Series  A4000 Cone Part Number  A4049 Cup Part Number  A4138D Design Units  Imperial Bearing Weight  0.2722 lb 0.1235 Kg Cage Type  Stamped Steel D - Cup Outer Diameter  1.3775 in 34.989 mm d - Cone Bore  0.4992 in 12.680 mm B - Cone Width  0.4326 in 10.988 mm C - Double Cup Width  0.8125 in 20.638 mm T - Bearing Width across Cones  0.9910 in 25.171 mm Z - Number of Rollers Per Row  12 Ka - Locking Pin Diameter  N/A Kb - Locking Pin Depth  N/A R - Cone Backface "To Clear" Radius1  0.030 in 0.800 mm r - Cup Frontface "To Clear" Radius2  0.03 in 0.6 mm db - Cone Backface Backing Diameter  0.69 in 17.50 mm Da - Cup Frontface Backing Diameter  1.26 in 32.00 mm Aa - Cage-Cone Backface Clearance  0.01 in 0.30 mm C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)1  767 lbf 3410 N C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2  5150 lbf 22900 N C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3  1330 lbf 5940 N Ca90 - Dynamic Thrust Rating (90 million revolutions)4  594 lbf 2640 N K - Factor1  1.29 e - ISO Factor2  1 Y1 - ISO Factor3  0.68 1.01 Y2 - ISO Factor4  1.01 G1 - Heat Generation Factor (Roller-Raceway)5  2.3 G2 - Heat Generation Factor (Rib-Roller End)  4.12 Cg - Geometry Factor6  0.0355

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