What role does the bearing have？

What role does the bearing have？

The role of the bearing is to support, if the transmission parts (such as: shaft) and the hole are directly matched, a transmission resistance is large, and after the wear is large, the transmission parts are not easy to replace, and the bearing is dependent on the rolling contact between the components to support the transmission parts.

Therefore, the sliding resistance is small, the power consumption is less, the starting is easy and so on. The main function of the bearing is to support the mechanical rotating body, reduce the friction coefficient in the process of motion, and ensure its rotation accuracy. It can be understood that it is used to fix the axis, so that it can only realize rotation, but control its axial and radial movement. 

If the shaft doesn't have bearings it won't work at all. Because the axis can move in any direction, and the work requires that the axis can only be rotated. Bearings have a wide range of uses, automotive: rear wheels, transmission, electrical components. Electrical: general motors, household appliances. Instrument, internal combustion engine, construction machinery, railway rolling stock, loading, unloading and handling machinery, various industrial machinery. 

Machine tool spindle, agricultural machinery, high frequency motor, gas turbine, centrifuge, small car front wheel, differential pinion shaft. Oil pump, Roots blower, air compressor, all kinds of transmission, fuel injection pump, printing machinery, motor, generator, internal combustion engine, gas turbine, machine tool spindle, reduction device, loading and unloading handling machinery, all kinds of industrial machinery, etc. Almost as long as it is rotating are used to the bearing.