... when running the design, the ball rolling with a washer-shaped ring rolling Erdaogou form. ... 1. with one-way, two types of two-way. 2. In order to allow installation error, whether one-way or two-way, you ... with axis), and a house washer, balls are rotating between them. They only bear axial load in one ... not bear radial load. They have the structure with a seat, and the installation surface is spherical ...