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Part Number 30312
Part Number 30312, 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
30312M
Cone Part Number
X30312M
Cup Part Number
Y30312M
Design Unit
Metric
Cage Material
Stamped Steel
Related Assembly Number(s)
30312-9X025
30312-9X245
Dimensions
d - Bore
60
mm
2.3622
in
D - Cup Outer Diameter
130
mm
5.1181
in
B - Cone Width
31.000
mm
1.2205
in
C - Cup Width
26.000
mm
1.0236
in
T - Bearing Width
33.500
mm
1.3189
in
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius
1
3.050
mm
0.12
in
r - Cup Backface "To Clear" Radius
2
2.54
mm
0.1
in
da - Cone Frontface Backing Diameter
69
mm
2.72
in
db - Cone Backface Backing Diameter
74
mm
2.91
in
Da - Cup Frontface Backing Diameter
121.90
mm
4.80
in
Db - Cup Backface Backing Diameter
116.08
mm
4.57
in
Ab - Cage-Cone Frontface Clearance
4.8
mm
0.19
in
Aa - Cage-Cone Backface Clearance
1.8
mm
0.07
in
a - Effective Center Location
3
-7.1
mm
-0.28
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
56500
N
12700
lbf
C1 - Dynamic Radial Rating (1 million revolutions)
2
218000
N
49000
lbf
C0 - Static Radial Rating
221000
N
49800
lbf
C
a90
- Dynamic Thrust Rating (90 million revolutions)
3
33400
N
7510
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
1.69
e - ISO Factor
2
0.35
Y - ISO Factor
3
1.74
G1 - Heat Generation Factor (Roller-Raceway)
75.8
G2 - Heat Generation Factor (Rib-Roller End)
22.2
Cg - Geometry Factor
4
0.0668
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
