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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

Bore d

 N/A 440 mm

Static Load Rating Co

 N/A 11400000 N2560000 lbf
Dynamic Load Rating C11 N/A 6620000 N1490000 lbf
Geometry Factor Cg2 N/A 0.3110

Thermal Speed Ratings - Oil

 N/A 370 rpm

Thermal Speed Ratings - Grease

 N/A 340 rpm

Bearing Dimensions

O.D. D

 N/A 720 mm28.3465 in

Width B

 N/A 280 mm11.0236 in

DUR/DOR F/E

 N/A 511 mm20.1181 in

Mounting Data

Chamfer rsmin

 N/A 6 mm0.24 in
Chamfer r1smin3 N/A 6 mm0.240 in

Backing Shaft Diameter ds

 N/A 497.4 mm19.5800 in

Backing Housing Diameter Ds

 N/A 661 mm26.0200 in

Lubrication Data

Lubrication Groove g

 N/A 25.3 mm1.00 in

Lubrication Hole Diameter h

 N/A 13.0 mm0.51 in

Number of Lubrication Holes

 N/A 12
Dimension S4 N/A 11.00 mm0.430 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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