GQZ mainly sells P4 grade 70C/AC super-precision angular contact ball bearings, which can bear radial load and axial load, and can work at higher speeds. The larger the contact angle, the higher the axial load carrying capacity. High-precision and high-speed bearings usually take a contact angle of 15  degrees. 　　Angular contact ball bearings have: 7000C type (∝=15°), 7000AC type (∝=25°) several types. The lock of the bearing is on the outer ring. Generally, the inner and outer rings cannot be separated, and they can bear combined radial and axial loads and axial loads in one direction. The ability to withstand the axial load is determined by the contact angle. The larger the contact angle, the higher the ability to withstand the axial load.