Single-row cylindrical roller bearings, NU, NJ, NUP and N types (including SKF Explorer)
NU / NJ / NUP / N 系列 (ECP 等) / SKF (Official website) / Listed on page 61 of the document
Dimensions, dynamic and static load ratings, fatigue load limits, speed ratings and masses of single-row cylindrical roller bearings with bore diameters from 40 mm to 105 mm. Includes SKF Explorer bearings.
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Specifications
| Inner diameter d | 40〜105 mm |
|---|---|
| Outer diameter D | 52〜250 mm |
| Basic dynamic load rating Cr | Max. 530 kN |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (Single-row cylindrical roller bearings, NU, NJ, NUP and N types (including SKF Explorer)).
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1. Bore and housing bore dimensions
This product: Inner diameter d 40〜105 mmSelect 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.
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2. Dynamic load rating based on life calculation
This product: Basic dynamic load rating Cr Max. 530 kNThe 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.
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3. Margin for static and shock loads
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.
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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.
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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.
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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.
Description
Covers single-row cylindrical roller bearings with bore diameters of 40 to 105 mm. Listed items include principal dimensions such as outside diameter and width, dynamic and static load ratings, fatigue load limit, reference speed and limiting speed, mass, designation, standard and alternative cage types, and mounting dimensions (including angular rings).
Features
- Wide bore range of 40 to 105 mm
- Includes SKF Explorer bearings
- Alternative cage options available
FAQ
- Q. For SKF NU, NJ, NUP and N type cylindrical roller bearings, what is the bore diameter range covered?
- A. Single-row cylindrical roller bearings with bore diameters from 40 mm to 105 mm are included.
- Q. For NU, NJ, NUP and N series single-row cylindrical roller bearings, which specification items are listed?
- A. Principal dimensions such as outside diameter and width, dynamic and static load ratings, fatigue load limit, reference speed and limiting speed, mass, designation, standard and alternative cage types, and mounting dimensions (including angular rings) are listed.
- Q. Are SKF Explorer bearings included among SKF single-row cylindrical roller bearings?
- A. Yes, SKF Explorer bearings are included.
- Q. What cage options are available for SKF single-row cylindrical roller bearings?
- A. Standard and alternative cage types are listed.
Written by AI based on the content of the source documents.
Source documents
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Catalog
SKF 円筒ころ軸受 (カタログ抜粋)
106 pages Open page 61
Found on: https://azuma-eg.com/catalogue/
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