Angular contact ball bearing steel ball with the inside and outside the circle of the connection point of contact with the radial point of view into one. Generally be divided into the contact angle of 15 °, 30 °, 40 °, respectively, with the letters C, A, B express .High-precision and high-speed bearings normally be admitted to the contact angle 15 degrees. At the role of axial force, the contact angle will increase. Single row angular contact ball bearings can only bear axial load in one direction, the radial load to bear, it will cause additional axial force.