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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - Single Cones > Tapered Roller Bearings - Single Cones - Metric > Part Number X30309M  
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Part Number X30309M, Tapered Roller Bearings - Single Cones - 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
30309M

Cone Part Number
X30309M

Design Units
METRIC

Cage Type
Stamped Steel

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1
225000 N
50500 lbf

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2
58300 N
13100 lbf

Full Timken Part Number
30309
1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
2 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.


Dimensions

d - Cone Bore
45 mm
1.7717 in

B - Cone Width
25.000 mm
0.9843 in


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
2.030 mm
0.08 in

da - Cone Frontface Backing Diameter
56 mm
2.2 in

db - Cone Backface Backing Diameter
59 mm
2.32 in

Ab - Cage-Cone Frontface Clearance
4.3 mm
0.17 in

Aa - Cage-Cone Backface Clearance
0.3 mm
0.01 in

a - Effective Center Location2
-6.1 mm
-0.24 in
1 These maximum fillet radii will be cleared by the bearing corners.
2 Negative value indicates effective center inside cone backface.


Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)1
33500 N
7530 lbf

C1 - Dynamic Radial Rating (1 million revolutions)2
129000 N
29000 lbf

C0 - Static Radial Rating
139000 N
31300 lbf

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
19800 N
4450 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
1.69

G1 - Heat Generation Factor (Roller-Raceway)
41.9

G2 - Heat Generation Factor (Rib-Roller End)
18.4

Cg - Geometry Factor2
0.0851
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 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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