This 99502 ball bearing has rubber seals and a snap ring. It has a 5/8" inside diameter and a 1-5/8" outside diameter. The bearing has deep groove geometry for supporting both radial and axial loads and high speeds. Rubber seals on both sides of the bearing help retain lubricant and exclude contaminants. A snap (retaining) ring located in the groove on the surface of the outer ring provides axial positioning for the bearing. The bearing is lubricated at the factory with grease. This deep groove ball bearing is used in applications such as go karts and mini bikes, among others.

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.