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
Print Back
  • 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 240 mm

O.D. (D)

 N/A 320 mm12.5984 in

Width (B)

 N/A 80 mm3.1496 in
Dynamic Radial Load Rating - 1M Revs (C1)1 N/A 591000 N133000 lbf

Other Dimensions

DUR/DOR F/E

 N/A 265 mm10.4331 in

Max Shaft Fillet Radius LF ID

 N/A 0.080 in2.1 mm

Max Shaft Fillet Radius RF ID

 N/A 0.080 in2.1 mm

Max Housing Fillet Radius LF OD

 N/A 0.08 in2.1 mm

Max Housing Fillet Radius RF OD

 N/A 0.08 in2.1 mm

Shaft Backing Shoulder Diameter

 N/A 260 mm10.2400 in

Housing Backing Shoulder Diameter

 N/A 299 mm11.7700 in

Ratings

Static Radial Load Rating (C0)

 N/A 1220000 N274000 lbf

Thermal Reference Speed - Oil 

 N/A 1200 rpm

Thermal Reference Speed - Grease 

 N/A 1100 rpm

Lubrication Data

Lubrication Groove g

 N/A 12.3 mm0.48 in

Lubrication Hole Diameter h

 N/A 6.0 mm0.24 in

Number of Lubrication Holes

 N/A 6
Dimension S2 N/A 3.90 mm0.150 in

Factors

Geometry Factor (Cg) 3 N/A 0.1650
  • 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 2 Permissible axial displacement from normal position of one bearing ring in relation to the other.
  • 3 Cg factor for bearing without inner ring.