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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

Key Dimensions

Static Load Rating Co

 N/A 10120000 N2280000 lbf
Dynamic Load Rating C11 N/A 4040000 N907000 lbf
Geometry Factor Cg2 N/A 0.3650

Thermal Speed Ratings - Oil

 N/A 290 rpm

Thermal Speed Ratings - Grease

 N/A 270 rpm

Bearing Dimensions

O.D. D

 N/A 31.4961 in

Width B

 N/A 7.874 in

DUR/DOR F/E

 N/A 26.2205 in

Mounting Data

Chamfer rsmin

 N/A 0.200 in
Chamfer r1smin3 N/A 0.200 in

Backing Shaft Diameter ds

 N/A 25.7900 in

Backing Housing Diameter Ds

 N/A 29.5300 in

Lubrication Data

Lubrication Groove g

 N/A 1.00 in

Lubrication Hole Diameter h

 N/A 0.51 in

Number of Lubrication Holes

 N/A 12
Dimension S4 N/A 0.270 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.