Bearing is fixed in a mechanical transmission process and reduce the load friction coefficient part. In other words, while other parts on the shaft when each other produce relative movement, used to reduce the friction coefficient and keep shaft centre position fixed at part in the process of power transfer. In modern machinery equipment bearing is a kind of indispensable part. Its main function is to support the mechanical revolution body, to reduce equipment in transmission process mechanical load friction coefficient.
According to different motion components friction quality, bearing can be divided into two categories of rolling bearing and sliding bearing. Divide careful a little, there are many varieties of bearings. Such as centripetal bearing, thrust bearing, liquid lubrication bearing, incomplete liquid lubrication bearing, no lubrication bearing, self-aligning ball bearing, spherical roller bearing, tapered roller bearing, double row deep groove ball bearing, thrust ball bearing, deep groove ball bearing, angular contact ball bearing, cylindrical roller bearing, needle roller bearing, etc.
Bearing the seal can be divided into two categories, own seal and plus seal. Bearing with own seal is sealed the bearing itself made it into the performance of the device. Such as bearing has dust cover and sealing ring, etc. This seal take up the space is small, easy installation and disassembly, cost is also low. And bearing plus seal performance device, is in installation end cover etc. internal manufacturing into with various properties sealing device.
Choose the bearing plus seal should consider the following several major factors: bearing lubricant and types; Bearing work environment, taking up space; Shaft supporting structure advantage, allowing the angular deviation; Sealing surface circumference speed; Bearing operating temperature; The manufacturing cost.
Bearing is the important foundation part in all kinds of machinery equipments, its accuracy, performance, life and reliability play a conclusive role in main engine accuracy, performance, life and reliability. So visible, bearing is widespread application in all kinds of machinery, such as machine tool, pneumatic press machine, drilling machine, etc.