Hybrid Deep Groove Ball Bearing
SKFハイブリッド軸受 (基本設計/シール付き/XL型) / SKF (Official website) / Listed on page 89 of the document
Deep groove ball bearing combining bearing steel rings with silicon nitride rolling elements. Features electrical insulation, high-speed capability and long service life.
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Specifications
| Rolling element material | Silicon nitride (Si3N4) |
|---|---|
| Rolling element specific gravity (relative to steel) | 60 % |
How to choose Deep Groove Ball Bearings
Points to check when selecting, with the values for this product (Hybrid Deep Groove Ball Bearing).
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1. Main dimensions to suit shaft and housing
Select the bore diameter d to match the shaft diameter, the outside diameter D to match the housing bore, and the width B to suit the installation space. The listed products cover a wide range of bore diameters from 0.6 to 1420 mm, and even at the same bore diameter there are dimension series with different outside diameters and widths. Since load capacity and mass change with the dimension series, confirm the three dimensions in combination.
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2. Basic dynamic load rating for life calculation
The basic dynamic load rating Cr is the reference value for calculating rolling fatigue life, and life is estimated from the ratio of the actual applied load to Cr. For high loads or when long life is required, select a bearing with a larger Cr. Bearings made of special materials may have lower ratings than steel bearings of the same dimensions, so confirm life under the operating conditions.
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3. Check static and shock loads against static rating
The basic static load rating C0r is the guideline load at which permanent deformation does not occur, applicable when stationary, rotating at low speed, or subjected to shock loads. For applications with oscillating motion or large loads while stopped, select with emphasis on the ratio to C0r (static safety factor) rather than the dynamic rating.
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4. Internal clearance to suit fit and temperature
Radial internal clearance decreases during operation due to interference fits and temperature differences between the inner and outer rings. Clearances larger than standard, such as C3, are used in applications where the inner ring tends to expand, such as motors or high-temperature environments. Clearance that is too small leads to heat generation and seizure, so determine the class from the fit and operating temperature.
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5. Materials and lubrication suited to the environment
Stainless steel or ceramics (silicon nitride, zirconia, silicon carbide) are used in water or chemical solutions, while solid lubricants such as graphite or fluorine-based solids and fluorine grease are used in high-temperature, vacuum or clean environments. Listed products have maximum operating temperatures of 250 to 350°C, so select the material and lubrication method based on temperature, atmosphere and dust-generation requirements.
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6. Check speed limits and electrical corrosion countermeasures
Confirm that the limiting speed and reference speed exceed the operating speed. In equipment where shaft current flows, such as inverter-driven motors, hybrid bearings with insulating-coated or ceramic balls can prevent electrolytic corrosion. Ceramic balls are lighter than steel balls, so the effect of centrifugal force is reduced even at high speeds.
This guide was written by AI based on the listed products' documents and specification items.
Description
Features bearing steel rings and silicon nitride (Si3N4) rolling elements. Silicon nitride is an excellent electrical insulator, and its specific gravity is approximately 60% of that of steel, making it lightweight. Low friction makes it suitable for high-speed operation and long service life, and it is resistant to false brinelling and smearing. Product range includes basic design, sealed, and XL type.
Features
- Electrical insulation from silicon nitride rolling elements
- Rolling element specific gravity is 60% of steel
- Low friction and low temperature rise
- Suitable for high-speed rotation
- Resistance to false brinelling
- Reduced smearing
Applications
- Electric motors
- Generators
FAQ
- Q. What material is used for the rolling elements of the SKF Hybrid Deep Groove Ball Bearing?
- A. The rings are made of bearing steel, and the rolling elements are made of silicon nitride (Si3N4). Silicon nitride is an excellent electrical insulator.
- Q. What features does the SKF Hybrid Deep Groove Ball Bearing offer for electric motors and generators?
- A. It offers electrical insulation from silicon nitride rolling elements, suitability for high-speed rotation, low friction and low temperature rise, resistance to false brinelling, and reduced smearing. The specific gravity of the rolling elements is 60% of steel. Applications indicated are electric motors and generators.
- Q. What product range is available for the SKF Hybrid Deep Groove Ball Bearing?
- A. Basic design, sealed, and XL type product ranges are available.
Written by AI based on the content of the source documents.
Source documents
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Catalog
SKF 転がり軸受カタログ 15 エンジニアリング製品 15A センサー軸受ユニット
120 pages Open page 89
Found on: https://azuma-eg.com/catalogue/
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