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Part Number LM446349NW - LM446310D, Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial

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

Specifications

Cone Part Number
LM446349NW

Cup Part Number
LM446310D

Design Unit
Inch


Dimensions

d - Bore
9.25 in
234.95 mm

D - Cup Outer Diameter
12.25 in
311.15 mm

T - Bearing Width across Cones
4 in
101.6 mm

C - Double Cup Width
2.875 in
73.025 mm


Abutment and Fillet Dimensions

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

r - Cup Backface "To Clear" Radius2
0.030 in
0.8 mm

db - Cone Backface Backing Diameter
9.92 in
252.0 mm

Da - Cup Frontface Backing Diameter
11.97 in
304.00 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
25700 lbf
114000 N

C1 - Dynamic Radial Rating (1 million revolutions)2
173000 lbf
768000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
15900 lbf
70900 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)4
44800 lbf
199000 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
1.61

e - ISO Factor2
0.36

Y1 - ISO Factor3
1.86

Y2 - ISO Factor4
2.77
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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