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TDI bearings have a one-piece double inner race and two single outer races and are typically supplied complete with an outer race spacer as a pre-set assembly. The bearing can be used at fixed positions on rotation shaft applications. For rotating housing application it can be used to float on the stationary shaft.
Unit of Measure

Specifications

Series

 N/A 71000

Cone Part Number

 N/A 71426D

Cup Part Number

 N/A 71750

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A 71426D-902A1 71426D-902A2

Dimensions

d - Bore

 N/A 4.25 in107.95 mm

D - Cup Outer Diameter

 N/A 7.5 in190.5 mm

B - Double Cone Width

 N/A 4.0000 in101.600 mm

C - Cup Width

 N/A 1.3750 in34.925 mm

T - Bearing Width across Cups

 N/A 3.8749 in98.422 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.06 in1.5 mm
r - Cup Backface "To Clear" Radius2 N/A 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 N/A 4.8 in122 mm

Db - Cup Backface Backing Diameter

 N/A 6.73 in170.94 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.1 in2.5 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 21200 lbf94300 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 142000 lbf633000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 36900 lbf164000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 15100 lbf67100 N

Factors

K - Factor7 N/A 1.4
e - ISO Factor8 N/A 0.42
Y1 - ISO Factor9 N/A 1.62
Y2 - ISO Factor10 N/A 2.42
Cg - Geometry Factor11 N/A 0.116

Spacer

Note

 N/A Spacer shows standard nominal .01 radii, actual bearing may vary
  • 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 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 4 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 5 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.
  • 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 Geometry constant for Lubrication Life Adjustment Factor a3l.
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