Single-row bearing for supporting radial loads Shields on both sides of the bearing to keep lubricant in and contaminants out Carbon steel for durability and resistance to deformity under heavy loads 34,000 rpm limit with grease lubrication Dimensions suitable for use in such applications as skateboards, inline skates, and scooters This 608ZZ shielded 8x22x7 miniature ball bearing is a single-row bearing for supporting radial loads. The bearing is made of carbon steel for durability and resistance to deformity under heavy loads, and is shielded to keep lubricant in and contaminants out. it has a revolutions per minute (RPM) limit of 34,000 with grease lubrication. The dimensions of this bearing make it suitable for use in skateboards, inline skates, and scooters, among others. These bearings come in a pack of 100. Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. The