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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 775

Cone Part Number

 N/A 782D

Cup Part Number

 N/A 772A

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 4.1250 in104.775 mm

D - Cup Outer Diameter

 N/A 6.8750 in174.625 mm

B - Double Cone Width

 N/A 4.0300 in102.362 mm

C - Cup Width

 N/A 1.5000 in38.100 mm

T - Bearing Width across Cups

 N/A 4.0000 in101.600 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 4.643 in117.93 mm

Db - Cup Backface Backing Diameter

 N/A 6.22 in157.99 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.07 in1.8 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 20200 lbf89700 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 135000 lbf603000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 35100 lbf156000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 13300 lbf59200 N

Factors

K - Factor7 N/A 1.51
e - ISO Factor8 N/A 0.39
Y1 - ISO Factor9 N/A 1.75
Y2 - ISO Factor10 N/A 2.61

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 227

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 41.3
Cg - Geometry Factor11 N/A 0.107

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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