7217 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7217 CD/HCP4A Bearing Product Overview & Core Advantages
The 7217 CD/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to a P4 (ABEC-7) tolerance class, this bearing is optimized to handle combined loads with high reliability. Its ceramic ball construction and phenolic cage contribute to superior high-speed capabilities and reduced weight. The bearing is pre-lubricated and comes with a preload, ensuring immediate operational readiness, high system rigidity, and precise rotational accuracy.
7217 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7217 | Basic bearing series, indicating a metric bore diameter of 85 mm, outside diameter of 150 mm, and width of 28 mm. |
| C | Designates a 15° contact angle, optimized for high-speed operation and handling combined radial and axial loads. |
| D | Indicates a high-capacity internal design, featuring a larger ball complement (17 balls) and increased ball diameter (19.05 mm) for enhanced load ratings. |
| HC | Refers to the use of Hybrid Ceramic balls (Silicon Nitride), which reduce friction, weight, and heat generation, enabling higher limiting speeds. |
| P4 | Specifies the precision tolerance class (equivalent to ABEC-7), ensuring extremely tight dimensional and running accuracy for high-precision machinery. |
| A | Denotes that the bearing is supplied with a preload, which increases system rigidity and minimizes axial and radial runout. |
7217 CD/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 15° contact angle and preload provides exceptional stiffness, effectively resisting deflection under combined loads. The high-capacity (D) internal geometry, featuring 17 large-diameter ceramic balls, significantly boosts both the dynamic and static load ratings.
Superior High-Speed Performance: The combination of ceramic balls and a lightweight phenolic resin cage minimizes centrifugal forces and friction, allowing the bearing to achieve a high limiting speed of 17,000 rpm. This makes it an ideal high-speed bearing for precision spindles.
Precision and Longevity: Manufactured to P4 tolerance, this bearing guarantees minimal vibration and precise running accuracy. The open seal type facilitates optimal lubrication management, while the hybrid ceramic construction offers excellent resistance to wear and a wide operating temperature range.
7217 CD/HCP4A Bearing Typical Application Areas
The 7217 CD/HCP4A is engineered for high-performance applications where precision, speed, and reliability are critical. Its primary uses include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Instrumentation: High-speed measuring devices and analytical equipment.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and auxiliary power units (APUs).
- High-Frequency Motors and Turbomachinery: Where low friction and high rotational accuracy are required.
