71801 ACD/HCP4
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
71801 ACD/HCP4 Bearing Product Overview & Core Advantages
The 71801 ACD/HCP4 is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing features a 25° contact angle and is supplied with a preload, delivering superior running accuracy and high rigidity. Its compact design, with a 12 mm bore and 5 mm width, makes it ideal for space-constrained, high-speed applications. The combination of a ceramic ball material and P4 (ABEC-7) tolerance class ensures low friction, minimal heat generation, and extended service life under high-speed conditions up to 110,000 rpm.
71801 ACD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71801 | Basic bearing series and size designation (12mm bore, 21mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high-precision design. |
| HC | Indicates the use of Hybrid Ceramic balls (Ceramic balls with steel rings). |
| P4 | Specifies the P4 (ABEC-7) tolerance class for ultra-precision applications. |
71801 ACD/HCP4 Bearing Structural Features & Performance Benefits
High-Speed & Low Friction Performance: The use of ceramic (Si3N4) balls significantly reduces centrifugal forces and sliding friction, enabling the bearing to achieve its high limiting speed of 110,000 rpm. This hybrid construction also provides superior resistance to wear and a longer operational life.
High Rigidity & Running Accuracy: The 25° contact angle and factory-applied preload eliminate internal clearance, resulting in exceptional stiffness and precise shaft positioning. This is critical for applications demanding minimal runout and vibration.
Optimized Cage Design: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to smooth operation at high speeds and reduced cage wear.
Precision Engineering: Manufactured to P4 tolerance class, this bearing guarantees tight dimensional and running accuracy, making it suitable for the most demanding precision machinery.
71801 ACD/HCP4 Bearing Typical Application Areas
The 71801 ACD/HCP4 is ideally suited for high-performance applications where speed, precision, and reliability are paramount. Key industries and equipment include:
- High-Frequency Spindles for PCB drilling and precision machining
- Dental and Medical Handpieces
- High-Speed Automation & Robotics
- Precision Instrumentation and optical scanners
- Aerospace Actuators and auxiliary systems
