SKF High-Temperature Deep Groove Ball Bearing VA201
VA201 / SKF (Official website) / Listed on page 15 of the document
High-temperature deep groove ball bearing lubricated with polyalkylene glycol and graphite-blended grease, rated up to 250 °C. Available in open and double-sided shielded designs.
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Specifications
| Maximum Operating Temperature | 250 °C |
|---|---|
| Permissible rotational speed | 4500/d (d = mean bearing diameter) r/min |
| Break-In Operation | Required |
VA201 model comparison
Compare 2 models in the same series by specification.
| Model | Maximum Operating Temperature | Break-In Operation |
|---|---|---|
| SKF高温用インサート軸受・玉軸受ユニット VA201 | 250 °C | Required |
| SKF高温用深溝玉軸受 VA201 This product | 250 °C | Required |
How to choose Deep Groove Ball Bearings
Points to check when selecting, with the values for this product (SKF High-Temperature Deep Groove Ball Bearing VA201).
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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
The open design (no shields) can be re-greased and requires periodic lubricant inspection. The 2Z version is lubricated for the life of the bearing. Running-in is required for low-temperature applications.
Features
- Maximum operating temperature 250 °C
- Available in open and 2Z double-sided shielded designs
- Running-in required
Applications
- Medium-temperature rotating machinery
- High-temperature environments up to 250 °C
FAQ
- Q. What is the maximum operating temperature of SKF VA201?
- A. The maximum operating temperature is 250 °C.
- Q. Can I choose between open and sealed types for SKF VA201?
- A. Yes, open and 2Z double-sided shielded designs are available. The open design (no shields) can be re-greased and requires periodic lubricant inspection. The 2Z version is lubricated for the life of the bearing.
- Q. How is the permissible rotational speed of SKF VA201 determined?
- A. The permissible speed is 4500/d r/min, where d is the bearing mean diameter.
- Q. Is there anything to note when using SKF VA201 at low temperatures?
- A. Running-in is required for low-temperature applications.
Written by AI based on the content of the source documents.
Source documents
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Catalog
SKF高温用軸受 最高運転温度350 °C(660 °F)
40 pages Open page 15
Found on: https://azuma-eg.com/catalogue/
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