Series  385 Cone Part Number  389DE Cup Part Number  383A Design Units  Imperial Bearing Weight  3.4000 lb 1.5000 Kg Cage Type  Stamped Steel D - Cup Outer Diameter  3.9370 in 100.000 mm d - Cone Bore  2.1875 in 55.563 mm B - Double Cone Width  2.0940 in 53.188 mm C - Cup Width  0.7018 in 17.826 mm T - Bearing Width across Cups  2.0195 in 51.295 mm Z - Number of Rollers Per Row  19 R - Cone Frontface "To Clear" Radius1  0.030 in 0.80 mm r - Cup Backface "To Clear" Radius2  0.080 in 2.00 mm da - Cone Frontface Backing Diameter  2.44 in 62.00 mm Db - Cup Backface Backing Diameter  3.50 in 88.90 mm Ab - Cage-Cone Frontface Clearance  0.07 in 1.80 mm C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)1  5300 lbf 23600 N C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2  35600 lbf 158000 N C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3  9230 lbf 41100 N Ca90 - Dynamic Thrust Rating (90 million revolutions)4  3210 lbf 14300 N K - Factor1  1.65 e - ISO Factor2  0.75 Y1 - ISO Factor3  0.90 Y2 - ISO Factor4  1.34 G1 - Heat Generation Factor (Roller-Raceway)5  42 G2 - Heat Generation Factor (Rib-Roller End)  15.7 Cg - Geometry Factor6  0.0859

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