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High-Temperature Deep Groove Ball Bearings

VA201 / 2Z/VA201 / 2Z/VA208 / 2Z/VA228 / SKF (Official website) / Listed on page 16 of the document

A series of deep groove ball bearings for use in high-temperature environments. Offers a wide range of sizes with bore diameters of 12 to 120 mm, with shielded and open type variations.

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High-Temperature Deep Groove Ball Bearings on page 16 of SKF "SKF高温用軸受 最高運転温度350 °C(660 °F)"
Source: SKF「SKF高温用軸受 最高運転温度350 °C(660 °F)」page 16
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Specifications

Inner diameter d 12~120 mm
Outer diameter D 32~214 mm
Operating Temperature Range 250~350 °C
Dimensional Stabilization Treatment Temperature 120~150 °C

How to choose Deep Groove Ball Bearings

Points to check when selecting, with the values for this product (High-Temperature Deep Groove Ball Bearings).

  1. 1. Main dimensions to suit shaft and housing

    This product: Inner diameter d 12~120 mm

    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

    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

High-temperature bearings sealed with graphite-based lubricant and delivered without anti-rust oil. Available in shielded type (2Z) and open type (VA201), with limiting temperature classes of 250 °C and 350 °C. Heating is recommended for mounting, and measures against fit and thermal expansion are also required.

Features

  • Limiting temperature of 250 °C or 350 °C
  • Choice of double-shielded (2Z) or open type (VA201)
  • Sealed with graphite-based lubricant
  • Delivered without anti-rust oil

Applications

  • Machinery and equipment in high-temperature environments
  • Applications requiring dry environments

FAQ

Q. To what temperature can the high-temperature deep groove ball bearings VA201 / 2Z / VA208 / 2Z / VA228 be used?
A. Limiting temperature classes of 250 °C or 350 °C are available. The operating temperature range is 250 to 350 °C.
Q. What is the difference between the shielded type (2Z) and the open type of the high-temperature deep groove ball bearing VA201 / 2Z?
A. The shielded type (2Z) is double-shielded, and the open type is VA201. You can select either one.
Q. What are the bore and outside diameter ranges of the high-temperature deep groove ball bearings VA201 / 2Z / VA208 / 2Z / VA228?
A. The bore diameter d ranges from 12 to 120 mm, and the outside diameter D ranges from 32 to 214 mm.
Q. What lubricant is sealed in the high-temperature deep groove ball bearings VA201 / 2Z / VA208 / 2Z / VA228, and is anti-rust oil included?
A. They are sealed with graphite-based lubricant and delivered without anti-rust oil.
Q. Are there any precautions when mounting the high-temperature deep groove ball bearings VA201 / 2Z / VA208 / 2Z / VA228?
A. Heating is recommended for mounting. Measures against fit and thermal expansion are also necessary. The dimensional stabilization treatment temperature is 120 to 150 °C.

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

Source documents

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