7017 ACD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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7017 ACD/HCP4ADBA Bearing Product Overview & Core Advantages
The 7017 ACD/HCP4ADBA is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This matched back-to-back (DB) arrangement is preloaded to Extra Light / Class A specifications, delivering superior running accuracy and system stability. Its key advantage lies in its ability to handle combined loads—significant radial and bidirectional axial loads simultaneously. Featuring a 25° contact angle and constructed with high-performance materials, this bearing is engineered for high-speed operation and long-term reliability in precision machinery.
7017 ACD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing series and size designation (85mm bore, 130mm OD). |
| AC | Angular Contact ball bearing. |
| D | Duplex Back-to-Back (DB) matched arrangement. |
| HC | Hybrid Ceramic: Ceramic balls with steel rings. |
| P4A | High-Precision Tolerance Class (equivalent to ABEC 7). |
| DB | Duplex Back-to-Back mounting (reiterated for clarity in the full code). |
| A | Specifies the Extra Light preload class. |
7017 ACD/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & System Stability: The duplex back-to-back (DB) design creates a rigid, moment-resisting bearing system, essential for applications requiring minimal shaft deflection and high positional accuracy.
Superior Load Capacity: The 25° contact angle is optimized to handle substantial combined radial and axial loads from both directions, making it ideal for complex loading conditions.
Enhanced High-Speed Performance: The combination of a lightweight phenolic cage and low-friction ceramic balls (Hybrid HC) reduces centrifugal forces and operating temperatures, enabling a high limiting speed of 28,000 rpm.
Reduced Wear & Long Service Life: Ceramic balls are harder, lighter, and more electrically resistant than steel, leading to reduced wear, extended lubrication life, and protection against electrical erosion.
Precision Operation: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for the accuracy of high-speed spindles and precision equipment.
7017 ACD/HCP4ADBA Bearing Typical Application Areas
This high-performance duplex angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Where high rotational accuracy and speed are paramount.
- Turbochargers and other high-speed rotational machinery.
