71805 CDGA/HCP4
Hybrid Ceramic Super Precision Bearings
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71805 CDGA/HCP4 Bearing Product Overview & Core Advantages
The 71805 CDGA/HCP4 is a single-row angular contact ball bearing engineered for ultra-high precision applications. Designed with a 15° contact angle and manufactured to ABEC 7 / P4 tolerance class, this bearing delivers exceptional running accuracy and dimensional stability. Its core advantages include the ability to accommodate combined radial and axial loads in one direction, superior high-speed performance enabled by its phenolic cage and ceramic balls, and universal matchability (SU) for simplified preload setting in duplex arrangements.
71805 CDGA/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71805 | Basic bearing designation (25mm bore, 37mm OD, 7mm width) |
| C | 15° contact angle design |
| DG | Universal matchable bearing (can be paired in any combination) |
| A | Extra light preload classification |
| HC | Hybrid ceramic construction (steel rings with ceramic balls) |
| P4 | ABEC 7 / ISO P4 precision tolerance class |
71805 CDGA/HCP4 Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, enabling higher limiting speeds (103,000 rpm) and reduced operating temperatures. This construction also provides superior electrical resistance and extended service life.
Phenolic Cage: The lightweight phenolic resin cage offers excellent dimensional stability at high speeds and provides superior guidance for the ceramic balls, contributing to smooth operation and reduced vibration.
Precision Engineering: Manufactured to P4 tolerance class with tight dimensional controls on bore, outside diameter, and width, ensuring predictable performance and precise shaft positioning in demanding applications.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be paired in any combination (back-to-back, face-to-face, or tandem) to create preloaded sets without selective matching, simplifying inventory and assembly processes.
71805 CDGA/HCP4 Bearing Typical Application Areas
- High-Speed Machine Tool Spindles - For CNC machining centers and precision grinding machines
- Precision Instrumentation - Medical devices, optical equipment, and measuring instruments
- Aerospace Components - Guidance systems, actuators, and auxiliary power units
- Semiconductor Manufacturing Equipment - Wafer handling robots and precision positioning stages
- High-Frequency Motor Spindles - For applications requiring extreme rotational accuracy and minimal vibration
