Series  L521900 Cone Part Number  L521949 Cup Part Number  L521910DC Design Units  Imperial Bearing Weight  4.6912 lb 2.1279 Kg Cage Type  Stamped Steel D - Cup Outer Diameter  5.7500 in 146.050 mm d - Cone Bore  4.2500 in 107.950 mm B - Cone Width  0.8438 in 21.433 mm C - Double Cup Width  1.5625 in 39.688 mm T - Bearing Width across Cones  1.9374 in 49.210 mm Z - Number of Rollers Per Row  39 Ka - Locking Pin Diameter  0.5 in 12.7 mm Kb - Locking Pin Depth  0.156 in 4 mm R - Cone Backface "To Clear" Radius1  0.060 in 1.500 mm r - Cup Frontface "To Clear" Radius2  0.03 in 0.8 mm db - Cone Backface Backing Diameter  4.57 in 116.10 mm Da - Cup Frontface Backing Diameter  5.57 in 141.48 mm Aa - Cage-Cone Backface Clearance  0.03 in 0.80 mm C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)1  5180 lbf 23100 N C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2  34800 lbf 155000 N C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3  9020 lbf 40100 N Ca90 - Dynamic Thrust Rating (90 million revolutions)4  3480 lbf 15500 N K - Factor1  1.49 e - ISO Factor2  0.84 Y1 - ISO Factor3  0.80 1.19 Y2 - ISO Factor4  1.19 G1 - Heat Generation Factor (Roller-Raceway)5  152 G2 - Heat Generation Factor (Rib-Roller End)  108 Cg - Geometry Factor6  0.135

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