All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial > Part Number NA87700SW - 87112D  

Part Number NA87700SW - 87112D, 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
NA87700SW

Cup Part Number
87112D

Design Unit
Inch


Dimensions

d - Bore
7 in
177.800 mm

D - Cup Outer Diameter
11.1250 in
282.575 mm

T - Bearing Width across Cones
4.25 in
107.95 mm

C - Double Cup Width
3.1250 in
79.375 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
7.87 in
200 mm

Da - Cup Frontface Backing Diameter
10.51 in
266.95 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

C1 - Dynamic Radial Rating (1 million revolutions)1
199000 lbf
886000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)2
21100 lbf
93900 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3
51700 lbf
230000 N
1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
2 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.
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.


Factors

K - Factor1
1.41

e - ISO Factor2
0.42

Y1 - ISO Factor3
1.62

Y2 - ISO Factor4
2.42
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