QA1 GEZ34ES GEZ Series Spherical Bearing 52100 Steel 1-3/8in. BoreQA1 GEZ34ES GEZ Series Spherical Bearing 52100 Steel 1 3 8in. Bore QA1s GEZ Series fractured race spherical bearings are manufactured using 52100 bearing steel, making them a commercial grade bearing thats ideally suited for high wear and increased load applications found in many industrial markets. Because of the strength of the steel, the race cannot be molded around the ball and therefore is fractured slightly to allow the ball to be inserted. The