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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 30205  
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Part Number 30205, 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
30205M

Cone Part Number
X30205M

Cup Part Number
Y30205M

Design Unit
Metric

Cage Material
Stamped Steel

Related Assembly Number(s)
30205M-90KM1
30205M-90NM1


Dimensions

d - Bore
25 mm
0.9843 in

D - Cup Outer Diameter
52 mm
2.0472 in

B - Cone Width
15.000 mm
0.5906 in

C - Cup Width
13.000 mm
0.5118 in

T - Bearing Width
16.250 mm
0.6398 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
31 mm
1.22 in

db - Cone Backface Backing Diameter
32.5 mm
1.28 in

Da - Cup Frontface Backing Diameter
49.00 mm
1.93 in

Db - Cup Backface Backing Diameter
45.47 mm
1.79 in

Ab - Cage-Cone Frontface Clearance
2.3 mm
0.09 in

Aa - Cage-Cone Backface Clearance
0 mm
0 in

a - Effective Center Location3
-3.8 mm
-0.15 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
9570 N
2150 lbf

C1 - Dynamic Radial Rating (1 million revolutions)2
36900 N
8300 lbf

C0 - Static Radial Rating
38300 N
8620 lbf

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
6150 N
1380 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)
9

G2 - Heat Generation Factor (Rib-Roller End)
8

Cg - Geometry Factor4
0.0529
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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