7216 ACD/HCP4ADBC
Hybrid Ceramic Super Precision Bearings
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7216 ACD/HCP4ADBC Bearing Product Overview & Core Advantages
The 7216 ACD/HCP4ADBC is a precision duplex pair of angular contact ball bearings designed for the most demanding applications. This matched set, arranged in a Back-to-Back (DB) configuration, is preloaded to deliver exceptional system rigidity and rotational accuracy. Its construction, featuring ceramic balls and a phenolic cage, is optimized for high-speed operation and the ability to handle significant combined loads (radial and axial). This bearing is the ideal solution for machine tool spindles and other high-performance machinery requiring maximum precision and reliability.
7216 ACD/HCP4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7216 | Basic bearing series and size code (80mm bore, 140mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates the bearing is part of a duplex pair. |
| HC | Refers to the Hybrid Ceramic construction (steel rings with ceramic balls). |
| P4A | Denotes an ultra-high precision tolerance class, exceeding ABEC 7/ISO P4. |
| DB | Specifies the Back-to-Back mounting arrangement of the duplex pair. |
| C | Indicates a Moderate Preload (Class C) applied to the matched set. |
7216 ACD/HCP4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The Back-to-Back (DB) duplex arrangement creates a wide, rigid support system that can withstand heavy combined radial and axial loads and tilting moments, ensuring exceptional stability under operation.
Superior High-Speed Performance: The combination of lightweight ceramic balls (Si3N4) and a phenolic resin cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 28,000 rpm. This hybrid design also reduces operating temperature and extends service life.
Ultra-Precision: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for achieving the highest levels of machining accuracy and surface finish quality.
Optimized for Performance: The Moderate Preload (C) eliminates internal clearance, enhancing stiffness and rotational accuracy right from installation without requiring complex adjustment procedures.
7216 ACD/HCP4ADBC Bearing Typical Application Areas
The 7216 ACD/HCP4ADBC is engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and milling spindles.
- Precision Rotary Systems: Industrial robots, rotary tables, and indexing heads.
- High-Speed Motors and Drives: Where low friction and high rotational accuracy are required.
- Advanced Medical and Aerospace Equipment: Applications demanding reliability and precision at high speeds.
