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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number NA776SW - 774D  
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Part Number NA776SW - 774D, 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
NA776SW

Cup Part Number
774D

Design Unit
Inch


Dimensions

d - Bore
3 3/4 in
95.250 mm

D - Cup Outer Diameter
7-1/8 in
180.975 mm

T - Bearing Width across Cones
4.125 in
104.775 mm

C - Double Cup Width
3.3750 in
85.725 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
4.49 in
114 mm

Da - Cup Frontface Backing Diameter
6.65 in
168.90 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
20200 lbf
89700 N

C1 - Dynamic Radial Rating (1 million revolutions)2
135000 lbf
603000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
13300 lbf
59200 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)4
35100 lbf
156000 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
1.51

e - ISO Factor2
0.39

Y1 - ISO Factor3
1.75

Y2 - ISO Factor4
2.61
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-TNASW-left-angle-view

·  timken-TNASW-cutaway-angle-view

·  Timken TRB TNASW



 DOWNLOADS 

Bearing Life Calculation Tool

Bearing Dimensional Tolerances

Tools and Guides for Engineers


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