This bearing ball is made of chrome steel, conforms to G10 precision, and has a diameter of 4 mm. This bearing ball is suitable for use in single- and double-row bearings that support radial loads. This bearing is made of chrome steel for durability and resistance to deformity under heavy loads. This bearing conforms to grade G10 for precision in sphericity, surface integrity, and size. The ball has a diameter of 4 mm. This steel ball is suitable for use as a replacement ball within a bearing.

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.