... cage is used. When the outer diameter of bearing is no more than 400 millimeter, stamped steel ... : Chrome steel, Carbon steel, stainless steel and ceramic bearing.5 Special bearings and Nonstandard bearings according to customers' ... drawings & samples.6 Shield/closure: Open ball bearing, Z, ZZ, RS, 2RS, 2RZ7 Tolerance Code: ABEC- ... 2Z RS 2RS 6000 2RS NBR Seal ring Deep groove ball bearing