Series  55000 Cone Part Number  55187 Cup Part Number  55444D Design Units  Imperial Bearing Weight  6.2034 lb 2.8138 Kg Cage Type  Stamped Steel D - Cup Outer Diameter  4.4375 in 112.713 mm d - Cone Bore  1.8750 in 47.625 mm B - Cone Width  1.0594 in 26.909 mm C - Double Cup Width  1.8125 in 46.038 mm T - Bearing Width across Cones  2.5624 in 65.085 mm Z - Number of Rollers Per Row  16 Ka - Locking Pin Diameter  N/A Kb - Locking Pin Depth  N/A R - Cone Backface "To Clear" Radius1  0.140 in 3.600 mm r - Cup Frontface "To Clear" Radius2  0.06 in 1.5 mm db - Cone Backface Backing Diameter  2.72 in 69.10 mm Da - Cup Frontface Backing Diameter  4.15 in 105.40 mm Aa - Cage-Cone Backface Clearance  0.19 in 4.80 mm C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)1  7350 lbf 32700 N C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2  49400 lbf 220000 N C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3  12800 lbf 56900 N Ca90 - Dynamic Thrust Rating (90 million revolutions)4  11100 lbf 49500 N K - Factor1  0.66 e - ISO Factor2  2.71 Y1 - ISO Factor3  0.25 0.37 Y2 - ISO Factor4  0.37 G1 - Heat Generation Factor (Roller-Raceway)5  36.8 G2 - Heat Generation Factor (Rib-Roller End)  13.2 Cg - Geometry Factor6  0.109

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