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Single-Row Cylindrical Roller Bearings NU/NJ/NUP/N Type ECP Series (d 15–50 mm)

NU・NJ・NUP・N ..ECP 系列 / SKF (Official website) / Listed on page 55 of the document

A series of single-row cylindrical roller bearings that primarily support radial loads, with a choice of one-side or flanged inner and outer ring combinations. Available in bore diameters of 15 to 50 mm, with selectable cage types.

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Single-Row Cylindrical Roller Bearings NU/NJ/NUP/N Type ECP Series (d 15–50 mm) on page 55 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 55
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Specifications

Inner diameter d 15〜50 mm
Outer diameter D 35〜120 mm
Basic dynamic load rating Cr 12.5〜160 kN
Basic static load rating C0r 10.2〜153 kN
Limiting speed (grease lubrication) 6 700〜26 000 r/min
Mass 0.047〜1.65 kg
Axial load limit (constant, other than series 2) 0.0023 D^1.7

How to choose Rolling Bearings

Points to check when selecting, with the values for this product (Single-Row Cylindrical Roller Bearings NU/NJ/NUP/N Type ECP Series (d 15–50 mm)).

  1. 1. Bore and housing bore dimensions

    This product: Inner diameter d 15〜50 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 12.5〜160 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 10.2〜153 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

    This product: Limiting speed (grease lubrication) 6 700〜26 000 r/min

    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

Product data for single-row cylindrical roller bearings with bore diameters of 15 to 50 mm, summarizing dimensions, basic load ratings, limiting speeds, and mass. Combinations of standard cages and alternative cages are shown, and angle ring dimensions are also listed. Permissible axial load values are limited by formulas and upper limits to prevent flange fracture. Some SKF Explorer bearings are included.

Features

  • Supports radial loads
  • Flanges can accept axial loads (limited)
  • Choice of standard or alternative cage
  • Some bearings are SKF Explorer bearings

Applications

  • Shaft support in industrial machinery
  • High-speed rotating parts such as gearboxes and motors

FAQ

Q. From what bore diameter to what bore diameter can single-row cylindrical roller bearings in the NU, NJ, NUP, and N ECP series be selected?
A. The bore diameter d is 15 to 50 mm.
Q. How much axial load can single-row cylindrical roller bearings in the NU, NJ, NUP, and N ECP series withstand?
A. To prevent flange fracture, permissible axial load is limited by formulas and upper limits. The continuous upper limit, except for two series, is 0.0023 D^1.7.
Q. How can the cage be selected for single-row cylindrical roller bearings in the NU, NJ, NUP, and N ECP series?
A. You can choose either a standard cage or an alternative cage.
Q. Are there SKF Explorer bearings among the single-row cylindrical roller bearings in the NU, NJ, NUP, and N ECP series?
A. Some of them are SKF Explorer bearings.

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

Source documents

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