This skateboard bearing with built-in spacers is a single-row bearing for supporting radial loads and has chrome steel races for durability and resistance to deformity under heavy loads. Its nylon cage evenly spaces the balls for even load distribution and prevents contact to reduce friction, vibrations, and noise. The inner race extends outward beyond profile of the bearing, providing a built-in spacer between it and the adjoining part in the application. This bearing has ceramic balls for durability, high shock tolerance, and resistance to heat and fracturing. It comes in a pack of eight.

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.