The ZYS precision angular contact ball bearings for spindles, have four size series, 718, 719, 70 and 72. With the same inner diameter, the outer diameters and the widths of 718, 719, 70 and 72 series increase in turn.

ZYS precision angular contact ball bearings with 15°(C) and 25°(AC) contact angles. As for the angular contact ball bearings, the bigger the contact angle is, the greater the axial load capacity is, but the lower the limited speed of bearings becomes. Therefore, the spindle, with high speed and small axial load, should adopt the 15° angular contact ball bearings, whereas the 25° angular contact ball bearings should be adopted.

The inner ring, outer ring and rolling element of rolling bearing under normal operating conditions are made of high carbon chromium bearing steel, but the steel bearings cann't meet the requirements of such special conditions as high speed, wear-resisting, low temperature rise, long life, high reliability, etc., then Si3N4 ceramics are believed to be present optimum rolling bearing materials to replace bearing steel.

ZYS also offers widely used hybrid angular contact ball bearings for spindles in high-speed precision machine tools and other high-speed precision machines, that is, the inner and outer rings are made of high-quality bearing steel materials, while the rolling elements are made of Si3N4 ceramics.

Compared to the angular contact ball bearings made of steel, hybrid angular contact ball bearings with the same structure and size have high speed, high rigidity, low friction heat, long life, etc.

ZYS precision hybrid bearings with ceramic balls(HQ1) can significantly improve the speed, rigidity, reliability and productivity of machine tools, and greatly reduce the friction heat, then extend the service life of host machine, etc.