Knowledge about turntable bearings in machine tools

The turntable bearing in machine tools is a precision bearing with a special structure that can simultaneously bear axial load, radial load and overturning moment and other comprehensive loads.

It has the characteristics of integrating support, rotation, transmission, fixation and other functions. The precision of turntable bearings is usually very high, basically at the micron level, and is mainly made by grinding. Their structures vary greatly, and different types of turntable bearings are suitable for different application scenarios. For example, YRT turntable bearings are suitable for precision CNC machine tools, measuring instruments, military equipment, etc., while slew plate bearings are suitable for heavy-load, low-speed applications, such as machinery and equipment in metallurgy, mining, cement and other industries.

The material of the turntable bearing is usually fully quenched bearing steel GCr15SiMn, which has high hardness and wear resistance, and also has good structural stability. In addition, there are some slew bearings that use surface-hardened steel and only undergo surface heat treatment. They have high impact resistance and economical material processing, but poor structural stability.

The turntable bearing in a machine tool is a very important component and has a significant impact on the performance and accuracy of the machine tool. When selecting and using turntable bearings, comprehensive considerations need to be made based on specific application scenarios and requirements to ensure the normal operation and accuracy of the machine tool.