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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 EE291250 - 291751CD  
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Part Number EE291250 - 291751CD, 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
290000

Cone Part Number
EE291250

Cup Part Number
291751CD

Design Unit
Inch

Cage Material
Stamped Steel

Related Assembly Number(s)
EE291250-90090
EE291250-90091
EE291250-90092
EE291250-90093
EE291250-902A2
EE291250-902A3
EE291250-902A5
EE291250-902B1
EE291250-902B2


Dimensions

d - Bore
12.5000 in
317.500 mm

D - Cup Outer Diameter
17.5 in
444.5 mm

B - Cone Width
2.4375 in
61.913 mm

C - Double Cup Width
3.8750 in
98.425 mm

T - Bearing Width across Cones
5.7499 in
146.047 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.310 in
7.900 mm

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

db - Cone Backface Backing Diameter
13.62 in
346 mm

Da - Cup Frontface Backing Diameter
16.34 in
415.04 mm

Aa - Cage-Cone Backface Clearance
0.4 in
10.2 mm

a - Effective Center Location3
0.3 in
7.6 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
51700 lbf
230000 N

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2
347000 lbf
1540000 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3
90000 lbf
400000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)4
33400 lbf
149000 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
1.55

e - ISO Factor2
0.38

Y1 - ISO Factor3
1.79

Y2 - ISO Factor4
2.66

Cg - Geometry Factor5
0.156
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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Bearing Life Calculation Tool

Bearing Dimensional Tolerances

Tools and Guides for Engineers


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