Bearings for Space Equipment
JTEKT Corporation (Official website) / Listed on page 4 of the document
Bearings usable in space under high vacuum, a wide temperature range, and radiation environments. Combines materials technology and tribology technology.
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How to choose Rolling Bearings
Points to check when selecting, with the values for this product (Bearings for Space Equipment).
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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
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
Uses high corrosion-resistant steel, special vacuum grease, and solid lubricants, and supports long-term storage on the ground as well as use in high vacuum and high-speed environments.
Features
- High corrosion-resistant steel
- Special vacuum grease
- Solid lubricant
Applications
- Artificial satellites
- Space equipment
- Rockets
FAQ
- Q. What materials and lubrication technologies are used in bearings for space equipment?
- A. They use high corrosion-resistant steel, special vacuum grease, and solid lubricants.
- Q. In what environments can bearings for space equipment be used?
- A. They are bearings usable in space under high vacuum, a wide temperature range, and radiation environments. They also support long-term storage on the ground and use in high vacuum and high-speed environments.
- Q. What are the main applications of bearings for space equipment?
- A. They are used in artificial satellites, space equipment, and rockets.
Written by AI based on the content of the source documents.
Source documents
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