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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number NA357 - 353D  
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Part Number NA357 - 353D, 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
NA357

Cup Part Number
353D

Design Unit
Inch


Dimensions

d - Bore
1.5748 in
40 mm

D - Cup Outer Diameter
3.5480 in
90.119 mm

T - Bearing Width across Cones
2 in
50.8 mm

C - Double Cup Width
1.7500 in
44.450 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.06 in
1.5 mm

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

db - Cone Backface Backing Diameter
1.93 in
49 mm

Da - Cup Frontface Backing Diameter
3.27 in
82.04 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
4770 lbf
21200 N

C1 - Dynamic Radial Rating (1 million revolutions)2
32000 lbf
142000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
2500 lbf
11100 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)4
8310 lbf
36900 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
1.91

e - ISO Factor2
0.31

Y1 - ISO Factor3
2.2

Y2 - ISO Factor4
3.28
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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