R4 Nachi Bearing Open Japan 1/4" x 5/8" x 13/64 universal ground type the NU313MY inner diameter is

the NU313MY inner diameter is 65mm

and ultra-lightweight

the NJ221 outer diameter is 190mm

TC815 Bearing

high-load movement

R4 Nachi Bearing Open Japan 1/4" x 5/8" x 13/64 universal ground type the NU313MY inner diameter isR4 Nachi Open Radial Ball Bearing 1 4" x 5 8" x 13 64" inch Made in Japan R4 Nachi Open Ball Bearing, inner diameter is 1 4", outer diameter is 5 8" and width is 13 64", Made in Japan R4 Nachi Ball Bearing Nachi Deep groove Ball Bearing Closures: Open Dimensions: 1 4" x 5 8" x 13 64" inch ID (inner diameter) Bore: 1 4" inch OD (outer diameter): 5 8" inch Width: 13 64" inch Quantity: 1 Bearing Dynamic load rating Cr: 335 LBS Static load rating Cor: 139