61904 Bearing 20x37x9 Open od480 Because the balls are added

Because the balls are added using construction

Outer Diameter (OD): 62mm

and spindle systems where smooth

701100M01K Nachi Angular Ball Bearing

61904 Bearing 20x37x9 Open od480 Because the balls are added61904 Open Ball Bearing One Bearing 61904 Open Ball Bearing, bearing is made from Chrome Steel. inner diameter is 20mm, outer diameter is 37mm and Width is 9mm 61904 Ball Bearing Deep Groove Ball Bearing Closures: Open Size: 20mm x 37mm x 9mm Inner Diameter: 20mm Outer Diameter: 37mm Width: 9mm Quantity: 1 Bearing Dynamic load rating Cr: 6,350 N Static load rating Cor: 3,700 N Limiting Speed: Grease Lubrication: 19,000 RPM Oil Lubrication: 23,000 RPM