71806 ACD/HCP4DGC
Hybrid Ceramic Super Precision Bearings
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71806 ACD/HCP4DGC Bearing Product Overview & Core Advantages
The 71806 ACD/HCP4DGC is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This universally matchable (SU) bearing is designed to accommodate combined loads (radial and axial) simultaneously. Its core advantages stem from a P4 tolerance class, ceramic ball construction, and phenolic cage, enabling superior high-speed capabilities, reduced friction, and extended service life in precision machinery.
71806 ACD/HCP4DGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71806 | Bearing series and size designation | Indicates a light series bearing with a 30mm bore, 42mm OD, and 14mm width. |
| ACD | 25° Contact Angle, High Precision | Optimized for high axial load capacity and rigid support. |
| HC | Hybrid Ceramic | Signifies the use of ceramic balls, offering electrical insulation, lower density, and superior high-speed performance. |
| P4 | Tolerance Class | Denotes ultra-precision manufacturing tolerances for minimal runout and vibration. |
| DGC | Phenolic Cage, Universal Match | Indicates a lightweight, self-lubricating phenolic cage and that the bearing is universally matchable (SU) for simplified preload setting in pairs. |
71806 ACD/HCP4DGC Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, lowers operating temperature, and enables a limiting speed of 100,500 rpm. This makes it ideal for high-speed spindle applications.
High Rigidity & Load Capacity: The 25° contact angle and Moderate (Class C) preload provide excellent stiffness, allowing the bearing to effectively handle combined radial and axial loads with minimal deflection.
Precision & Stability: Manufactured to P4 tolerance class, this bearing ensures extreme dimensional accuracy and rotational precision, which is critical for applications demanding high positional accuracy and low vibration.
Optimized Cage Design: The phenolic cage is lightweight, robust, and offers good sliding properties, contributing to smooth operation at high speeds and reduced cage wear.
71806 ACD/HCP4DGC Bearing Typical Application Areas
The 71806 ACD/HCP4DGC is specified for high-performance machinery where speed, precision, and reliability are paramount. Key sectors include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Instrumentation: Measuring devices, optical scanners.
- High-Frequency Motors & Turbomachinery: Electric spindles, small turbines, and compressors.
- Semiconductor Manufacturing Equipment: Wafer handling robots, stepper stages.
