The ISUTAMI PBW series with wheel wheel bearings, also known as PBW with plastic transmission bearings. This type of bearing is one of the transmission bearings. This type of bearing is generally composed of an inner ring, an outer ring, a cage, a steel ball and a plastic ring. Or a product that is directly combined with a ball bearing and a plastic ring. The surface of the plastic ring can be made into different shapes, such as concave and convex, and matched with the corresponding shaft or belt. The products are generally non-standard and can be customized according to customer requirements.