All Product Types > ENGINEERED BEARINGS > Cylindrical Roller Bearings > Cylindrical Roller Radial Bearings - Two-Row > Part Number NNU4988MAW33  

Part Number NNU4988MAW33, Cylindrical Roller Radial Bearings - Two-Row

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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.




Specifications  · Bearing Dimensions  · Mounting Data  · Lubrication Data

Specifications

Bore d
440 mm

Static Load Rating Co
5740000 N
1292000 lbf

Dynamic Load Rating C11
2500000 N
562000 lbf

Geometry Factor Cg2
0.2860

Thermal Speed Ratings - Oil
460 rpm

Thermal Speed Ratings - Grease
420 rpm
1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
2 Cg factor for bearing without inner ring.


Bearing Dimensions

O.D. D
600 mm
23.6220 in

Width B
160 mm
6.2992 in

DUR/DOR F/E
490 mm
19.2913 in


Mounting Data

Chamfer rsmin
4 mm
0.16 in

Chamfer r1smin1
4 mm
0.160 in

Backing Shaft Diameter ds
480.4 mm
18.9100 in

Backing Housing Diameter Ds
558 mm
21.9700 in
1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.


Lubrication Data

Lubrication Groove g
16.0 mm
0.63 in

Lubrication Hole Diameter h
8.0 mm
0.31 in

Number of Lubrication Holes
10

Dimension S1
6.80 mm
0.270 in
1 Permissible axial displacement from normal position of one bearing ring in relation to the other.


 MORE IMAGES 

·  timken-CRB-NN-Brass-Cage-Large-left-angle-view

·  timken-CRB-NN-Brass-Cage-Large-cutaway-view

·  timken-CRB-NN-Brass-Cage-Large-top-angle-view



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Catalog and Technical Information - Cylindrical Roller Bearings