71803 ACD/HCP4
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71803 ACD/HCP4 Bearing Product Overview & Core Advantages
The 71803 ACD/HCP4 is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. This single-row bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, with a 25° contact angle for optimal force distribution. Its standout features include a ceramic ball and phenolic cage construction, enabling superior high-speed capabilities and reduced rotational mass. Manufactured to P4 (ABEC-7) tolerance class, it offers extremely tight dimensional control for applications requiring minimal runout and vibration.
71803 ACD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71803 | Basic bearing series and size designation (17mm bore, 26mm OD, 5mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | High Preload level for maximum rigidity and precise rotational accuracy. |
| HC | Hybrid Ceramic construction, featuring ceramic balls for high-speed and long-life performance. |
| P4 | Precision tolerance class (equivalent to ABEC-7), ensuring ultra-precise running accuracy. |
71803 ACD/HCP4 Bearing Structural Features & Performance Benefits
- High Rigidity & Preload: The bearing is supplied with a high preload (D), which eliminates internal clearance. This results in significantly increased system rigidity, reduced vibration, and superior positional accuracy under load, making it ideal for machine tool spindles.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 90,000 rpm. This design also reduces heat generation at high velocities.
- Extended Service Life & Reliability: Hybrid ceramic construction offers excellent wear resistance and is less susceptible to lubrication failure. The phenolic cage provides good dimensional stability and operates smoothly with minimal friction.
- Precision Engineering: Manufactured to P4 tolerance, this bearing guarantees minimal runout and consistent performance, which is critical for applications like high-speed machining and precision instrumentation.
71803 ACD/HCP4 Bearing Typical Application Areas
The 71803 ACD/HCP4 is specifically designed for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotics and Automation
- Dental and Medical Handpieces
- Aerospace Instrumentation and Gyroscopes
- Semiconductor Manufacturing Equipment
