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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number HM252348NA - HM252315CD  
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Part Number HM252348NA - HM252315CD, 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

HM252348NA

Cup Part Number

HM252315CD

Design Unit

Inch


Dimensions

d - Bore

10.2500 in
260.350
mm

D - Cup Outer Diameter

16.9970 in
431.724
mm

T - Bearing Width across Cones

6.8125 in
173.038
mm

C - Double Cup Width

5.0625 in
128.588
mm

Ka

1.13 in
28.58
mm

Kb

0.47 in
11.91
mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1

0.25 in
6.4
mm

r - Cup Backface "To Clear" Radius2

0.06 in
1.5
mm

db - Cone Backface Backing Diameter

11.46 in
291.0
mm

Da - Cup Frontface Backing Diameter

15.73 in
399.50
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

87400 lbf
389000
N

C1 - Dynamic Radial Rating (1 million revolutions)2

587000 lbf
2610000
N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3

49700 lbf
221000
N

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

152000 lbf
677000
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

1.76

e - ISO Factor2

0.33

Y1 - ISO Factor3

2.03

Y2 - ISO Factor4

3.02
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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