EXSEV Full-Complement Ceramic Bearing (Ultra-High Temperature Type)
NCV（NC7xxxV 等） / JTEKT Corporation (Official website) / Listed on page 31 of the document
A radial ball bearing with all components made of ceramics, suitable for ultra-high temperature environments of 800 ℃, as well as vacuum and clean environments.
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Specifications
| Maximum Operating Temperature | 800 ℃ |
|---|---|
| Inner diameter d | 4～40 mm |
| Outer diameter D | 12～80 mm |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (EXSEV Full-Complement Ceramic Bearing (Ultra-High Temperature Type)).
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1. Bore and housing bore dimensions
This product: Inner diameter d 4～40 mmSelect 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
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
A full-complement ball bearing structure without a cage, using silicon nitride ceramics for the outer ring, inner ring, and balls. Intended for applications such as conveyance equipment inside firing furnaces and furnace fans.
Features
- Ultra-high temperature resistance up to 800 ℃
- Full-complement ball structure without cage
- All components made of ceramics
Applications
- Conveyance equipment inside firing furnaces
- Furnace fans
FAQ
- Q. In what high-temperature environments can the EXSEV Full-Complement Ceramic Bearing (NCV Series) be used?
- A. The maximum operating temperature is 800 ℃. The product is suitable for ultra-high temperature environments of 800 ℃, as well as vacuum and clean environments.
- Q. What is the structure and material of the EXSEV Full-Complement Ceramic Bearing (NCV Series)?
- A. It has a full-complement ball structure without a cage. Silicon nitride ceramics are used for the outer ring, inner ring, and balls, and all components are made of ceramics.
- Q. What applications is the EXSEV Full-Complement Ceramic Bearing (NCV Series) suited for?
- A. It is intended for applications such as conveyance equipment inside firing furnaces and furnace fans.
- Q. What is the dimensional range of the EXSEV Full-Complement Ceramic Bearing (NCV Series)?
- A. The inner diameter d is 4 to 40 mm, and the outer diameter D is 12 to 80 mm.
Written by AI based on the content of the source documents.
Source documents
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