7017 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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7017 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7017 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is distinguished by its 25° contact angle and is supplied with a preload, ensuring high system rigidity and minimal axial and radial runout. Its construction with ceramic balls and a phenolic cage enables superior high-speed performance and reduced rotational inertia. Operating effectively within a temperature range of -30°C to 110°C, this bearing is designed to handle combined loads, with a high capacity for thrust loads in one direction.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing series, indicating a metric bore diameter of 85 mm, outside diameter of 130 mm, and width of 22 mm. |
| AC | Angular Contact design with a 25° contact angle. |
| D | The bearing is supplied with a preload for high rigidity and precise rotational accuracy. |
| HC | Indicates the use of Hybrid Ceramic components (ceramic balls with steel rings). |
| P4 | Specifies the tolerance class P4 (ABEC-7), denoting very high precision levels. |
7017 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The application of a factory-set preload eliminates internal clearance, resulting in a stiffer bearing system that is critical for applications requiring high positional accuracy and minimal deflection under load.
- Superior High-Speed Capability: The combination of ceramic balls (lighter and harder than steel) and a lightweight phenolic resin cage significantly reduces centrifugal forces and friction, allowing for a high limiting speed of 17,000 rpm. This also reduces operating temperature and extends service life.
- Enhanced Durability and Long Life: Hybrid ceramic construction offers excellent resistance to wear and is less susceptible to electrical arcing damage. The phenolic cage provides good dimensional stability and operates smoothly at high speeds.
- High Load Capacity: The 25° contact angle is optimized to support significant combined loads, offering a high thrust load capacity alongside its radial load rating (C = 14,332 lbf, C0 = 13,950 lbf).
7017 ACD/HCP4A Bearing Typical Application Areas
This high-performance bearing is ideally suited for advanced machinery where precision, high speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- High-Frequency Motors and Spindles: Motors for PCB drilling, dental handpieces, and small precision spindles.
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and auxiliary power units (APUs).
- Precision Instrumentation: High-speed centrifuges, optical scanners, and coordinate measuring machines.
