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 ... product lines include: miniature & instrument bearings, dental bearings, large diameter ball bearings, thin section bearings,double row ball bearings ... Bore sizes 0.0781 to 0.375 inches high precision deep groove ball bearing