7005 ACDGC/HCP4A
Hybrid Ceramic Super Precision Bearings
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7005 ACDGC/HCP4A Bearing Product Overview & Core Advantages
The 7005 ACDGC/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is distinguished by its ceramic balls and P4A super-precision tolerance, enabling superior high-speed capability and minimal rotational vibration. Its 25° contact angle and Moderate (Class C) preload provide excellent rigidity and are optimized to handle combined radial and axial loads simultaneously. As a Universal Matchable (SU) bearing, it can be supplied in sets of three for simplified mounting in pre-adjusted, duplex configurations, offering a compact and highly reliable solution for the most critical spindle assemblies.
7005 ACDGC/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 7005 | Basic bearing series, indicating a 25 mm bore, 47 mm OD, and 12 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| DGC | Duplex arrangement configuration (likely "Back-to-Back" or "Face-to-Face") for which this bearing is ground and preloaded. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Specifies the tolerance class, which is a super-precision grade with running accuracy requirements tighter than ABEC 7. |
7005 ACDGC/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially at high speeds (up to 85,000 rpm dmn).
Phenolic Resin Cage: The lightweight and robust phenolic cage ensures excellent guidance and stability at high rotational speeds, contributing to smooth and quiet operation.
High Rigidity & Load Capacity: The 25° contact angle and moderate preload provide a stiff bearing setup that effectively resists operational deflection, enhancing machining accuracy. It offers a dynamic load rating of 2077 lbf and a static load rating of 1125 lbf.
Super-Precision Performance: The P4A tolerance class guarantees extremely tight dimensional and running accuracy, resulting in superior rotational precision and minimal non-repetitive runout (NRR).
7005 ACDGC/HCP4A Bearing Typical Application Areas
The 7005 ACDGC/HCP4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes.
- High-Frequency Motors & Spindles: Used in PCB drilling, dental handpieces, and small precision motors.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and auxiliary power units.
- Medical Equipment: Centrifuges and high-speed dental drills.
