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
  • Additional radial load-carrying capability compared to single-row product.
  • Designed to ISO/DIN specified interchangeable dimensions.
  • Sold as complete assembly.

NNU-1
  • Outer rings with solid ribs.
  • Lubrication grooves and holes on outer rings.
  • One solid brass cage.

The radial internal clearance (RIC) for the bearing assembly must be included when ordering the complete assembly.
Unit of Measure

Key Dimensions

Bore d

 N/A 300 mm

Static Load Rating Co

 N/A 2380000 N536000 lbf
Dynamic Load Rating C11 N/A 1170000 N263000 lbf
Geometry Factor Cg2 N/A 0.2050

Thermal Speed Ratings - Oil

 N/A 880 rpm

Thermal Speed Ratings - Grease

 N/A 780 rpm

Bearing Dimensions

O.D. D

 N/A 420 mm16.5354 in

Width B

 N/A 118 mm4.6457 in

DUR/DOR F/E

 N/A 339 mm13.3465 in

Mounting Data

Chamfer rsmin

 N/A 3 mm0.12 in
Chamfer r1smin3 N/A 3 mm0.120 in

Backing Shaft Diameter ds

 N/A 330.4 mm13.0100 in

Backing Housing Diameter Ds

 N/A 389 mm15.3100 in

Lubrication Data

Lubrication Groove g

 N/A 19.3 mm0.76 in

Lubrication Hole Diameter h

 N/A 9.5 mm0.37 in

Number of Lubrication Holes

 N/A 8
Dimension S4 N/A 5.30 mm0.210 in
  • 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 2 Cg factor for bearing without inner ring.
  • 3 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 4 Permissible axial displacement from normal position of one bearing ring in relation to the other.
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.