bearing manufacturing plant according to certain pre-load requirements, optional combinations of pairs, available to users. When the bearing is installed on the machine after fastening, complete elimination of the clearance in the bearings, and rings and the Gang ball in a preload state, thereby enhancing the combination of bearing steel.

Paired configuration of the angular contact ball bearings, there are three different types of configuration:

â'  back-to-back configuration, the post code for the DB (such as 70000/DB), this configuration of better steel to withstand the overturning moment of performance, the bearings can accommodate axial load;

â'¡ face-to-face configuration, the post code for DF (70000/DF ), this configuration, the rigidity and to withstand the overturning moment capacity as the DB configurations, the bearings can accommodate axial loads;

(3) in series configuration, the post code for the DT (70000/DT) This configuration can also be connected in series in the same supporting three or more bearings, but can only afford a one-way axial load. Usually, in order to balance and limit the axis of the axial displacement of the o ther supporting the Department to be installed can withstand the axial load bearing in the other direction.

In addition, there is an available for any pair of single row angular contact ball bearings. This bearing a special processing, the axial clearance of the combination of two back to back, two face-to-face or two series either way, matching combination according to the need to select, set codenamed CA said axial gap smaller, CB, said axial gap is moderate, CC said axial clearance.

Universal paired bearings, in accordance with the requirements to have pre-configured as a surplus of bearing, and later set code GA, GB, GC said. GA said that after pairing a smaller pre-Ying; GB moderate preloaded paired; GC said that after pairing a large preloaded.

(2) double row angular contact ball bearings

The characteristics of the double row angular contact ball bearings can withstand the radial and axial loads combined load limit shaft axia l displacement.

Compared to two-way thrust ball bearings, bearing limit speed is high, the contact angle of 32 degrees, good rigidity, can withstand the overturning moment is large, widely used in the car s front wheels (some models use the same size double row tapered roller bearings).

Structural variants of the double row angular contact ball bearings, there are four:

(1) A diameter less than or equal to 90mm bearings of standard design. Gap ball can withstand the equivalent of two-way axial load. Lightweight glass fiber reinforced nylon 66 cage bearing temperature rise is very small.

(2) outside diameter greater than 90mm bearings standard design. Side of the ball gap with steel stamping cage or brass solid cage.

(3) E is a reinforced structure, the side with filling the gap, can be installed more ball, and therefore a higher carrying capacity.

(4) sides with a dust cover type, and both sides with a ring-ty pe A-type design and E-type design of double row angular contact ball bearings on both sides with a dust cover (non-contact) or seals (contact ). Internal sealed bearings are filled with rust-proof lithium grease, the operating temperature is generally -30 to +110 ℃. Without re-lubrication during use should not be heated prior to installation, nor should be cleaned.

Double row angular contact ball bearings should be installed to note that although the bearings can accommodate axial loads, but the side of the ball gap, you should be careful not to let the main axial load through the gap side of the gutter.