Aerospace / Military
Aerospace Series General Aviation Rod Ends Spherical Bearings Mil Spec Series Rod Ends Spherical Bearings Bushings Approved Part Numbers
Commercial / Industrial
Rod End Bearings Inch Rod Ends Metric Rod Ends Spherical Bearings Inch Spherical Bearings Metric Spherical Bearings
Technical Resources
Terms and Definitions Articles Technical Data FAQs Key Term Translation Custom Engineered Products
Online Catalog
Engineers power search our entire catalog of bearing and bushings, with access to every attribute and technical specification possible. View our online catalog...
CAD (0) ▾
  • Cart is empty
  1. Request CAD files
Request Information Add to CAD Cart
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

Specifications

Series

 N/A 33208

Cone Part Number

 N/A X33208

Design Units

 N/A METRIC

Cage Type

 N/A Stamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1 N/A 249000 N56100 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2 N/A 64700 N14500 lbf

Full Timken Part Number

 N/A 33208

Dimensions

d - Cone Bore

 N/A 40 mm1.5748 in

B - Cone Width

 N/A 32.000 mm1.2598 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius3 N/A 1.520 mm0.06 in

da - Cone Frontface Backing Diameter

 N/A 47 mm1.85 in

db - Cone Backface Backing Diameter

 N/A 51 mm2.01 in

Ab - Cage-Cone Frontface Clearance

 N/A 3 mm0.12 in

Aa - Cage-Cone Backface Clearance

 N/A 2.3 mm0.09 in
a - Effective Center Location4 N/A -10.9 mm-0.43 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)5 N/A 37100 N8350 lbf
C1 - Dynamic Radial Rating (1 million revolutions)6 N/A 143000 N32200 lbf

C0 - Static Radial Rating

 N/A 144000 N32400 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)7 N/A 22700 N5110 lbf

Factors

K - Factor8 N/A 1.63

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 35.9

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 11.4
Cg - Geometry Factor9 N/A 0.0827
  • 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.
  • 3 These maximum fillet radii will be cleared by the bearing corners.
  • 4 Negative value indicates effective center inside cone backface.
  • 5 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 6 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 7 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.
  • 8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 9 Geometry constant for Lubrication Life Adjustment Factor a3l.