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Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial
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Tapered Roller Bearings
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Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial
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Part Number NA08125 - 08231D
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Part Number NA08125 - 08231D, Tapered Roller Bearings - TNA (Tapered Double, non-adjustable) Imperial
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Unit of Measure:
Imperial
Metric
Both
Specifications
·
Dimensions
·
Abutment and Fillet Dimensions
·
Basic Load Ratings
·
Factors
Specifications
Cone Part Number
NA08125
Cup Part Number
08231D
Design Unit
Inch
Dimensions
d - Bore
1.2500
in
31.750
mm
D - Cup Outer Diameter
2.3125
in
58.738
mm
T - Bearing Width across Cones
1.2812
in
32.542
mm
C - Double Cup Width
0.9688
in
24.608
mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius
1
0.06
in
1.5
mm
r - Cup Backface "To Clear" Radius
2
0.020
in
0.40
mm
db - Cone Backface Backing Diameter
1.52
in
38.5
mm
Da - Cup Frontface Backing Diameter
2.20
in
55.12
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
1850
lbf
8220
N
C1 - Dynamic Radial Rating (1 million revolutions)
2
12400
lbf
55200
N
C
a90
- Dynamic Thrust Rating (90 million revolutions)
3
1500
lbf
6670
N
C90
(2)
- Dynamic Radial Rating (Two-Row, 90 million revolutions)
4
3220
lbf
14300
N
1
Based on 90 x 10
6
revolutions L
10
life, for The Timken Company life calculation method. C
90
and C
a90
are radial and thrust values.
2
Based on 1 x 10
6
revolutions L
10
life, for the ISO life calculation method.
3
Based on 90 x 10
6
revolutions L
10
life, for The Timken Company life calculation method. C
90
and C
a90
are radial and thrust values for a single-row, C
90(2)
is the two-row radial value.
4
Based on 90 x 10
6
revolutions L
10
life, for The Timken Company life calculation method. C
90
and C
a90
are radial and thrust values for a single-row, C
90(2)
is the two-row radial value.
Factors
K - Factor
1
1.23
e - ISO Factor
2
0.47
Y1 - ISO Factor
3
1.42
Y2 - ISO Factor
4
2.12
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
·
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·
timken-TNA-left-angle-view
·
Timken TRB TNA
VIEW CAD DRAWING
·
3D
·
2D Sectional View
·
2D Sales Drawing
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