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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TS (Tapered Single) > Tapered Roller Bearings - TS (Tapered Single) Metric > Part Number X30206CM - Y30206CM  
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Part Number X30206CM - Y30206CM, Tapered Roller Bearings - TS (Tapered Single) Metric


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.



Unit of Measure: Imperial Metric Both

Specifications  · Dimensions  · Abutment and Fillet Dimensions  · Basic Load Ratings  · Factors

Specifications

Series
30206C

Cone Part Number
X30206CM

Cup Part Number
Y30206CM

Design Unit
Metric

Cage Material
Stamped Steel

Related Assembly Number(s)
30206M-90KM1
30206M-90KM3


Dimensions

d - Bore
30 mm
1.1811 in

D - Cup Outer Diameter
62 mm
2.4409 in

B - Cone Width
16 mm
0.6299 in

C - Cup Width
14 mm
0.5512 in

T - Bearing Width
17.25 mm
0.6693 in


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
1.020 mm
0.040 in

r - Cup Backface "To Clear" Radius2
1.02 mm
0.04 in

da - Cone Frontface Backing Diameter
36.5 mm
1.44 in

db - Cone Backface Backing Diameter
38 mm
1.5 in

Da - Cup Frontface Backing Diameter
58.42 mm
2.30 in

Db - Cup Backface Backing Diameter
55.12 mm
2.17 in

Ab - Cage-Cone Frontface Clearance
2.8 mm
0.11 in

Aa - Cage-Cone Backface Clearance
0 mm
0 in

a - Effective Center Location3
-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
12800 N
2880 lbf

C1 - Dynamic Radial Rating (1 million revolutions)2
49300 N
11100 lbf

C0 - Static Radial Rating
51800 N
11600 lbf

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
8210 N
1850 lbf
1 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
2 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
3 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.


Factors

K - Factor1
1.56

e - ISO Factor2
0.37

Y - ISO Factor3
1.6

G1 - Heat Generation Factor (Roller-Raceway)
13.4

G2 - Heat Generation Factor (Rib-Roller End)
10.7

Cg - Geometry Factor4
0.0601
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.



 DOWNLOADS 

Tapered Roller Bearing Engineering Information
(PDF, 663KB)

Bearing Life Calculation Tool

Bearing Dimensional Tolerances


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