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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number NA44156 - 44348D  
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Part Number NA44156 - 44348D, 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
NA44156

Cup Part Number
44348D

Design Unit
Inch


Dimensions

d - Bore
1.5625 in
39.688 mm

D - Cup Outer Diameter
3.4843 in
88.501 mm

T - Bearing Width across Cones
2.1875 in
55.562 mm

C - Double Cup Width
1.5625 in
39.688 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.09 in
2.300 mm

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

db - Cone Backface Backing Diameter
2.2 in
56 mm

Da - Cup Frontface Backing Diameter
3.34 in
84.84 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
4910 lbf
21800 N

C1 - Dynamic Radial Rating (1 million revolutions)2
32900 lbf
147000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
6560 lbf
29200 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)4
8540 lbf
38000 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
0.75

e - ISO Factor2
0.78

Y1 - ISO Factor3
0.86

Y2 - ISO Factor4
1.29
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.


 MORE IMAGES 

·  timken-TNA-cutaway-angle-view

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