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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 420000

Cone Part Number

 N/A EE420800D

Cup Part Number

 N/A 421437

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A EE420800D-90022 EE420800D-902A3 EE420800D-904A1

Dimensions

d - Bore

 N/A 8 in

D - Cup Outer Diameter

 N/A 14.3720 in

B - Double Cone Width

 N/A 6.0000 in

C - Cup Width

 N/A 2.5 in

T - Bearing Width across Cups

 N/A 6.2499 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.13 in
r - Cup Backface "To Clear" Radius2 N/A 0.130 in

da - Cone Frontface Backing Diameter

 N/A 9.06 in

Db - Cup Backface Backing Diameter

 N/A 12.95 in

Ab - Cage-Cone Frontface Clearance

 N/A 0.14 in

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 64300 lbf286000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 432000 lbf1920000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 112000 lbf498000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 44200 lbf197000 N

Factors

K - Factor7 N/A 1.45
e - ISO Factor8 N/A 0.4
Y1 - ISO Factor9 N/A 1.68
Y2 - ISO Factor10 N/A 2.5

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 1150

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 128
Cg - Geometry Factor11 N/A 0.145

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.