The Timken Company - Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial

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Unit of Measure

Items	02875 - 02823D Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial	02876 - 02823D Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial	02877 - 02823D Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial	02878 - 02823D Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial	02872 - 02823D Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial
Series	N/A 2800
Cone Part Number	N/A 02875	N/A 02876	N/A 02877	N/A 02878	N/A 02872
Cup Part Number	N/A 02823D
d - Bore	N/A 1 1/4 in31.75 mm	N/A 1 1/4 in31.75 mm	N/A 1 3/8 in34.925 mm	N/A 1 3/8 in34.925 mm	N/A 1 1/8 in28.575 mm
D - Cup Outer Diameter	N/A 3 in76.2 mm
B - Cone Width	N/A 0.875 in22.225 mm
C - Double Cup Width	N/A 1.5000 in38.100 mm
Design Unit	N/A Inch
T - Bearing Width across Cones	N/A 1.8750 in47.625 mm
R - Cone Backface "To Clear" Radius¹	N/A 0.03 in0.800 mm
r - Cup Backface "To Clear" Radius²	N/A 0.030 in0.8 mm
db - Cone Backface Backing Diameter	N/A 1.79 in45.5 mm	N/A 1.57 in40 mm	N/A 1.91 in48.5 mm	N/A 1.67 in42.5 mm	N/A 1.48 in37.5 mm
Da - Cup Frontface Backing Diameter	N/A 2.80 in71.10 mm
Db - Cup Backface Backing Diameter	N/A
Aa - Cage-Cone Backface Clearance	N/A 0.03 in0.8 mm
a - Effective Center Location³	N/A -0.15 in-3.8 mm
Bearing Weight	N/A 2.32 lb1.051 Kg	N/A 2.34 lb1.061 Kg	N/A 2.19 lb0.992 Kg	N/A 2.210 lb1.003 Kg	N/A 2.46 lb1.118 Kg
Cage Material	N/A Stamped Steel
C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)⁴	N/A 3830 lbf17000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)⁵	N/A 25700 lbf114000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)⁶	N/A 6670 lbf29700 N
C_a90 - Dynamic Thrust Rating (90 million revolutions)⁷	N/A 2980 lbf13200 N
K - Factor⁸	N/A 1.29
e - ISO Factor⁹	N/A 0.45
Y1 - ISO Factor¹⁰	N/A 1.49
Y2 - ISO Factor¹¹	N/A 2.21
Cg - Geometry Factor¹²	N/A 0.074
Full Timken Part Number	N/A 02875-90052	N/A 02876-902A1	N/A 02877-90048	N/A 02878-90025	N/A 02872-90029
¹ These maximum fillet radii will be cleared by the bearing corners. ² These maximum fillet radii will be cleared by the bearing corners. ³ Negative value indicates effective center inside cone backface. ⁴ Based on 90 x 10⁶ revolutions L₁₀ life, for The Timken Company life calculation method. C₉₀ and C_a90 are radial and thrust values. ⁵ Based on 1 x 10⁶ revolutions L₁₀ life, for the ISO life calculation method. ⁶ Based on 90 x 10⁶ revolutions L₁₀ life, for The Timken Company life calculation method. C₉₀ and C_a90 are radial and thrust values for a single-row, C₉₀₍₂₎ is the two-row radial value. ⁷ Based on 90 x 10⁶ revolutions L₁₀ life, for The Timken Company life calculation method. C₉₀ and C_a90 are radial and thrust values for a single-row, C₉₀₍₂₎ is the two-row radial value. ⁸ These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use. ⁹ These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use. ¹⁰ These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use. ¹¹ These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use. ¹² Geometry constant for Lubrication Life Adjustment Factor a3l.