What are the commonly used bearings for CNC machine tools?

What are the commonly used bearings for CNC machine tools?

The commonly used bearings for CNC machine tools mainly include precision angular contact ball bearings, cylindrical roller bearings, and tapered roller 

bearings.

Precision angular contact ball bearings: This is the most widely used type of bearing in CNC machine tool spindles. It can withstand both radial and axial 

loads simultaneously, with a higher speed ratio, lower heat value, and better rotational accuracy. The contact angles of angular contact ball bearings are 

mostly 15 ° and 25 °, with 15 ° having a very high speed ratio and 25 ° having a high axial bearing capacity.

Cylindrical roller bearing: The internal rolling elements of this bearing are cylindrical rollers, which can withstand large radial loads but cannot withstand a 

large amount of axial loads. It is usually used in conjunction with precision angular contact ball bearings or thrust bearings, which can withstand large axial 

loads and allow for higher speed ratios. Cylindrical roller bearings are widely used in machine tools such as lathes, boring machines, and grinders that require 

load-bearing capacity.

Conical roller bearings: The rolling elements of conical roller bearings are conical rollers that can withstand both radial and axial loads simultaneously. With its 

unique conical design, tapered roller bearings have extremely high rigidity and stability under high loads, mainly used on machine tool spindles that need to 

handle large loads, such as heavy-duty lathes and boring machines.

In addition, there are some particularly fast applications of CNC machine tool spindle bearings that use ceramic ball composite bearings to meet the requirements 

of high-end users for CNC lathe bearings.