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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TDO (Tapered Double Outer) > Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial > Part Number EE129120X - 129173D  
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Part Number EE129120X - 129173D, Tapered Roller Bearings - TDO (Tapered Double Outer) Imperial


The configuration of the TDO provides a wide effective bearing spread, making it ideal for applications in which overturning moments are a significant load component. TDO bearings can be used in fixed positions or allowed to float in the housing bore.



Unit of Measure: Imperial Metric Both

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

Specifications

Series
129000

Cone Part Number
EE129120X

Cup Part Number
129173D

Design Unit
Inch

Cage Material
Stamped Steel


Dimensions

d - Bore
12 in
304.8 mm

D - Cup Outer Diameter
17.246 in
438.048 mm

B - Cone Width
3.0312 in
76.992 mm

C - Double Cup Width
4.7500 in
120.650 mm

T - Bearing Width across Cones
6.4999 in
165.097 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.25 in
6.4 mm

r - Cup Backface "To Clear" Radius2
0.06 in
1.5 mm

db - Cone Backface Backing Diameter
13.15 in
334 mm

Da - Cup Frontface Backing Diameter
16.3 in
414.00 mm

Aa - Cage-Cone Backface Clearance
0.56 in
14.2 mm

a - Effective Center Location3
0.29 in
7.4 mm
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 Negative value indicates effective center inside cone backface.


Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)1
52200 lbf
232000 N

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2
351000 lbf
1560000 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3
91000 lbf
405000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)4
37200 lbf
165000 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
1.4

e - ISO Factor2
0.42

Y1 - ISO Factor3
1.62

Y2 - ISO Factor4
2.42

Cg - Geometry Factor5
0.171
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
4 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
5 Geometry constant for Lubrication Life Adjustment Factor a3l.


 MORE IMAGES 

·  Timken_TRB_2ROWASSY_TDO_438-90092-A

·  Timken_TRB_2ROWASSY_TDO_438-90092-A3

·  Timken_TRB_2ROWASSY_TDO_438-90092-T2



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