Combination Ceramic Bearing
組合せセラミック軸受 / JTEKT Corporation (Official website) / Listed on page 61 of the document
Combination ceramic bearing achieving reduced torque through high-precision ceramic balls and optimized internal design. Suitable for applications such as skateboards.
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Specifications
| Permissible rotational speed | 10000 min-1 |
|---|---|
| Lubrication Method | Oil or grease |
| Operating Atmosphere (Pressure) | Atmospheric pressure |
| Operating Temperature Range | -30～120 ℃ |
| Rolling element material | 窒化けい素(Si3N4) |
| Vickers hardness | 1500 HV |
| Modulus of elasticity | 320 GPa |
| Density | 3.2 g/cm3 |
| Maximum Operating Temperature | 800 ℃ |
| Thermal Conductivity | 20 W/(m・K) |
| Basic static load rating C0r | 0.85 times the basic static load rating of general bearings |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (Combination Ceramic 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
This product: Basic static load rating C0r 0.85 times the basic static load rating of general bearingsThe 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 -30～120 ℃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
Achieves reduced bearing torque through the use of high-precision ceramic balls and optimized internal design. Features low torque and improved durability, with a permissible rotational speed of 10000 min-1, used with oil or grease lubrication.
Features
- Low torque
- Improved durability
Applications
- Skateboards
FAQ
- Q. What applications is the combination ceramic bearing suitable for?
- A. It is suitable for applications such as skateboards.
- Q. How is the reduced torque of the combination ceramic bearing achieved?
- A. Reduced torque is achieved through the use of high-precision ceramic balls and optimized internal design.
- Q. What are the rolling element material, permissible rotational speed, and lubrication method of the combination ceramic bearing?
- A. The rolling element material is silicon nitride (Si3N4). The permissible rotational speed is 10000 min-1, and it is used with oil or grease lubrication.
- Q. What are the operating temperature range and operating atmosphere of the combination ceramic bearing?
- A. The operating temperature range is -30 to 120 ℃, and the operating atmosphere (pressure) is atmospheric pressure. The maximum operating temperature is 800 ℃.
- Q. How does the basic static load rating C0r of the combination ceramic bearing compare with that of general bearings?
- A. It is 0.85 times the basic static load rating of general bearings.
Written by AI based on the content of the source documents.
Source documents
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