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Tapered Roller Bearings - TSL (DUO-FACE® Plus Seal) Imperial
Unit of Measure

Specifications

Cone Part Number

 N/A 479

Cup Part Number

 N/A 472A

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 2.6250 in

D - Cup Outer Diameter

 N/A 4.7244 in

B - Cone Width

 N/A 1.1420 in

C - Cup Width

 N/A 0.9230 in

T - Bearing Width

 N/A 1.1418 in

T1 - Total Width

 N/A 1.2720 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.09 in
r - Cup Backface "To Clear" Radius2 N/A 0.130 in

da - Cone Frontface Backing Diameter

 N/A 2.91 in

db - Cone Backface Backing Diameter

 N/A 3.07 in

Db - Cup Backface Backing Diameter

 N/A 4.17 in
a - Effective Center Location3 N/A -0.16 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 8360 lbf37200 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 32200 lbf143000 N

C0 - Static Radial Rating

 N/A 41900 lbf186000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 5500 lbf24500 N

Factors

K - Factor7 N/A 1.52
e - ISO Factor8 N/A 0.38
Y - ISO Factor9 N/A 1.56
Y1 - ISO Factor10 N/A 1.75
Y2 - ISO Factor11 N/A 2.61

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 77.2

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 23
Cg - Geometry Factor12 N/A 0.108
  • 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 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 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.