RKB 6312 2RS BearingSize INSIDE DIAMETER (MM): 60MM OUTSIDE DIAMETER (MM): 130MM WIDTH (MM): 31MM CAGE TYPE: STEEL SEALS OR SHIELDS: TWO RUBBER SEALS CLEARANCE: STANDARD DYNAMIC LOAD RATING (KN): 81. 8 STATIC LOAD RATING (KN): 51. 8 REFERENCE SPEED RATING (R MIN): 9100 LIMITING SPEED RATING (R MIN): 6400 The RKB Bearing Industries Group is the Swiss manufacturing organization which has been operating in the bearing industry since 1936, with a monthly production capacity