Menu
Smarter Bearing Selection Is Here

The Timken® Syber® Bearing System Designer Tool now features Smart Selection, enabling users to find the right bearing faster by filtering options based on target life and key dimensions.

Learn More
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
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

Specifications

Bore d

 N/A 670 mm

Static Load Rating Co

 N/A 18840000 N4236000 lbf
Dynamic Load Rating C11 N/A 9740000 N2190000 lbf
Geometry Factor Cg2 N/A 0.4040

Thermal Speed Ratings - Oil

 N/A 210 rpm

Thermal Speed Ratings - Grease

 N/A 200 rpm

Bearing Dimensions

O.D. D

 N/A 980 mm38.5827 in

Width B

 N/A 308 mm12.1260 in

DUR/DOR F/E

 N/A 744 mm29.2913 in

Mounting Data

Chamfer rsmin

 N/A 7.5 mm0.300 in
Chamfer r1smin3 N/A 7.5 mm0.300 in

Backing Shaft Diameter ds

 N/A 726.9 mm28.6200 in

Backing Housing Diameter Ds

 N/A 922 mm36.3000 in

Lubrication Data

Lubrication Groove g

 N/A 22.0 mm0.87 in

Lubrication Hole Diameter h

 N/A 12.0 mm0.47 in

Number of Lubrication Holes

 N/A 16
Dimension S4 N/A 13.00 mm0.510 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.