Common model, the internal clearance, ball bearing preloading

Common type, ball bearing internal clearance, preloading micro and small ball bearing, ball bearing is composed of outer ring, inner ring, rolling, rolling retainer, seal ( Dust cover) And spring coil of machining parts. Less than 30 mm outside diameter is called the micro and small ball bearing, is to ensure that the shaft of the rotating equipment with high precision requirements stable operation of the bearing parts and assembly in precision parts. Large and medium-sized ball bearing ( The plane related parts) : the ball bearing applied in aviation supplies, relative to the average small ball bearings, ball bearings and the material is different, the number of pay more attention to the durability on the structure. Bearing bushings: bearing bushing movable part of a large number of applied to aircraft, also often used in helicopter rotor shaft and the aircraft landing gear, etc. Beauty bud is the group in its circle and flange surface USES the independent research and development of teflon material, thus achieved without the use of traditional lubrication conditions. Large and medium-sized ball bearing ( The plane related parts) : the ball bearing applied in aviation supplies, relative to the average small ball bearings, ball bearings and the material is different, the number of pay more attention to the durability on the structure. Bearing internal clearance: ball bearing internal clearance for service life, vibration, sound, fever and so on bearing performance have a significant impact. Therefore, according to the purposes and select the appropriate internal clearance is very important. Clearance can be divided into the radial clearance, axial clearance, clearance three clearance Angle. Ball bearing preloading: when the ball bearing in motor, in axial direction and a load that radial clearance to 0. Add preloading because a radial clearance, the rotation of the ball bearing vibration is big, and the bearing rigidity weakening, etc. , the rotating vibration on the axial load is called the preloading. Preloading is not arbitrary decision, should according to the bearing size choices. Preset pressure obtained is too big, can shorten the service life, and the friction torque is bigger. Preset pressure is too small, and will increase the vibration, rigid, the raceway surface micro vibration caused by wear and tear. Therefore, in the use of ball bearing, it is very important to correctly set a preset pressure.