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Unit of Measure
Items
Timken_TRB_2ROWASSY_TDO_438-90092-A2

Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial
Timken_TRB_2ROWASSY_TDO_438-90092-A2

Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial
Timken_TRB_2ROWASSY_TDO_438-90092-A2

Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial
Timken_TRB_2ROWASSY_TDO_438-90092-A2

Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial
Timken_TRB_2ROWASSY_TDO_438-90092-A2

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
Ca90 - 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 Ca90 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 Ca90 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 Ca90 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.