Timken Deep Groove Ball Bearings | Part # 310PP This Timken Medium 300K Series double sealed ball bearing with no snap ring is suitable for applications that support radial, thrust, and combined loads. This bearing is classified "Medium," making it applicable for average to above average radial loads, light to average thrust loads, and heavy shock loads. Deep raceways keep the balls stable under high rotational speeds, and the steel cage evenly spaces the balls of the bearing for reduced friction, vibration, and noise, making the bearing suitable for electric motor applications where quiet operation is required. The bearing has rubber seals on both sides to keep out contaminants such as dirt and grime and to hold in lubricant applied at manufacture. Medium double sealed ball bearings are for heavy-duty applications such as large electric motors, gear boxes, and commercial machinery such as industrial lathes and mills, among many other applications. Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. All rolling bearings are open, shielded, or sealed. Sealed bearings are lubricated with oil or grease in the bearing factory, while open and shielded bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use. The shield protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan. Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others. The Timken Company manufactures a variety of bearings, alloy steels, and related components and assemblies that meet International Organization for Standardization (ISO) standards for quality assurance. Founded in 1899, the Timken Company is based in Canton, Ohio. SPECIFICATIONS MET: Ball and roller bearings: ISO 9001 Ball and roller bearings: ISO 16949 Aerospace ball and roller bearings (excluding design and development): AS 9100 Ball and roller bearings and bearing components for aerospace: EASA Part 145, EASA Part 21 Ball and roller bearings inspection: CAAC Certificate ATTRIBUTES: Bore Diameter (inch): 1.9685 Bore Diameter (mm): 50 Outside Diameter (mm): 110 Outside Diameter (inch): 4.3307 Width (inch): 1.063 Width (mm): 27