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Part Number X30203 - Y30203
Part Number X30203 - Y30203, 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
30203
Cone Part Number
X30203
Cup Part Number
Y30203
Design Unit
Metric
Cage Material
Stamped Steel
Related Assembly Number(s)
30203-90KA1
Dimensions
d - Bore
17
mm
0.6693
in
D - Cup Outer Diameter
40
mm
1.5748
in
B - Cone Width
12.000
mm
0.4724
in
C - Cup Width
11.000
mm
0.4331
in
T - Bearing Width
13.250
mm
0.5217
in
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius
1
1.020
mm
0.040
in
r - Cup Backface "To Clear" Radius
2
1.02
mm
0.04
in
da - Cone Frontface Backing Diameter
21
mm
0.83
in
db - Cone Backface Backing Diameter
22
mm
0.87
in
Da - Cup Frontface Backing Diameter
37.59
mm
1.48
in
Db - Cup Backface Backing Diameter
35.05
mm
1.38
in
Ab - Cage-Cone Frontface Clearance
2
mm
0.08
in
Aa - Cage-Cone Backface Clearance
-0.3
mm
-0.01
in
a - Effective Center Location
3
-3.6
mm
-0.14
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
5530
N
1240
lbf
C1 - Dynamic Radial Rating (1 million revolutions)
2
21300
N
4800
lbf
C0 - Static Radial Rating
19900
N
4460
lbf
C
a90
- Dynamic Thrust Rating (90 million revolutions)
3
3270
N
735
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)
4.2
G2 - Heat Generation Factor (Rib-Roller End)
6
Cg - Geometry Factor
4
0.0398
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
