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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TDI (Tapered Double Inner) > Tapered Roller Bearings - TDI (Tapered Double Inner) Imperial > Part Number M257149DW - M257110  
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Part Number M257149DW - M257110, Tapered Roller Bearings - TDI (Tapered Double Inner) Imperial


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: Imperial Metric Both

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

Specifications

Series
M257100

Cone Part Number
M257149DW

Cup Part Number
M257110

Design Unit
Inch

Cage Material
Stamped Steel

Related Assembly Number(s)
M257149DW-90016
M257149DW-90038
M257149DW-90042
M257149DW-90043
M257149DW-90044
M257149DW-90045
M257149DW-902A1
M257149DW-902A2
M257149DW-902A4


Dimensions

d - Bore
12 in
304.8 mm

D - Cup Outer Diameter
16.5 in
419.1 mm

B - Double Cone Width
5.1250 in
130.175 mm

C - Cup Width
2.1250 in
53.975 mm

T - Bearing Width across Cups
5.1250 in
130.175 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.06 in
1.5 mm

r - Cup Backface "To Clear" Radius2
0.250 in
6.4 mm

da - Cone Frontface Backing Diameter
12.68 in
322 mm

Db - Cup Backface Backing Diameter
15.43 in
391.90 mm

Ab - Cage-Cone Frontface Clearance
0.18 in
4.6 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.


Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)1
69700 lbf
310000 N

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2
468000 lbf
2080000 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3
121000 lbf
540000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)4
39700 lbf
176000 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
1.76

e - ISO Factor2
0.33

Y1 - ISO Factor3
2.03

Y2 - ISO Factor4
3.02

G1 - Heat Generation Factor (Roller-Raceway)
2160

G2 - Heat Generation Factor (Rib-Roller End)
303

Cg - Geometry Factor5
0.167
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.


Spacer

Note
Spacer shows standard nominal .01 radii, actual bearing may vary


 MORE IMAGES 

·  Timken_TRB_2ROWASSY_TDI_39585D-90015-A

·  Timken_TRB_2ROWASSY_TDI_39585D-90015-A3

·  Timken_TRB_2ROWASSY_TDI_39585D-90015-T2



 DOWNLOADS 

Bearing Life Calculation Tool

Bearing Dimensional Tolerances

Tools and Guides for Engineers

TRB TDI Line Drawing
(JPG, 14KB)


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