Radial Ball Bearing, Double Shielded, 0.625 in Bore Dia., 40 mm Outside Dia./ OVERALL WIDTH: 12.0 MILLIMETERS NOMINAL BORE DIAMETER: 17.00 MILLIMETERS NOMINAL OVERALL OUTSIDE DIAMETER: 40.00 MILLIMETERS NOMINAL SURFACE FINISH: GROUND RETAINER FABRICATION METHOD: PRESSED SHIELD QUANTITY: 2 LOAD DIRECTION: RADIAL BORE SHAPE: STRAIGHT INTERNAL CLEARANCE: 0.0002 INCHES MINIMUM RADIAL AND 0.0002 INCHES MAXIMUM RADIAL AND 0.0006 INCHES MAXIMUM RADIAL STANDARD TOLERANCE DESIGNATION: ABEC NO.1 SPECIAL FEATURES: SELECTED FOR ELECTRIC MOTOR BEARING QUALITIES LUBRICATION MATERIAL: GREASE MATERIAL: STEEL OVERALL STYLE DESIGNATOR: 10A NON-LOADING GROOVE, NON-SEPARABLE