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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.

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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.

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  • 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 320.000 mm

Static Load Rating Co

 N/A 2660000 N598000 lbf
Dynamic Load Rating C11 N/A 1270000 N285000 lbf
Geometry Factor Cg2 N/A 0.2160

Thermal Speed Ratings - Oil

 N/A 790 rpm

Thermal Speed Ratings - Grease

 N/A 710 rpm

Bearing Dimensions

O.D. D

 N/A 440 mm17.3228 in

Width B

 N/A 118 mm4.6457 in

DUR/DOR F/E

 N/A 359 mm14.1339 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 351 mm13.8200 in

Backing Housing Diameter Ds

 N/A 409 mm16.1000 in

Lubrication Data

Lubrication Groove g

 N/A 10.0 mm0.39 in

Lubrication Hole Diameter h

 N/A 5.0 mm0.20 in

Number of Lubrication Holes

 N/A 8
Dimension S4 N/A 5.20 mm0.200 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.
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