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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number LM249747NW - LM249710CD  
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Part Number LM249747NW - LM249710CD, Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial






Unit of Measure: Imperial Metric Both

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

Specifications

Cone Part Number
LM249747NW

Cup Part Number
LM249710CD

Design Unit
Inch


Dimensions

d - Bore
9.999 in
253.975 mm

D - Cup Outer Diameter
13.6875 in
347.663 mm

T - Bearing Width across Cones
4 in
101.6 mm

C - Double Cup Width
2.75 in
69.85 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.14 in
3.5 mm

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

db - Cone Backface Backing Diameter
10.71 in
272 mm

Da - Cup Frontface Backing Diameter
13.15 in
334.00 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 (90 million revolutions)1
35700 lbf
159000 N

C1 - Dynamic Radial Rating (1 million revolutions)2
240000 lbf
1070000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
20300 lbf
90500 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)4
62200 lbf
277000 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
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.


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·  timken-TNASWE-cutaway-angle-view



 DOWNLOADS 

Bearing Life Calculation Tool

Bearing Dimensional Tolerances

Tools and Guides for Engineers


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