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Part Number 67985D, Tapered Roller Bearings - Double Tapered Cones - Imperial

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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.




Specifications  · Dimensions  · Abutment and Fillet Dimensions  · Basic Load Ratings  · Factors

Specifications

Series
67900

Cone Part Number
67985D

Design Units
Imperial

Cage Type
Stamped Steel

C1 - Dynamic Radial Rating (1 million revolutions)1
95300 lbf
424000 N

C0 - Static Radial Rating
197000 lbf
876000 N
1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.


Dimensions

d - Cone Bore
8.1250 in
206.375 mm

B - Double Cone Width
3.4375 in
87.313 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.03 in
0.800 mm

da - Cone Frontface Backing Diameter
8.62 in
219 mm

Ab - Cage-Cone Frontface Clearance
0.11 in
2.8 mm
1 These maximum fillet radii will be cleared by the bearing corners.


Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)1
24700 lbf
110000 N

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2
166000 lbf
738000 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3
43000 lbf
191000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)4
21500 lbf
95800 N
1 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
2 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
3 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.
4 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.


Factors

K - Factor1
1.15

G1 - Heat Generation Factor (Roller-Raceway)
820

G2 - Heat Generation Factor (Rib-Roller End)
172

Cg - Geometry Factor2
0.139
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 Geometry constant for Lubrication Life Adjustment Factor a3l.



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