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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number NA55200 - 55444D  
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Part Number NA55200 - 55444D, 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
NA55200

Cup Part Number
55444D

Design Unit
Inch


Dimensions

d - Bore
2 in
50.8 mm

D - Cup Outer Diameter
4.4375 in
112.713 mm

T - Bearing Width across Cones
2.5625 in
65.088 mm

C - Double Cup Width
1.8125 in
46.038 mm


Abutment and Fillet Dimensions

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

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

db - Cone Backface Backing Diameter
2.72 in
69 mm

Da - Cup Frontface Backing Diameter
4.15 in
105.40 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
6200 lbf
27600 N

C1 - Dynamic Radial Rating (1 million revolutions)2
41600 lbf
185000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
9380 lbf
41700 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)4
10800 lbf
48000 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
0.66

e - ISO Factor2
0.88

Y1 - ISO Factor3
0.76

Y2 - ISO Factor4
1.14
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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·  Timken TRB TNA



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