Precision angular contact ball bearings are mainly used in high-speed rotation occasions with lighter loads, such as machine tool spindles, high-speed motors, machine tool ball screws, gas turbines, centrifugal separators, and so on. The bearings are required to have high precision, high speed, low temperature vibration and a certain service life. It is often installed and used as a support for high-speed electric spindles. It is a key accessory of high-speed electric spindles for internal surface grinders.

Therefore, the choice of precision angular contact ball is very important. It directly affects the processing performance of machine tool equipment. Nowadays, the bearing market is mixed with fish and fish, so it is necessary to pay more attention when selecting precision angular contact ball bearings.

Common methods to identify bearing quality:

1: Whether the outer packaging is clear or not, under normal circumstances, the brand of the factory has its own special design, and arranges production in factories that pass the production conditions, so the packaging is very clear from the lines to the color blocks, and is unambiguous, and some are imported The brand's accessory packaging also has a unique design designed to protect its intellectual property rights.

　　 2: Whether the steel stamp is clear, the brand will be printed on the bearing. Label etc. The font is very small, but most of the normal productions use steel stamping technology, and the font is pressed before heat treatment. Therefore, although the font is small, the concave is deep and very clear. Due to the rough printing technology, the fonts float on the surface, and some can even be easily erased by hand.

　　3: Is there any noise: Hold the inner sleeve of the bearing with your left hand, and rotate the outer sleeve with the right hand, and listen for noise. Some magazines such as sand are inevitably involved in manual workshop operations. They are hidden in the bearing body, so they will make noises when they rotate. This is the same as the original factory that strictly enforces production standards and uses machines. The biggest difference between brands.