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Part Number 32972
Part Number 32972, Tapered Roller Bearings - TS (Tapered Single) Metric
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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
32972M
Cone Part Number
X32972M
Cup Part Number
Y32972M
Design Unit
Metric
Cage Material
Stamped Steel
Related Assembly Number(s)
32972M-90KM1
32972M-90WM5
Dimensions
d - Bore
360.000
mm
14.1732
in
D - Cup Outer Diameter
480
mm
18.8976
in
B - Cone Width
76
mm
2.9921
in
C - Cup Width
57
mm
2.2441
in
T - Bearing Width
76.000
mm
2.9921
in
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius
1
4.060
mm
0.16
in
r - Cup Backface "To Clear" Radius
2
3.05
mm
0.12
in
da - Cone Frontface Backing Diameter
378
mm
14.88
in
db - Cone Backface Backing Diameter
385
mm
15.16
in
Da - Cup Frontface Backing Diameter
466.10
mm
18.39
in
Db - Cup Backface Backing Diameter
451.10
mm
17.76
in
Ab - Cage-Cone Frontface Clearance
5.8
mm
0.23
in
Aa - Cage-Cone Backface Clearance
9.4
mm
0.37
in
a - Effective Center Location
3
20.6
mm
0.81
in
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
324000
N
72800
lbf
C1 - Dynamic Radial Rating (1 million revolutions)
2
1250000
N
281000
lbf
C0 - Static Radial Rating
2780000
N
624000
lbf
C
a90
- Dynamic Thrust Rating (90 million revolutions)
3
254000
N
57100
lbf
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
1.27
e - ISO Factor
2
0.46
Y - ISO Factor
3
1.31
G1 - Heat Generation Factor (Roller-Raceway)
2984.5
G2 - Heat Generation Factor (Rib-Roller End)
344.6
Cg - Geometry Factor
4
0.206
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
