January 16, 2020
The connection between the ball of the contact ball bearing and the contact point of the inner and outer rings is at an angle to the radial direction. The contact angle is generally divided into 15 °, 30 °, and 40 °, which are represented by the letters C, A, and B, respectively. NSK specially produces such bearings with a contact angle of 25 °, which is represented by A5.
Chinese name angular contact bearing contact angle 15 °, 30 °, 40 ° forming method stamped or turned material steel plate, brass
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Angular contact ball bearings mainly bear large unidirectional axial loads. The larger the contact angle, the greater the load capacity. The material of the cage is steel plate, brass or engineering plastic, and the molding method is stamping or turning. It is selected according to the bearing type or the use conditions. Others include combined angular contact ball bearings, double row angular contact ball bearings and four-point contact ball bearings.
Angular contact ball bearings can support both radial and axial loads. Can work at higher speeds. The larger the contact angle, the higher the axial load capacity. High-precision and high-speed bearings usually adopt a contact angle of 15 degrees. Under axial force, the contact angle will increase. Single-row angular contact ball bearings can only bear axial loads in one direction, and they will cause additional axial forces when bearing radial loads. And can only limit the axial displacement of the shaft or housing in one direction. If it is installed in pairs, the outer rings of a pair of bearings are opposite, that is, the wide end face is opposite to the wide end face, and the narrow end face is opposite to the narrow end face. This prevents additional axial forces and limits the shaft or housing to axial clearance in both directions.
Angular contact ball bearings, because of the relative displacement of the inner and outer races on the horizontal axis, can bear radial and axial loads at the same time-combined loads (single-row angular contact ball bearings can only bear axial loads in one direction, Therefore, they are usually installed in pairs). The material of the cage includes brass, synthetic resin, etc., which are differentiated according to the bearing type and use conditions.
7000C type (∝ = 15 °), 7000AC type (∝ = 25 °) and 7000B (∝ = 40 °) The lock of this bearing is on the outer ring. Generally, the inner and outer rings cannot be separated and can withstand radial and axial Combined load and axial load in one direction. The ability to withstand axial loads is determined by the contact angle. The larger the contact angle, the higher the ability to withstand axial loads. This kind of bearing can limit the axial displacement of the shaft or housing in one direction.
l Single line: 78XX, 79XX, 70XX, 72XX, 73XX, 74XX
2 Mini: 70X
3 double row: 52XX, 53XX, 32XX, 33XX, LD57, LD58
4 Four-point contact: QJ2XX, QJ3XX