7217 CD/P4AQFCB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 7217 CD/P4AQFCB is a precision quadruplex matched bearing set designed for applications requiring exceptional rigidity and accuracy. This angular contact ball bearing configuration features a face-to-face (QFC) arrangement with a Light preload (Class B), delivering superior stability and minimal runout under complex loading conditions. Its P4A tolerance class ensures high rotational accuracy, making it ideal for high-speed spindles and precision machinery where combined loads must be managed with extreme precision.
7217 CD/P4AQFCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7217 | Basic bearing designation: 85 mm bore, 150 mm OD, 28 mm single width |
| CD | Contact angle of 15° |
| P4A | High precision tolerance class with enhanced dimensional and running accuracy |
| QFC | Quadruplex Face-to-Face arrangement - four bearings matched in face-to-face configuration |
| B | Light preload classification for optimal stiffness and thermal performance |
Structural Features and Performance Benefits
Exceptional Rigidity: The quadruplex face-to-face arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads while maintaining precise shaft positioning. This configuration provides superior resistance to moment loads and deflection.
High-Speed Capability: Featuring a phenolic cage material and optimized internal geometry, this bearing set achieves a limiting speed of 17,000 rpm. The 15° contact angle balances axial and radial load capacity while maintaining excellent high-speed performance.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore tolerance: -0.004mm to 0), this bearing ensures minimal vibration and precise rotational accuracy for demanding applications.
Optimized Load Distribution: With 17 precision balls per bearing and a ball diameter of 19.05 mm, the set provides excellent load distribution and high dynamic load capacity (59,625 lbf dynamic / 79,875 lbf static).
7217 CD/P4AQFCB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling machine spindles requiring extreme rigidity and accuracy
- High-Speed Machining Centers: Applications demanding both high rotational speeds and precise positioning capabilities
- Precision Gearboxes: Industrial transmission systems where minimal deflection and high load capacity are critical
- Aerospace Components: Flight control systems and auxiliary power units requiring reliable performance under complex loading conditions
- Medical Equipment: High-speed dental handpieces and surgical tool drives where precision and reliability are paramount
