... groove ball bearing 2,High speed 3,End cover:ZZ,RS 4,Noise level:Z1,Z2 5,C2,C0,C3... groove ball bearing HX Bearings manufacture precision ball ... instrument bearings, dental bearings, large diameter ball bearings, thin section bearings,double row ball bearings.Deep groove ball bearing (Bore sizes over 10mm)Product TablesMetric Series ... 0.0781 to 0.375 inches high precision deep groove ball bearing