All-Ceramic Ball Bearing
JTEKT Corporation (Official website) / Listed on page 7 of the document
All-ceramic structure bearing usable up to 800 ℃ for ultra-high-temperature applications. Also supports corrosion resistance, non-magnetic properties, and electrical insulation.
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Specifications
| Atmospheric pressure | Atmospheric pressure to 10-10 Pa |
|---|---|
| Operating Temperature Range | -200～800 ℃ |
| Permissible rotational speed | dmn value < 7200, max. 500 min-1 |
| Permissible radial load | Approx. 1% or less of basic dynamic load rating |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (All-Ceramic Ball Bearing).
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1. Bore and housing bore dimensions
Select 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
The 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
The 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
This product: Operating Temperature Range -200～800 ℃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 all-ceramic structure enables use not only in high-temperature environments but also in corrosive, non-magnetic, insulating, and vacuum environments.
Features
- All-ceramic structure
- 800 ℃ capable
Applications
- Transfer equipment in firing furnaces
- Furnace fans
FAQ
- Q. In what temperature and atmosphere conditions can the all-ceramic ball bearing be used?
- A. The operating temperature range is -200 to 800 ℃. It supports atmospheric pressure to 10-10 Pa.
- Q. What are the permissible rotational speed and permissible radial load of the all-ceramic ball bearing?
- A. The permissible rotational speed is dmn value < 7200, maximum 500 min-1. The permissible radial load is approximately 1% or less of the basic dynamic load rating.
- Q. What applications is the all-ceramic ball bearing suited for?
- A. It is used in transfer equipment in firing furnaces and furnace fans. The all-ceramic structure enables use not only in high-temperature environments but also in corrosive, non-magnetic, insulating, and vacuum environments.
Written by AI based on the content of the source documents.
Source documents
- Catalog 特殊環境用 EXSEV 商品ガイド Open page 7
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