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SKF Ultra High/Low Temperature Deep Groove Ball Bearing

超高低温用深溝玉軸受 / SKF (Official website) / Listed on page 24 of the document

Deep groove ball bearing for extreme high and low temperature environments. Variants VA201, VA208 and VA228 are available, differing in cage and seal types.

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SKF Ultra High/Low Temperature Deep Groove Ball Bearing on page 24 of SKF "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"
Source: SKF「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」page 24
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Specifications

Operating Temperature Range -30~+250 °C
Limiting speed (grease lubrication) 9000 r/min

How to choose Deep Groove Ball Bearings

Points to check when selecting, with the values for this product (SKF Ultra High/Low Temperature Deep Groove Ball Bearing).

  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 6. Check speed limits and electrical corrosion countermeasures

    This product: Limiting speed (grease lubrication) 9000 r/min

    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.

About Deep Groove Ball Bearings and all products

Description

Same dimensions as standard single-row deep groove ball bearings, capable of carrying axial loads in addition to radial loads. VA201 uses a steel plate cage and is filled with lubricant; VA208 and VA228 use graphite cages and dry lubrication.

Features

  • Manganese phosphate treatment improves corrosion resistance
  • Radial internal clearance is a multiple of C5
  • Double shielded as standard (2Z)

Applications

  • High-temperature furnace peripheral equipment
  • Machinery for cryogenic environments
  • Railways and rolling stock

FAQ

Q. What are the differences between VA201, VA208 and VA228 of the SKF Ultra High/Low Temperature Deep Groove Ball Bearing?
A. VA201 uses a steel plate cage and is filled with lubricant. VA208 and VA228 use graphite cages and dry lubrication.
Q. In what environments and load conditions can the SKF Ultra High/Low Temperature Deep Groove Ball Bearing be used?
A. It is suited to extreme high and low temperature environments. The operating temperature range is -30 to +250 °C. It has the same dimensions as standard single-row deep groove ball bearings and can carry axial loads in addition to radial loads.
Q. What can you tell me about the corrosion resistance and seals of the SKF Ultra High/Low Temperature Deep Groove Ball Bearing?
A. Manganese phosphate treatment improves corrosion resistance. Double shielding (2Z) is standard.
Q. What are the limiting speed and internal clearance of the SKF Ultra High/Low Temperature Deep Groove Ball Bearing?
A. The limiting speed with grease lubrication is 9000 r/min. The radial internal clearance is a multiple of C5.
Q. What applications is the SKF Ultra High/Low Temperature Deep Groove Ball Bearing suited for?
A. It is used in high-temperature furnace peripheral equipment, machinery for cryogenic environments, railways and rolling stock, among other applications.

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

Source documents

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