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The configuration of the TDO provides a wide effective bearing spread, making it ideal for applications in which overturning moments are a significant load component. TDO bearings can be used in fixed positions or allowed to float in the housing bore.
Unit of Measure

Specifications

Series

 N/A L476500

Cone Part Number

 N/A L476549

Cup Part Number

 N/A L476510CD

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A L476549-902A1 L476549-902A2 L476549-902A3 L476549-903A1

Dimensions

d - Bore

 N/A 21.6250 in549.275 mm

D - Cup Outer Diameter

 N/A 27.2500 in692.150 mm

B - Cone Width

 N/A 3.1875 in80.963 mm

C - Double Cup Width

 N/A 5.3750 in136.525 mm

T - Bearing Width across Cones

 N/A 6.8749 in174.622 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.25 in6.4 mm
r - Cup Backface "To Clear" Radius2 N/A 0.06 in1.5 mm

db - Cone Backface Backing Diameter

 N/A 22.8 in579 mm

Da - Cup Frontface Backing Diameter

 N/A 26.34 in669.00 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.28 in7.1 mm
a - Effective Center Location3 N/A 1.27 in32.3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)4 N/A 88500 lbf394000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)5 N/A 595000 lbf2650000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)6 N/A 154000 lbf686000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)7 N/A 57000 lbf254000 N

Factors

K - Factor8 N/A 1.55
e - ISO Factor9 N/A 0.38
Y1 - ISO Factor10 N/A 1.79
Y2 - ISO Factor11 N/A 2.67
Cg - Geometry Factor12 N/A 0.257
  • 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.
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