Compared with ordinary bearings, precision angular contact ball bearings have significant differences in multiple aspects:

1. Dimensional accuracy:

With the improvement of precision level, the size deviation requirements (such as inner diameter, outer diameter, ellipse, etc.) of precision angular contact ball bearings are becoming more stringent.

2. Rotation accuracy:

The requirements for high-precision bearings in terms of inner diameter runout, outer diameter runout, and end face runout on the raceway are significantly higher than those for high-precision products.

3. Surface quality:

The surface shape and surface quality of high-precision bearings, such as surface roughness, circular deviation, groove deviation, etc., require stricter requirements

4. Material properties:

For products with particularly high precision levels, their material performance is usually superior to products with general precision levels.

With the rapid development of CNC technology, the requirements for bearings in the machine tool industry are also increasing day by day. Precision angular contact ball bearings, as key components of the spindle and feed section of high-speed CNC machining centers, must meet the requirements of high precision, high speed, low noise, fault free, and high reliability of machine tools. The technical details during the assembly of these bearings have a crucial impact on their working condition and service life.

In the design of the spindle, a common practice is to install a row cylindrical roller bearing and a double row angular contact thrust ball bearing at the working end, while using a double row cylindrical roller bearing at the driving end. This configuration not only ensures the long service life and high rigidity of the bearings, but also helps to produce high-quality workpieces. Furthermore, from a kinematic perspective, this configuration enables the bearings to operate stably, as radial and axial loads are borne by different types of bearings, thereby preventing angular contact thrust ball bearings from bearing radial loads.

In summary, precision angular contact ball bearings play an indispensable role in the machine tool industry, and their performance and assembly quality directly affect the overall performance of the machine tool and the quality of the workpiece. Therefore, the selection and application of this core component should be given sufficient attention and attention.