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Part Number NA71450 - 71751D, 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
NA71450

Cup Part Number
71751D

Related Assembly Number(s)
NA71450-90066

Design Unit
Inch


Dimensions

d - Bore
4 1/2 in
114.300 mm

D - Cup Outer Diameter
7.5 in
190.5 mm

T - Bearing Width across Cones
4.1875 in
106.362 mm

C - Double Cup Width
3.1875 in
80.963 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
5.2 in
132 mm

Da - Cup Frontface Backing Diameter
7.17 in
182.12 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
21200 lbf
94300 N

C1 - Dynamic Radial Rating (1 million revolutions)2
142000 lbf
633000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
15100 lbf
67100 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)4
36900 lbf
164000 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
1.40

e - ISO Factor2
0.42

Y1 - ISO Factor3
1.62

Y2 - ISO Factor4
2.42
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

·  timken-TNA-left-angle-view

·  Timken TRB TNA



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