NNCL Type Double-Row Full Complement Cylindrical Roller Bearing
NNCL / SKF (Official website)
Double-row full complement cylindrical roller bearing with bore diameter of 60 to 400 mm. The outer ring has no flange, and it is used for axial positioning applications.
Last verified: (date the content was verified against the source document)
Specifications
| Inner diameter d | 60〜400 mm |
|---|---|
| Outer diameter D | 85〜600 mm |
| Width B | 25〜272 mm |
| Basic dynamic load rating Cr | 78.1〜5500 kN |
| Limiting speed (grease lubrication) | 500〜4500 r/min |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (NNCL Type Double-Row Full Complement Cylindrical Roller Bearing).
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1. Bore and housing bore dimensions
This product: Inner diameter d 60〜400 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 78.1〜5500 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
This product: Limiting speed (grease lubrication) 500〜4500 r/minThe 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
The NNCL type is a double-row full complement roller bearing with no center flange on the outer ring, allowing axial displacement. Its dimension series is common with the NNCF type.
Features
- Design that allows axial displacement
- Outer diameter and width dimensions common with NNCF type
Applications
- Machine tools
- Industrial machinery
- Speed reducers
FAQ
- Q. What are the bore and outer diameter ranges of the NNCL type?
- A. The bore diameter d is 60 to 400 mm, and the outer diameter D is 85 to 600 mm.
- Q. Can the NNCL type be used for axial positioning?
- A. It is a double-row full complement cylindrical roller bearing with no center flange on the outer ring, allowing axial displacement. The overview states that it is used for axial positioning applications.
- Q. Is the NNCL type dimensionally interchangeable with the NNCF type?
- A. The NNCL type shares its dimension series with the NNCF type, with common outer diameter and width dimensions.
- Q. What are the width and basic dynamic load rating ranges of the NNCL type?
- A. The width B is 25 to 272 mm, and the basic dynamic load rating Cr is 78.1 to 5500 kN.
- Q. What is the limiting speed of the NNCL type under grease lubrication?
- A. The limiting speed under grease lubrication is 500 to 4500 r/min.
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 Found on: https://azuma-eg.com/catalogue/
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