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Single-Row Cylindrical Roller Bearing

NU型・N型・NJ型・NUP型 / SKF (Official website) / Listed on page 5 of the document

Separable single-row cylindrical roller bearing. Available in NU, N, NJ and NUP basic designs differing in flange configuration, supporting axial shaft location or axial displacement absorption.

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Single-Row Cylindrical Roller Bearing on page 5 of SKF "SKF 円筒ころ軸受 (カタログ抜粋)"
Source: SKF「SKF 円筒ころ軸受 (カタログ抜粋)」page 5
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Specifications

Taper hole taper ratio 1:12
Inner diameter d 105〜800 mm
Outer diameter D 120〜1150 mm
Basic dynamic load rating Cr 28〜11200 kN
Basic static load rating C0r 34〜16750 kN

How to choose Rolling Bearings

Points to check when selecting, with the values for this product (Single-Row Cylindrical Roller Bearing).

  1. 1. Bore and housing bore dimensions

    This product: Inner diameter d 105〜800 mm

    Select the bore diameter d to match the shaft seat, the outside diameter D to match the housing bore, and the width B to suit the installation space. Main dimensions are standardized in ISO and JIS dimension series, so interchangeable products can be found by boundary dimension designation. For tapered roller bearings, also check the assembled width T; for thrust bearings, also check the height H.

  2. 2. Dynamic load rating based on life calculation

    This product: Basic dynamic load rating Cr 28〜11200 kN

    The basic dynamic load rating Cr is the reference value for calculating rated life. Verify that the required life is met using the equivalent load during operation and the rotational speed. For ball bearings, life is proportional to the cube of the load ratio, so providing load margin greatly extends life.

  3. 3. Margin for static and shock loads

    This product: Basic static load rating C0r 34〜16750 kN

    The basic static load rating C0r is the allowable standard for permanent deformation generated at the rolling elements and raceways under stationary or low-speed conditions. For applications with oscillating motion or shock loads, confirm that a static safety factor against the maximum load is secured using C0r.

  4. 4. Operating speed and lubrication method

    The limiting speed differs by lubrication method, and separate values are given for grease lubrication and oil lubrication. Confirm that the normal operating speed does not exceed the limiting value, and in high-speed ranges also consider cage material and precision grade. The reference speed can also be consulted as a thermal guideline.

  5. 5. Precision grade and internal clearance

    Precision grades (P0, P6, P5, etc.) indicate rotational accuracy and dimensional accuracy; for high-precision applications such as machine tool spindles, select higher grades. Internal clearance (C2, CN, C3, etc.) is selected to allow for changes caused by interference fit and temperature differences during operation.

  6. 6. Materials and lubrication suited to the environment

    For corrosive, high-temperature, vacuum, or clean environments, select specifications such as rings and rolling elements made of stainless steel or ceramics, or solid lubricants and fluorine grease for vacuum use. Check the operating temperature range, low dust generation, and whether food-grade grease registration applies against the application conditions.

This guide was written by AI based on the listed products' documents and specification items.

About Rolling Bearings and all products

Description

The inner or outer ring with rollers and cage can be separated from the other ring, allowing easy mounting and dismounting even when both rings require an interference fit. Derived specifications include angle rings, tapered bore, snap ring groove, and locating slot.

Features

  • Separable design for easy mounting and dismounting
  • Logarithmic profile rollers reduce edge stress
  • Interchangeable component configuration
  • Derived specifications available with tapered bore (1:12), snap ring groove, and locating slot

Applications

  • Shaft support in industrial machinery
  • Axial displacement absorption of shaft relative to housing

FAQ

Q. What axial shaft location or displacement absorption do single-row cylindrical roller bearings (NU, N, NJ, and NUP types) support?
A. Basic designs NU, N, NJ, and NUP differ in flange configuration and support axial shaft location or axial displacement absorption.
Q. Can single-row cylindrical roller bearings be mounted and dismounted when both rings require an interference fit?
A. Yes. The inner or outer ring with rollers and cage can be separated from the other ring, allowing easy mounting and dismounting even when both rings require an interference fit.
Q. What are the ranges of bore diameter d, outside diameter D, basic dynamic load rating Cr, and basic static load rating C0r for single-row cylindrical roller bearings?
A. Bore diameter d is 105 to 800 mm, outside diameter D is 120 to 1150 mm, basic dynamic load rating Cr is 28 to 11200 kN, and basic static load rating C0r is 34 to 16750 kN.
Q. What derived specifications are available for single-row cylindrical roller bearings, and what is the taper ratio of the tapered bore?
A. Derived specifications include angle rings, tapered bore, snap ring groove, and locating slot. The taper ratio of the tapered bore is 1:12.
Q. What is the shape of the rollers in single-row cylindrical roller bearings (NU, N, NJ, and NUP types), and what effect does it have?
A. The rollers have a logarithmic profile, which reduces edge stress.

Written by AI based on the content of the source documents.

Source documents

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