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Part Number A4049 - A4138
Part Number A4049 - A4138, Tapered Roller Bearings - TS (Tapered Single) Imperial
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This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.
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Specifications
·
Dimensions
·
Abutment and Fillet Dimensions
·
Basic Load Ratings
·
Factors
Specifications
Series
A4000
Cone Part Number
A4049
Cup Part Number
A4138
Design Unit
Inch
Cage Material
Stamped Steel
Dimensions
d - Bore
0.4992
in
12.680
mm
D - Cup Outer Diameter
1.3775
in
34.989
mm
B - Cone Width
0.4326
in
10.988
mm
C - Cup Width
0.3437
in
8.730
mm
T - Bearing Width
0.4330
in
10.998
mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius
1
0.03
in
0.800
mm
r - Cup Backface "To Clear" Radius
2
0.050
in
1.27
mm
da - Cone Frontface Backing Diameter
0.69
in
17.5
mm
db - Cone Backface Backing Diameter
0.69
in
17.5
mm
Da - Cup Frontface Backing Diameter
1.28
in
32.51
mm
Db - Cup Backface Backing Diameter
1.14
in
28.96
mm
Ab - Cage-Cone Frontface Clearance
0.07
in
1.8
mm
Aa - Cage-Cone Backface Clearance
0
in
0
mm
a - Effective Center Location
3
-0.1
in
-2.5
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.
3
Negative value indicates effective center inside cone backface.
Basic Load Ratings
C90 - Dynamic Radial Rating (90 million revolutions)
1
767
lbf
3410
N
C1 - Dynamic Radial Rating (1 million revolutions)
2
2960
lbf
13200
N
C0 - Static Radial Rating
2580
lbf
11500
N
C
a90
- Dynamic Thrust Rating (90 million revolutions)
3
594
lbf
2640
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.
Factors
K - Factor
1
1.29
e - ISO Factor
2
0.45
Y - ISO Factor
3
1.32
G1 - Heat Generation Factor (Roller-Raceway)
2.3
G2 - Heat Generation Factor (Rib-Roller End)
4.12
Cg - Geometry Factor
4
0.0355
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
Geometry constant for Lubrication Life Adjustment Factor a3l.
VIEW CAD DRAWING
·
3D
·
2D ISO View
·
2D Sales Drawing
DOWNLOADS
Tapered Roller Bearing Engineering Information
(PDF, 663KB)
Bearing Life Calculation Tool
Bearing Dimensional Tolerances
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