ABEC-1 precision class, maximum speed 34000, with grease. Pre-lubricated, low friction, maintenance-free Single row radial ball bearings for applications supporting radial and axial loads Easy to disassemble and reinstall. Ideal products for medium loads: skateboards, inline skates, scooters, electric blade motors, bicycles, motorcycles, electric hand tools, etc. In many other scroll applications In many other bearing applications, replacing a worn skateboard on a bladed electric motor of a skateboard scooter, bicycle and motorcycle wheels, automobiles, electric hand tools, etc. Please check the size/dimensions or accuracy class (if it is suitable for your equipment). For ball bearings, the internal radial is C3, so the radial between the inner ring and the outer ring is larger than CN (normal) to compensate for thermal expansion. Heat treatment is carried out to increase hardness and improve wear resistance. It has deep ball grooves in both seat rings and can withstand high radial