Series 9300 Cone Part Number 9378 Cup Part Number 9320D Design Unit Inch Cage Material Stamped Steel Dimensions d - Bore 3 in 76.2 mm D - Cup Outer Diameter 7.0000 in 177.800 mm B - Cone Width 2 in 50.8 mm C - Double Cup Width 2.9375 in 74.613 mm T - Bearing Width across Cones 4.5624 in 115.885 mm Abutment and Fillet Dimensions R - Cone Backface "To Clear" Radius1 0.14 in 3.600 mm r - Cup Backface "To Clear" Radius2 0.090 in 2.3 mm db - Cone Backface Backing Diameter 4.13 in 105.0 mm Da - Cup Frontface Backing Diameter 6.48 in 164.59 mm Aa - Cage-Cone Backface Clearance 0.44 in 11.2 mm a - Effective Center Location3 0.05 in 1.3 mm Basic Load Ratings C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)4 21200 lbf 94100 N C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)5 142000 lbf 632000 N C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)6 36800 lbf 164000 N Ca90 - Dynamic Thrust Rating (90 million revolutions)7 27700 lbf 123000 N Factors K - Factor8 0.76 e - ISO Factor9 0.76 Y1 - ISO Factor10 0.88 Y2 - ISO Factor11 1.31 Cg - Geometry Factor12 0.105