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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 Asymmetrical

Cone Part Number

 N/A 48680D

Cup Part Number

 N/A 48620

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A 48680D-90045 48680D-90057 48680D-90085 48680D-90090 48680D-902A6 48680D-902A7 48680D-902A8 48680D-902A9 48680D-902B2

Dimensions

d - Bore

 N/A 5 1/2 in139.700 mm

D - Cup Outer Diameter

 N/A 7.875 in200.025 mm

B - Double Cone Width

 N/A 2.9688 in75.408 mm

C - Cup Width

 N/A 1.3437 in34.13 mm

T - Bearing Width across Cups

 N/A 3.0625 in77.788 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 in0.762 mm

da - Cone Frontface Backing Diameter

 N/A 5.91 in150.10 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.12 in3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 74300 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 112000 lbf499000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 29100 lbf129000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 9610 lbf42800 N

Factors

K - Factor7 N/A 1.74
e - ISO Factor8 N/A 0.34
Y1 - ISO Factor9 N/A 2.01
Y2 - ISO Factor10 N/A 2.99
Cg - Geometry Factor11 N/A 0.126

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.