Ball bearings 61811 (RS, 2RS, Z, 2Z) Dimensions and Calculation data d55mm D72mm B9mm rs0,3mm Do you have a question or need help? If you would like one of our specialists to contact you for clarification, please click here. Contacts Rated dynamic load capacityC r9,15kN Rated static load capacityC or9,04kN Fatigue strength limitPu0,42kN Bearing weight0,083kg Nominal speed19000r/min The maximum frequency of rotation12000r/min