71804 ACD/HCP4DGB
Hybrid Ceramic Super Precision Bearings
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71804 ACD/HCP4DGB Bearing Product Overview & Core Advantages
The 71804 ACD/HCP4DGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This universal matchable bearing features a light preload (Class B) and is capable of supporting combined radial and axial loads simultaneously. Its compact design, utilizing ceramic balls and a phenolic cage, makes it an ideal solution for high-speed spindle applications and other precision machinery where high rigidity and minimal thermal expansion are critical.
71804 ACD/HCP4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71804 | Basic bearing designation (20mm bore, 32mm OD, 14mm width) |
| ACD | 25° contact angle design optimized for high-speed operation |
| HCP4 | Hybrid Ceramic (Silicon Nitride) balls with P4 precision tolerance |
| DGB | Universal Matchable (SU) arrangement, light preload (Class B) |
71804 ACD/HCP4DGB Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, enabling higher limiting speeds (121,000 rpm) while providing excellent electrical insulation properties and reduced thermal expansion.
Precision Phenolic Cage: The phenolic resin cage offers superior strength-to-weight ratio and excellent performance at high speeds, contributing to the bearing's exceptional high-speed capability and smooth operation.
Universal Matchable Design: As a Universal Matchable (SU) bearing, it can be mounted in various configurations (back-to-back, face-to-face, or tandem) without requiring selective assembly, simplifying installation and maintenance procedures.
P4 Precision Class: Manufactured to P4 tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring consistent performance and high running accuracy in precision applications.
71804 ACD/HCP4DGB Bearing Typical Application Areas
- High-speed machining centers and CNC spindle systems
- Precision grinding spindles and dental handpieces
- Semiconductor manufacturing equipment and wafer handling systems
- Aerospace instrumentation and navigation systems
- High-frequency motor spindles and robotics applications
