All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number HM252348NA - HM252311D  

Part Number HM252348NA - HM252311D, Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial

    Download PDF Download PDF   
    border="0" Printable Page  
    Email Email This Page  
    Save To Favorites Save To Favorites
  






Specifications  · Dimensions  · Abutment and Fillet Dimensions  · Basic Load Ratings  · Factors

Specifications

Cone Part Number
HM252348NA

Cup Part Number
HM252311D

Design Unit
Inch


Dimensions

d - Bore
10.2500 in
260.350 mm

D - Cup Outer Diameter
16.6250 in
422.275 mm

T - Bearing Width across Cones
6.8125 in
173.038 mm

C - Double Cup Width
5.0625 in
128.588 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
15.79 in
399.54 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