PRECILENCE Angular Contact Ball Bearings
PC7900C・PC7000C・PM7000C 系列 / JTEKT Corporation (Official website) / Listed on page 106 of the document
Ultra-high precision, ultra-high speed angular contact ball bearing series. Available in high-speed high-load type and high-speed high-rigidity type, with precision grades P4S and P2.
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Specifications
| Contact Angle α | 15°・20° |
|---|---|
| Accuracy grade | P4S・P2 |
| Cage Material | PEEK resin, outer ring guided type |
| Rolling element material | Ceramic balls |
| Inner diameter d | 90〜100 mm |
| Outer diameter D | 140〜150 mm |
| Width B | 24 mm |
| Basic dynamic load rating (PC7018C) | 78.7 kN |
| Basic static load rating (PC7018C) | 50.2 kN |
| Permissible speed (grease, PC7018C) | 19000 min-1 |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (PRECILENCE Angular Contact Ball Bearings).
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1. Bore and housing bore dimensions
This product: Inner diameter d 90〜100 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
This product: Accuracy grade 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
Standard contact angles are 15° and 20°. Rolling elements are ceramic balls, and the cage is an outer-ring guided type made of PEEK resin. Steel ball and phenolic resin or polyamide resin cages are also available depending on the application. Manufactured to the company's proprietary specifications.
Features
- Ultra-high precision series
- High-speed high-load type and high-speed high-rigidity type
- Ceramic balls as standard
- PEEK resin cage as standard
Applications
- Machine tool spindles
- Ultra-high precision rotating parts
FAQ
- Q. What are the standard contact angles and precision grades for the PRECILENCE Angular Contact Ball Bearings PC7900C, PC7000C, and PM7000C series?
- A. Standard contact angles are 15° and 20°. Precision grades are P4S and P2.
- Q. What are the materials of the rolling elements and cages for PRECILENCE Angular Contact Ball Bearings?
- A. Ceramic balls are standard for rolling elements. The standard cage is an outer-ring guided type made of PEEK resin, and steel ball and phenolic resin or polyamide resin cages are also available depending on the application.
- Q. What applications are PRECILENCE Angular Contact Ball Bearings suited for?
- A. They are suited for machine tool spindles and ultra-high precision rotating parts. This is an ultra-high precision, ultra-high speed series available in high-speed high-load type and high-speed high-rigidity type.
- Q. What are the basic dynamic load rating, basic static load rating, and allowable rotational speed of the PC7018C?
- A. The basic dynamic load rating is 78.7 kN, the basic static load rating is 50.2 kN, and the allowable rotational speed with grease lubrication is 19000 min-1.
- Q. What are the dimension ranges for the bore diameter, outside diameter, and width of PRECILENCE Angular Contact Ball Bearings?
- A. Bore diameter d is 90 to 100 mm, outside diameter D is 140 to 150 mm, and width B is 24 mm.
Written by AI based on the content of the source documents.
Source documents
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