The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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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 280 mm

Static Load Rating Co

 N/A 4820000 N1084000 lbf
Dynamic Load Rating C11 N/A 2940000 N660000 lbf
Geometry Factor Cg2 N/A 0.2190

Thermal Speed Ratings - Oil

 N/A 990 rpm

Thermal Speed Ratings - Grease

 N/A 910 rpm

Bearing Dimensions

O.D. D

 N/A 460 mm18.1102 in

Width B

 N/A 180 mm7.0866 in

DUR/DOR F/E

 N/A 326 mm12.8346 in

Mounting Data

Chamfer rsmin

 N/A 5 mm0.200 in
Chamfer r1smin3 N/A 5 mm0.200 in

Backing Shaft Diameter ds

 N/A 318.9 mm12.5600 in

Backing Housing Diameter Ds

 N/A 422 mm16.6100 in

Lubrication Data

Lubrication Groove g

 N/A 16.0 mm0.63 in

Lubrication Hole Diameter h

 N/A 7.5 mm0.29 in

Number of Lubrication Holes

 N/A 8
Dimension S4 N/A 6.30 mm0.280 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.