Series  2800 Cone Part Number  2878 Cup Part Number  2821 Design Units  Imperial Bearing Weight  1.0000 lb 0.4000 Kg Cage Type  Stamped Steel D - Cup Outer Diameter  2.8750 in 73.025 mm d - Cone Bore  1.3750 in 34.925 mm B - Cone Width  0.9375 in 23.813 mm C - Cup Width  0.6875 in 17.463 mm T - Bearing Width  0.8750 in 22.225 mm Z - Number of Rollers Per Row  17 R - Cone Backface "To Clear" Radius1  0.030 in 0.760 mm r - Cup Backface "To Clear" Radius2  0.030 in 0.76 mm da - Cone Frontface Backing Diameter  1.61 in 40.89 mm db - Cone Backface Backing Diameter  1.65 in 41.91 mm Da - Cup Frontface Backing Diameter  2.72 in 68.10 mm Db - Cup Backface Backing Diameter  2.56 in 65.02 mm Ab - Cage-Cone Frontface Clearance  0.01 in 0.25 mm Aa - Cage-Cone Backface Clearance  0.04 in 1.02 mm a - Effective Center Location3  -0.22 in -5.60 mm C90 - Dynamic Radial Rating (90 million revolutions)1  4260 lbf 19000 N C1 - Dynamic Radial Rating (1 million revolutions)2  16400 lbf 73200 N C0 - Static Radial Rating  18800 lbf 83800 N Ca90 - Dynamic Thrust Rating (90 million revolutions)3  2690 lbf 12000 N K - Factor1  1.59 e - ISO Factor2  0.37 Y - ISO Factor3  1.63 G1 - Heat Generation Factor (Roller-Raceway)  23.1 G2 - Heat Generation Factor (Rib-Roller End)  12.4 Cg - Geometry Factor  0.0718

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