Series  72000 Cone Part Number  72187 Cup Part Number  72488D Design Units  Imperial Bearing Weight  9.2862 lb 4.2121 Kg Cage Type  Stamped Steel D - Cup Outer Diameter  4.8750 in 123.825 mm d - Cone Bore  1.8750 in 47.625 mm B - Cone Width  1.2910 in 32.791 mm C - Double Cup Width  2.1875 in 55.563 mm T - Bearing Width across Cones  3.0624 in 77.785 mm Z - Number of Rollers Per Row  14 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  2.83 in 71.90 mm Da - Cup Frontface Backing Diameter  4.56 in 115.82 mm Aa - Cage-Cone Backface Clearance  0.21 in 5.30 mm C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)1  8910 lbf 39600 N C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2  59800 lbf 266000 N C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3  15500 lbf 69000 N Ca90 - Dynamic Thrust Rating (90 million revolutions)4  11200 lbf 50000 N K - Factor1  0.79 e - ISO Factor2  1.94 Y1 - ISO Factor3  0.35 0.52 Y2 - ISO Factor4  0.52 G1 - Heat Generation Factor (Roller-Raceway)5  47.7 G2 - Heat Generation Factor (Rib-Roller End)  14.1 Cg - Geometry Factor6  0.0772

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