7216 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7216 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7216 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and reliability. This single-row bearing features a 25° contact angle and is supplied with a preload, delivering superior high rigidity and precise shaft positioning. Its construction with ceramic balls and a phenolic cage enables outstanding high-speed performance, making it ideal for machine tool spindles and other high-velocity machinery. The bearing is pre-lubricated for immediate operation and is characterized by its ability to accommodate combined loads (radial and axial) simultaneously.
7216 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7216 | Basic bearing designation indicating a metric series with 80 mm bore, 140 mm OD, and 26 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high-precision design with optimized internal geometry. |
| HCP4A | Indicates the bearing is supplied with a preload (A-light) and conforms to the P4 (ABEC-7) tolerance class for exceptional running accuracy. |
7216 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The 25° contact angle and applied preload provide high axial stiffness and excellent resistance to deflection under combined loads, ensuring precise shaft guidance and minimal runout.
- Superior High-Speed Performance: The combination of lightweight ceramic balls (silicon nitride) and a phenolic resin cage reduces centrifugal forces and inertial friction, enabling a high limiting speed of 17,000 rpm. This construction also offers reduced heat generation and lower vibration levels.
- Exceptional Precision: Manufactured to a P4 (ABEC-7) tolerance class with tight dimensional and running accuracy tolerances, this bearing is designed for applications where minimal rotational error is critical.
- Optimized for Performance: The open seal type allows for custom lubrication schemes, while the phenolic cage provides excellent dimensional stability and low friction at high speeds.
7216 ACD/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Robotics and Automation Equipment
- Aerospace and Defense Actuation Systems
- Medical and Dental High-Speed Handpieces
