Ensure the quality of precision angular contact ball bearings china for machine tools

As we all know, the accuracy and quality of the spindle bearing are the key factors affecting the performance of the spindle. For how to define the accuracy of a precision ball bearings china, ISO/ABEC only defines the width tolerance, roundness, perpendicularity, taper, axial runout and radial runout of the inner and outer rings. In order to enable the machine tool spindle to achieve high precision, high speed, high rigidity and low vibration, low heat generation requirements, more parameters of the ball bearings china itself need to be controlled. Precision angular contact ball bearings have added parameters not defined by ISO/ABEC for customers, including preload tolerances, functional tests, traceability and micron codes, cleanliness, raceway curvature, balls, etc. and roundness, surface processing ( Functional and non-functional surfaces), steel specifications, cage trim and design, and installation chamfering. The definition of these parameters improves the quality of precision angular contact ball bearings china products, thereby improving the performance of machine tool spindles.

Before leaving the factory, super-precision angular contact ball bearings china have to undergo functional tests. The super-precision angular contact ball bearings are tested and tested through digital vibration filter analysis to ensure the quality and application performance of the bearing. All test results are traceable.

The raw materials of precision angular contact ball bearings china are generally made of bearing steel. The points of the bearing are:

1. Contact fatigue strength

Under the action of periodic load, the ball bearings china can easily cause fatigue damage when contacting the surface, that is, cracks and peeling appear, which is an important damage situation of the bearing. Therefore, in order to improve the service life of the bearing, the bearing steel must have a high contact fatigue strength.

2. Wear resistance

During the bearing task, not only rolling friction occurs between the ring, rolling element and the cage, but also sliding friction occurs, which causes the bearing parts to wear straight. In order to increase the wear of bearing parts, maintain the accuracy and stability of the ball bearings china, and extend the service life, the bearing steel should have good wear resistance.

Three, hardness

Hardness is one of the important qualities of ball bearings china quality and has an indirect effect on contact fatigue strength, wear resistance, and elastic limit. The hardness of bearing steel under operating conditions should reach HRC61~65, which enables the bearing to achieve higher contact fatigue strength and wear resistance.

Four, anti-rust performance

In order to prevent bearing parts and finished products from being corroded and rusted during processing, storage and use, it is requested that the bearing steel should have good rust resistance.

Five, processing performance

In the production process, bearing parts have to go through many cold and hot processing procedures. In order to satisfy the small quantity, high strength and high quality requirements, the bearing steel should have good processing performance. For example, cold and hot forming performance, cutting performance, hardenability, etc.

In addition to the above-mentioned basic requirements, bearing steel should also meet the requirements of proper chemical composition, average external structure, less non-metallic dopants, compliance with the external surface defects, and the external surface decarburization layer not exceeding the regular concentration.

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