Bearing is the part of the machine that supports the rotary axis and linear motion axis. In machinery to support the rotating body, linear back and forth movement of the role of the body.。 When other parts of the shaft move relative to each other, the parts used to maintain the center position of the shaft and to control the movement are called bearings.

Bearing is widely used and in amazing quantities.A car needs to use 100~150 bearings, not only cars, airplanes, washing machines, refrigerators, air conditioners, vacuum cleaners, photocopying machines, computers, and even man-made satellites in space, there are bearings of the figure.

The function of a bearing is to “reduce mechanical friction”. Reducing friction has three major benefits.

Improve the efficiency of the machinery. 
Extends the service life of the machine.
Prevents sticking and reduces mechanical failure.

Bearing can reduce friction, improve transmission efficiency, and contribute to energy saving. This is the reason why people often talk about “bearing the environment”.

The manufacture of bearings often involves ultra-precision polishing. As a technically demanding synthetic process, ultra-precision polishing must consist of both equipment and materials (polishing fluids), both of which are indispensable.