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Part Number X31308 - Y31308
Part Number X31308 - Y31308, 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
31308
Cone Part Number
X31308M
Cup Part Number
Y31308M
Design Unit
Metric
Cage Material
Stamped Steel
Related Assembly Number(s)
31308-90KA3
Dimensions
d - Bore
40
mm
1.5748
in
D - Cup Outer Diameter
90
mm
3.5433
in
B - Cone Width
23.000
mm
0.9055
in
C - Cup Width
17.000
mm
0.6693
in
T - Bearing Width
25.250
mm
0.9941
in
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius
1
2.030
mm
0.08
in
r - Cup Backface "To Clear" Radius
2
1.52
mm
0.06
in
da - Cone Frontface Backing Diameter
52
mm
2.05
in
db - Cone Backface Backing Diameter
61
mm
2.4
in
Da - Cup Frontface Backing Diameter
86.40
mm
3.40
in
Db - Cup Backface Backing Diameter
75.95
mm
2.99
in
Ab - Cage-Cone Frontface Clearance
3.8
mm
0.15
in
Aa - Cage-Cone Backface Clearance
3.3
mm
0.13
in
a - Effective Center Location
3
4.1
mm
0.16
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
26200
N
5890
lbf
C1 - Dynamic Radial Rating (1 million revolutions)
2
101000
N
22700
lbf
C0 - Static Radial Rating
88100
N
19800
lbf
C
a90
- Dynamic Thrust Rating (90 million revolutions)
3
37000
N
8320
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
0.71
e - ISO Factor
2
0.83
Y - ISO Factor
3
0.73
G1 - Heat Generation Factor (Roller-Raceway)
22.9
G2 - Heat Generation Factor (Rib-Roller End)
10.3
Cg - Geometry Factor
4
0.091
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
