Montage of Timken Bearing Products 
Search Catalog
        
 All Product Types    Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial
View Cart View RFQs Express Ordering  | Shipping 
 | Tax 
 | Terms
 Shopping Cart 0 Items
 Request for Quote 0 Items
All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number NA558 - 552D  
Download PDF Download PDF     Printable Page     Email Email This Page     Save To Favorites Save To Favorites
Add To Cart Request Quote

Part Number NA558 - 552D, 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
NA558

Cup Part Number
552D

Related Assembly Number(s)
NA558-90041

Design Unit
Inch


Dimensions

d - Bore
2 3/8 in
60.325 mm

D - Cup Outer Diameter
4-7/8 in
123.825 mm

T - Bearing Width across Cones
3.125 in
79.375 mm

C - Double Cup Width
2.5 in
63.5 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.14 in
3.5 mm

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

db - Cone Backface Backing Diameter
2.99 in
76 mm

Da - Cup Frontface Backing Diameter
4.56 in
115.82 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
11100 lbf
49400 N

C1 - Dynamic Radial Rating (1 million revolutions)2
74700 lbf
332000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
65900 lbf
29300 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)4
19400 lbf
86100 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
1.69

e - ISO Factor2
0.35

Y1 - ISO Factor3
1.95

Y2 - ISO Factor4
2.9
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


Add To Cart Request Quote
<