71806 ACDGA/HCP4
Hybrid Ceramic Super Precision Bearings
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71806 ACDGA/HCP4 Bearing Product Overview & Core Advantages
The 71806 ACDGA/HCP4 is a super-precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. This single bearing features a 25° contact angle and is manufactured to P4 tolerance class, ensuring ultra-precise running characteristics. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, superior high-speed capability facilitated by a phenolic cage and ceramic balls, and outstanding operational reliability in demanding environments. The bearing is universally matchable, allowing for flexible mounting arrangements in pairs to handle complex load conditions.
71806 ACDGA/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71806 | Basic bearing series and size designation (30mm bore, 42mm OD, 7mm width). |
| AC | Angular Contact design. |
| D | High ball complement for increased load capacity. |
| GA | Universal matching bearing. Two bearings can be mounted in any combination (face-to-face, back-to-back, or tandem) to achieve the desired preload and rigidity. |
| HC | Hybrid Ceramic: Features ceramic balls (Si3N4) for reduced weight, lower friction, and higher speed capability. |
| P4 | Tolerance class equivalent to ISO Class 4 (ABEC 7), denoting very high running accuracy. |
71806 ACDGA/HCP4 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially under high-speed conditions.
- Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability and low friction, contributing to the bearing's high limiting speed of 100,500 rpm.
- High-Precision P4 Grade: Manufactured to ultra-tight dimensional and running accuracy tolerances, this bearing ensures minimal vibration and precise rotational performance, which is critical for precision machinery.
- 25° Contact Angle & Universal Matchability: The optimized contact angle provides a strong balance between radial and axial load capacity. The universal matching (SU) feature allows for easy pairing to create a stiff, preloaded bearing set capable of handling complex combined loads.
- Open Seal & Pre-lubrication: The open design minimizes friction torque and is suitable for systems with centralized lubrication. The bearing comes pre-lubricated for immediate operation.
71806 ACDGA/HCP4 Bearing Typical Application Areas
This high-precision, high-speed angular contact bearing is ideally suited for advanced applications where accuracy and rotational speed are paramount. Key industries and equipment include:
- High-Frequency Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling applications.
- Precision Robotics: In high-speed robotic arms and joints requiring high rigidity and accuracy.
- Dental and Medical Handpieces: Where extreme speeds and reliability are essential.
- High-Speed Motors and Drives: Particularly in aerospace and semiconductor manufacturing equipment.
- Advanced Pump and Compressor Systems: For handling high rotational speeds with minimal maintenance.
