Single row angular contact ball bearings can only bear axial load in one direction. When bearing radial load, additional axial force will be caused. And only limit the axial displacement of the shaft or housing in one direction. Angular contact ball bearings have a contact Angle of 40 degrees, so they can withstand large axial loads. Angular contact ball bearings are of a non-separable design with different shoulders on both sides of the inner and outer rings. In order to increase the bearing load capacity, one shoulder is machined lower so that the bearing can hold more steel balls.1. Bearings of general configuration group General assembly bearings are specially machined so that when bearings are mounted close to each other, any combination can achieve a given internal clearance or preload, and an even load distribution, without the use of gaskets or similar devices. Paired bearings are applied when the load carrying capacity of a single bearing is insufficient (using channeling configuration) or when combined loads or axial loads acting in two directions (using back-to-back or face-to-face configuration). 2, the basic design of bearings (can not be used as a general configuration group), for a single bearing configuration. The basic design of single-row angular contact ball bearings is mainly applied in a configuration with only one bearing per position. The width and protrusion are ordinary tolerances. Therefore, it is not suitable to install two single-row angular contact ball bearings close to each other.Single row angular contact ball bearing: machine tool spindle, high frequency motor, gas turbine, centrifugal separator, small car front wheel, differential pinion shaft, booster pump, drilling platform, food machinery, dividing head, welding machine, low noise cooling tower, mechanical and electrical equipment, painting equipment, machine tool groove plate, arc welding machine. Double row angular contact ball bearing, oil pump, roots blower, air compressor, all kinds of transmission, fuel injection pump, printing machinery, planetary reducer, extraction equipment, cycloid reducer, food packaging machinery, electric welding machine, electric, square box, gravity type spray gun, wire stripping machine, axle shaft equipment, chemical machinery, testing analysis.