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Full-complement Cylindrical Roller Bearings

 Overview

Cylindrical Roller Bearings

In bearings of this type, the cylindrical rollers are in linear contact with the raceways. They have a high radial load capacity and are suitable for high speeds.

There are different types designated as NU, NJ, NUP, N, NF (for single-row bearings), NNU, and NN (for double-row bearings depending on the design or absence of side ribs).

The outer and inner rings of all types are separable.

Some cylindrical roller bearings have no ribs on either the inner or outer ring, so the rings can move axially relative to each other. These can be used as free-end bearings. Cylindrical roller bearings, in which either the inner or outer rings has two ribs and the other ring has one, are capable of taking some axial load in one direction Double-row cylindrical roller bearings have high radial rigidity and are used primarily for precision machine tools.

Pressed steel or machined brass cages are generally used, but sometimes molded polyamide cages are also used.

Depending on the existence of ribs on their rings, Cylindrical Roller Bearings are classified into the following types:

Types NU, N, NNU, and NN are suitable as free-end bearings. Types NJ and NF can sustain limited axial loads in one direction. Types NH and NUP can be used as fixed-end bearings.

NH-type cylindrical roller bearings consist of the NJ-type cylindrical roller bearings and HJ-type L-shaped thrust collars.

The inner ring loose rib of an NUP-type cylindrical roller bearing should be mounted so that the marked side is on the outside.

 

 Product List

Cylindrical Roller Bearings (Machined Brass Cages)
                                          NSK has high load rating "EM
                                          Series"
 

Cylindrical Roller Bearings for Sheaves

Features

1.    Improved seal: Contact seal 
       increases resistance to entry
       of water or foreign
       substances.

2.    High load capacity: When
       used as a sheave bearing,
       radial and axial load
       capacities are increased

3.    Corrosion resistance:
       Phosphate surface treatment
       improves resistance to rust.

4.    Easy to apply grease: Holes
       provided on inner ring
       facilitate grease
       replenishment, even while the
       bearing is mounted.

5.    Fewer surrounding parts:
       With snap rings for the outer
       ring, fewer parts are required
       around the bearing for a more
       cost-effective sheave.

 Related Industries

You can download the 2D / 3D CAD data of NSK products.

2D/3D CAD Data (PART Community)

  
   This is the free CAD data download service produced by CADENAS WEB2CAD, Inc.
   This service can provide designers with 2D and 3D data for mechanical parts.

 

 

 CAD

Rolling Bearings: pp. B84-B109 (306 KB)PDF

To find more titles of our catalogs, please follow the link below.
Downloads (Catalogs and CAD drawings)

 Documents

Cylindrical Roller Bearings (Pressed Steel Cages)
                                          NSK has high load rating "EW
                                          Series"
 

Cageless, full-complement cylindrical roller bearings have the maximum possible number of rollers and can sustain much heavier loads than cylindrical roller bearings of the same size with cages. On the other hand, high-speed capability is inferior to the bearings with cages.
The open-type single- and double-row bearings are mostly used in general industrial applications at low speed and under heavy load, and the shielded-type double-row bearings are often used in crane sheaves.
    >> Table 1

Cylindrical Roller Bearings (Molded Polyamide Cages)
Bearings with molded polyamide cages (ET type) can be used continuously at temperatures between -40 and 120oC. If the bearings are used in gear oil, nonflammable hydraulic oil or ester oil at a high temperature over 100oC, please contact NSK beforehand.

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