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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number NA52375 - 52637D  
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Part Number NA52375 - 52637D, 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

NA52375

Cup Part Number

52637D

Related Assembly Number(s)

NA52375-90024

Design Unit

Inch


Dimensions

d - Bore

3 3/4 in
95.250
mm

D - Cup Outer Diameter

6-3/8 in
161.925
mm

T - Bearing Width across Cones

3.2499 in
82.547
mm

C - Double Cup Width

2.4375 in
61.913
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

4.41 in
112
mm

Da - Cup Frontface Backing Diameter

6.08 in
153.92
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

13000 lbf
57900
N

C1 - Dynamic Radial Rating (1 million revolutions)2

87500 lbf
389000
N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3

10600 lbf
47100
N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)4

22700 lbf
101000
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

1.23

e - ISO Factor2

0.47

Y1 - ISO Factor3

1.42

Y2 - ISO Factor4

2.12
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



 DOWNLOADS 

Bearing Life Calculation Tool

Bearing Dimensional Tolerances

Tools and Guides for Engineers


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