NEXT DAY DELIVERYThomson Super Ball Bushing bearings available in metric sizes 16, 20, 25, 30, 40 and 50 mm have a coefficient of friction as low as 0.001 that allows users to employ smaller and less expensive motors, belts, gears and ball screws when replacing high friction, plain bearings. They can act as a drop-in replacement for existing applications.