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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 LM772749DW - LM772710  
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Part Number LM772749DW - LM772710, 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

LM772700

Cone Part Number

LM772749DW

Cup Part Number

LM772710

Design Unit

Inch

Cage Material

Stamped Steel

Related Assembly Number(s)

LM772749DW-902A2
LM772749DW-902A3

LM772749DW-902A4

LM772749DW-902A5


Dimensions

d - Bore

19.2530 in
489.026
mm

D - Cup Outer Diameter

24.9950 in
634.873
mm

B - Double Cone Width

6.0625 in
153.988
mm

C - Cup Width

2.4375 in
61.913
mm

T - Bearing Width across Cups

6.0625 in
153.988
mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1

0.13 in
3.300
mm

r - Cup Backface "To Clear" Radius2

0.130 in
3.30
mm

da - Cone Frontface Backing Diameter

20.31 in
516
mm

Db - Cup Backface Backing Diameter

23.62 in
599.95
mm

Ab - Cage-Cone Frontface Clearance

0.19 in
4.8
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

108000 lbf
482000
N

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2

728000 lbf
3240000
N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3

189000 lbf
840000
N

Ca90 - Dynamic Thrust Rating (90 million revolutions)4

87800 lbf
390000
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

1.24

e - ISO Factor2

0.47

Y1 - ISO Factor3

1.43

Y2 - ISO Factor4

2.12

G1 - Heat Generation Factor (Roller-Raceway)

5450

Cg - Geometry Factor5

0.253
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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