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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 385

Cone Part Number

 N/A 389DE

Cup Part Number

 N/A 382A

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 2 3/16 in55.563 mm

D - Cup Outer Diameter

 N/A 3.8125 in96.838 mm

B - Double Cone Width

 N/A 2.0940 in53.188 mm

C - Cup Width

 N/A 0.6250 in15.875 mm

T - Bearing Width across Cups

 N/A 2.0195 in51.295 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.03 in0.800 mm
r - Cup Backface "To Clear" Radius2 N/A 0.030 in0.76 mm

da - Cone Frontface Backing Diameter

 N/A 2.48 in63 mm

Db - Cup Backface Backing Diameter

 N/A 3.50 in88.90 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.11 in2.8 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 5300 lbf23600 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 35600 lbf158000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 9230 lbf41100 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 3210 lbf14300 N

Factors

K - Factor7 N/A 1.65
e - ISO Factor8 N/A 0.35
Y1 - ISO Factor9 N/A 1.91
Y2 - ISO Factor10 N/A 2.84

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 42

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 15.7
Cg - Geometry Factor11 N/A 0.0859

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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