Reasonable selection of spindle bearings

1 precision angular contact ball bearings
In the above several Roller bearing to precision angular contact ball bearings (Figure 1) is the most widely used. Angular contact ball bearings rolling the ball, because it is a point contact (distinguished from roller bearing line contact), they are able to provide higher speeds, smaller heat and higher rotational accuracy. In some applications where high-speed spindle, but also ceramic balls (typically Si3N4 or Al2O3) hybrid bearings. With the traditional full hardenability ball compared the characteristics of the ceramic ball material itself gives the ceramic ball bearings with high stiffness, high speed, high temperature, long life, high-end customers in order to meet the demand for machine tool bearings.
Precision angular contact ball bearings
For angular contact ball Slewing bearing contact angle, the more popular is the contact angle of 15 and 25; usually a contact angle of 15 has a relatively high speed performance, while 25 of the contact angle with high axial load carrying capacity. Since the choice of preloaded angular contact ball bearings for precision applications is very large, as in high load, high rigidity of the occasion, the general will choose medium or heavy bearing preload; And for some high-speed, high-precision applications, early in the bearing selection, you need to pay attention to choose the right preload. Preload is generally divided into light, medium and heavy-duty three kinds, general light preload more common. In order to facilitate the customer's use of the world's major bearing manufacturers generally available and add pre-ground bearing face of the bearing preload, which is commonly referred to as universal matching precision angular contact ball bearings form. These bearings are removed from the customer preload adjustment, thus saving installation time.