Othmro Deep Groove Ball Bearing MR74-2RS 4x7x2_5mm GCr15 Steel Bearing Ball Bearings P0Z1 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.