Othmro 6704-2RS Deep Groove Ball Bearing 20x27x4mm Sealed Chrome Steel Bearings 2pcs

Deep Groove Ball Bearings Ball bearing, in which the rolling elements are spherical balls. The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. (Reducing the friction of certain moving parts by replacing sliding friction with rolling friction) With small friction and high-limit speed, cost-effective and require little maintenance Used in parts such as steering, engine, driveline, and driveshaft. Such as motor, skateboards, ect.