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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number NA67885SW - 67820CD  
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Part Number NA67885SW - 67820CD, 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
NA67885SW

Cup Part Number
67820CD

Design Unit
Inch


Dimensions

d - Bore
7.5 in
190.5 mm

D - Cup Outer Diameter
10.5 in
266.7 mm

T - Bearing Width across Cones
4.3125 in
109.538 mm

C - Double Cup Width
3.3125 in
84.138 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
8.23 in
209 mm

Da - Cup Frontface Backing Diameter
10.25 in
260.35 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
24300 lbf
108000 N

C1 - Dynamic Radial Rating (1 million revolutions)2
163000 lbf
725000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
19800 lbf
88200 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)4
42300 lbf
188000 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
1.22

e - ISO Factor2
0.48

Y1 - ISO Factor3
1.41

Y2 - ISO Factor4
2.11
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

·  timken-TNASWE-left-angle-view

·  timken-TNASWE-cutaway-angle-view



 DOWNLOADS 

Bearing Life Calculation Tool

Bearing Dimensional Tolerances

Tools and Guides for Engineers


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