Menu
Find Your Nearest Timken Sales Office or Authorized Distributor

Our locator tool helps you connect with the right Timken partner quickly. Registered users
can save their nearest Timken Sales office or distributor in their dashboard.

Try the Locator Tool
Analyze Bearing Performance in an Application with Timken ® Syber ® Bearing System Designer

A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

Learn More
Explore Timken Engineering Tools
Videos on YouTube

Check out our Engineering Tools video playlist on YouTube. These short walkthroughs
help you navigate Timken calculation tools, selection guides and digital resources.

View the Full Playlist
Batch CAD Cart (0) ▾
  • Cart is empty
  1. Click Here for Batch Download
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

Design Units

 N/A Imperial
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1 N/A 30400 lbf135000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2 N/A 7880 lbf35000 N

Dimensions

d - Cone Bore

 N/A 1 5/16 in33.338 mm

B - Cone Width

 N/A 1.09375 in27.781 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius3 N/A 0.09 in2.300 mm

db - Cone Backface Backing Diameter

 N/A 1.91 in48.5 mm

Ab - Cage-Cone Frontface Clearance

 N/A -0.0546875 in-1.38905 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.109375 in2.7781 mm
a - Effective Center Location4 N/A -0.08 in-2 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)5 N/A 4520 lbf20100 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 5170 lbf23000 N

Factors

K - Factor7 N/A 0.87
  • 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 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.
  • 7 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
By clicking Submit, you consent to the personal information you provide being used in the manner as described in our Privacy Notice, including access to that information by Timken personnel who may be located outside your home country. In addition, you agree that the CAD drawings are for your personal, one-time use only, and that you will not modify or create any compilation or derivative work using the CAD drawings or distribute or display the CAD drawings on any website or other media.