61909, 61909N, 61909Z, 61909ZZ, 61909-RZ, 61909-2RZ, 61909RS, 61909-2RS deep groove ball bearing Basic Information Structure : Deep Groove Type Ball Model Number: 61909 Precision Rating: P0 P6 P5 Inner diameter : 45 mm±0.0001 mm Outer diameter: 68mm±0.0001 mm Width: 12 mm±0.0001 mm  Similar type: 61909, 61909N, 61909Z, 61909ZZ, 61909-RZ, 61909-2RZ, 61909RS, 61909-2RS Quality standard: ISO 9001:2000 Service: