Precision angular contact ball bearings are mainly used for high-speed rotating occasions, such as machine tool spindle, high-speed motor, machine ball screw, steam turbine, centrifugal separator and so on. Requires high precision bearings, high speed, low temperature vibration and a certain degree of service life. Often used as a high-speed spindle support components used in pairs, is the surface of the high-speed spindle grinding machine key components.
 
So the choice of precision angular contact ball bearings is critical, he directly affects the machine tool processing performance, and now the bearing market quite a mixed bag, fish, in the selection of precision angular contact ball bearings is the need for more attention.
 
A common way to identify bearing quality:
 
(1) whether the packaging is clear; under normal circumstances, the factory brand has its own special design staff to design the external packaging, and arrange the production conditions of the factory to produce production, so the packaging from the line to the color blocks are very clear, Unambiguous, part of the imported brand of accessories on the packaging there are specifically designed to protect their own unique intellectual property design.
 
(2) steel printing is clear: the bearing body will be printed on the brand words, labels and so on. The font is very small, but most of the products are produced by the use of stamping technology, and before the heat treatment before the pressure word, so the font is small, but concave deep, very clear. The counterfeit product font is not only blurred, because the printing technology is rough, the font floating on the surface, and some even easily can be wiped out by hand.
 
(3) whether there is a noise: left hand holding the bearing sleeve, right hand toss the jacket to rotate, listen to whether there is a noise. As most of the counterfeit products production conditions behind, completely hand-workshop operation, in the production process will inevitably be mixed with a class of impurities in the sand, hidden in the bearing body, so when the rotation will be issued a noise. This is the biggest difference between the strict implementation of the production standards and the operation of the machine.