71817 CD/HCP4
Hybrid Ceramic Super Precision Bearings
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71817 CD/HCP4 Bearing Product Overview & Core Advantages
The 71817 CD/HCP4 is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and rigidity. As a single bearing with a 15° contact angle, it is optimized to support combined loads, handling significant radial loads and axial loads in one direction simultaneously. Its P4 (ABEC-7) tolerance class ensures ultra-precise running accuracy, making it ideal for high-speed spindles and other precision machinery. The combination of a phenolic cage and ceramic balls contributes to superior high-speed performance, low friction, and extended service life.
71817 CD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 71817 | Basic bearing designation, defining the standard metric dimensions: 85mm bore, 110mm outside diameter, 13mm width. |
| CD | Indicates a high rigidity design and that the bearing is supplied with a specific preload for optimal operational stiffness and rotational accuracy. |
| HC | Signifies the use of Hybrid Ceramic components, specifically ceramic balls, which reduce weight, lower friction, and allow for higher limiting speeds. |
| P4 | Denotes the tolerance class, equivalent to ABEC-7. This guarantees extremely tight dimensional and running accuracy for high-precision applications. |
71817 CD/HCP4 Bearing Structural Features & Performance Benefits
High Rigidity and Preload: The CD designation confirms the bearing is manufactured with a defined preload. This eliminates internal clearance, resulting in significantly increased rigidity, precise shaft positioning, and reduced vibration and noise under load.
Superior High-Speed Performance: The hybrid ceramic design (HC) is a key performance driver. Ceramic balls are lighter and harder than steel, reducing centrifugal forces and wear. Combined with the lightweight, self-lubricating phenolic cage, this configuration enables a high limiting speed of 20,000 rpm and stable operation at high velocities.
Enhanced Load Capacity: The 15° contact angle is optimized to support combined loads effectively. With a dynamic load rating of 4860 lbf and a static load rating of 5738 lbf, it offers reliable performance in demanding conditions.
Precision Engineering: Manufactured to P4 tolerance standards, this bearing ensures minimal runout and consistent performance, which is critical for applications requiring high rotational accuracy.
71817 CD/HCP4 Bearing Typical Application Areas
The 71817 CD/HCP4 is designed for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Where low inertia and high-speed capability are required.
- Medical and Dental Equipment: High-speed handpieces and scanners.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
