Montage of Timken Bearing Products 
Search Catalog
        
 All Product Types    Tapered Roller Bearings - TS (Tapered Single) Metric
View Cart View RFQs Express Ordering  | Shipping 
 | Tax 
 | Terms
 Shopping Cart 0 Items
 Request for Quote 0 Items
All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TS (Tapered Single) > Tapered Roller Bearings - TS (Tapered Single) Metric > Part Number 30238  
Download PDF Download PDF     Printable Page     Email Email This Page     Save To Favorites Save To Favorites
Add To Cart Request Quote

Part Number 30238, 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
30238

Cone Part Number
X30238

Cup Part Number
Y30238

Design Unit
Metric

Cage Material
Stamped Steel


Dimensions

d - Bore
190 mm
7.4803 in

D - Cup Outer Diameter
340 mm
13.3858 in

B - Cone Width
55 mm
2.1654 in

C - Cup Width
46 mm
1.811 in

T - Bearing Width
60.000 mm
2.3622 in


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
5 mm
0.200 in

r - Cup Backface "To Clear" Radius2
4 mm
0.16 in

da - Cone Frontface Backing Diameter
214.9 mm
8.43 in

db - Cone Backface Backing Diameter
222 mm
8.7 in

Da - Cup Frontface Backing Diameter
318.5 mm
12.54 in

Db - Cup Backface Backing Diameter
310 mm
12.2 in

Ab - Cage-Cone Frontface Clearance
10.7 mm
0.42 in

Aa - Cage-Cone Backface Clearance
3.8 mm
0.15 in

a - Effective Center Location3
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
273000 N
61400 lbf

C1 - Dynamic Radial Rating (1 million revolutions)2
1050000 N
237000 lbf

C0 - Static Radial Rating
1390000 N
312000 lbf

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
203000 N
45700 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
1.34

e - ISO Factor2
0.44

Y - ISO Factor3
1.38

G1 - Heat Generation Factor (Roller-Raceway)
940.6

G2 - Heat Generation Factor (Rib-Roller End)
103.1

Cg - Geometry Factor4
0.139
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


Add To Cart Request Quote
<