71930 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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71930 ACD/HCP4A Bearing Product Overview & Core Advantages
The 71930 ACD/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. This P4 (ABEC-7) tolerance class bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, with a 25° contact angle that optimizes performance. Its ceramic balls and phenolic cage contribute to superior high-speed capabilities and reduced operational friction, making it an ideal solution for demanding, high-accuracy machinery.
71930 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71930 | Basic bearing series and size designation (150mm bore, 210mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | High load capacity internal design. |
| HC | Hybrid Ceramic: Features ceramic balls for enhanced speed and durability. |
| P4 | Precision class P4 (ABEC-7), indicating extremely tight dimensional and running accuracy tolerances. |
| A | Specific internal geometry and preload designation. |
71930 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class, this bearing ensures minimal runout and vibration, providing stable and precise shaft rotation essential for high-accuracy equipment.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for a high limiting speed of 10,000 rpm, reducing friction and heat generation.
- Optimized Load Capacity: The 25° contact angle and robust internal geometry are engineered to handle significant combined radial and axial loads, with a dynamic load rating of 24,300 lbf and a static load rating of 28,125 lbf.
- Preload and Stability: The bearing is supplied with a specific preload, which increases system stiffness, minimizes axial and radial play, and improves positional accuracy under operational loads.
- Wide Temperature Range: Suitable for operation in a temperature range from -30°C to 110°C, accommodating various industrial environments.
71930 ACD/HCP4A Bearing Typical Application Areas
The 71930 ACD/HCP4A is ideally suited for high-performance machinery where precision, speed, and reliability are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high accuracy and rigidity.
- High-Frequency Motors and Spindles: Applications in CNC machining and PCB drilling.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
