7005 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7005 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The 7005 ACEGA/HCP4A is a single row angular contact ball bearing designed for the most demanding high-precision applications. Engineered to superior P4A tolerance class, this bearing delivers exceptional running accuracy and rotational stability. Its ceramic ball construction and phenolic cage enable outstanding high-speed performance, while the 25° contact angle provides excellent axial load capacity. As a universally matchable (SU) bearing supplied in a pre-set pair, it offers simplified installation and optimized performance in back-to-back or face-to-face arrangements.
7005 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 7005 | Standard bore diameter 25mm, outside diameter 47mm, width 12mm | Compact bearing dimensions for space-constrained applications |
| A | Extra light preload / Class A | Minimal friction, optimal for high-speed operation |
| CEGA | Ceramic balls (hybrid construction) | Reduced centrifugal forces, higher limiting speed, electrical insulation |
| HC | Phenolic resin cage | Lightweight construction for superior high-speed capability |
| P4A | Super precision tolerance class | Exceptional running accuracy and rotational precision |
7005 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, enabling higher rotational speeds while providing electrical insulation properties. This construction also offers improved durability in contaminated environments.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration, making it ideal for applications requiring exceptional rotational accuracy.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio, while the 25° contact angle and optimized internal geometry contribute to stable operation at the maximum limiting speed of 103,000 rpm.
Universal Matching Design: As a universally matchable (SU) bearing supplied in a pre-lubricated matched pair, it simplifies installation and ensures optimal preload distribution in duplex arrangements for enhanced system rigidity.
7005 ACEGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines requiring exceptional rotational accuracy
- High-Speed Motors: Electric motor spindles, high-frequency spindles, and servo motors where ceramic hybrid bearings reduce electrical erosion
- Aerospace Systems: Guidance systems, flight control actuators, and auxiliary power units demanding reliability at extreme speeds
- Medical Equipment: Dental handpieces, surgical tools, and laboratory centrifuges requiring contamination-free operation
- Robotics & Automation: Precision robotic joints, assembly robots, and pick-and-place systems needing high positional accuracy
