Highability Angular Contact Ball Bearing HAR900C/HAR900CA/HAR900
HAR900・HAR000・HAC000・HAC900・HAD000 / JTEKT Corporation (Official website) / Listed on page 92 of the document
Angular contact ball bearing series for high-speed rotation in machine tool spindles. Ceramic balls and outer-ring-guided cages are standard, with high-rigidity, high-load, and ultra-high-speed types available.
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Specifications
| Contact Angle α | 15°・20°・25°・30° |
|---|---|
| Cage Material | Reinforced phenolic resin, outer ring guided type |
| Rolling element material | Ceramic balls |
| Preload Code | Light preload S, light-medium preload L, medium preload M, heavy preload H |
| Accuracy grade | P5・P4・P4S・P2 |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (Highability Angular Contact Ball Bearing HAR900C/HAR900CA/HAR900).
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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
This product: Accuracy grade P5・P4・P4S・P2Precision 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
The contact angle is 20° as standard, with 15° and 30° available for the high-rigidity type and 15° available for the high-load type. Rolling elements are ceramic balls, and the cage is made of reinforced phenolic resin. Steel balls and ball-guided cages can also be selected depending on the application. The HAR000 series is also available with non-contact seals.
Features
- Ceramic balls as standard
- Contact angles selectable from 15°, 20°, 25°, and 30°
- Three types: high-rigidity, high-load, and ultra-high-speed
- Compatible with steel balls and ball-guided cages
Applications
- Machine tool spindles
FAQ
- Q. From which contact angles can I choose for the HAR900C/HAR900CA/HAR900?
- A. The contact angle is 20° as standard, with 15° and 30° available for the high-rigidity type and 15° available for the high-load type. The specifications state that the contact angle α can be selected from 15°, 20°, 25°, and 30°.
- Q. What are the materials of the rolling elements and cage for the HAR900C/HAR900CA/HAR900?
- A. Ceramic balls are standard for the rolling elements. The cage is made of reinforced phenolic resin and is outer-ring guided. Steel balls and ball-guided cages can also be selected depending on the application.
- Q. What applications and types are available for the HAR900C/HAR900CA/HAR900?
- A. It is intended for machine tool spindles and supports high-speed rotation. Three types are available: high-rigidity, high-load, and ultra-high-speed.
- Q. Does the HAR000 series support non-contact seals?
- A. Yes, the HAR000 series is also available with non-contact seals.
- Q. What are the preload and precision class symbols for the HAR900C/HAR900CA/HAR900?
- A. Preload symbols are S for extra-light preload, L for light preload, M for medium preload, and H for heavy preload. Precision class symbols are P5, P4, P4S, and P2.
Written by AI based on the content of the source documents.
Source documents
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