1,groove ball bearing 2,High speed 3,End cover:ZZ,RS 4,Noise ... ,C2,C0,C3... groove ball bearing HX Bearings manufacture precision ball bearings from 3mm to 500mm O.D. Production ... well as custom designs are available to meet your requirements for load, speed, torque, assembly, corrosion resistance and operating life ... Series Bore sizes 0.0781 to 0.375 inches high precision deep groove ball bearing