S71930 ACD/HCP4ADGB
Hybrid Ceramic Super Precision Bearings
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S71930 ACD/HCP4ADGB Bearing Product Overview & Core Advantages
The S71930 ACD/HCP4ADGB is a high-precision double row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. This sealed bearing is designed to accommodate combined loads—significant radial loads and bidirectional axial loads—simultaneously. Manufactured to the exacting P4A tolerance class, it features a universal matchable (SU) design, allowing two bearings to be mounted in any configuration (face-to-face, back-to-back, or tandem) without pre-set internal clearance adjustments. Its compact design, incorporating ceramic balls and a phenolic cage, delivers superior high-speed performance, rigidity, and extended service life in precision machinery.
S71930 ACD/HCP4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | High-precision angular contact ball bearing series. |
| 1930 | Standardized size designation (Bore: 150mm, OD: 210mm, Width: 56mm). |
| ACD | Contact angle of 25° and specific internal design. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for reduced weight, higher speed capability, and longer life. |
| P4A | Ultra-high precision tolerance class, exceeding ABEC 7/ISO P4 standards, with specific running accuracy requirements. |
| DGB | Universal Matchable (SU): The bearing is supplied as one of a universally matchable pair (set of 2), enabling flexible mounting arrangements. |
S71930 ACD/HCP4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides a robust, compact footprint capable of supporting high radial dynamic load ratings of 40050 lbf and radial static load ratings of 56250 lbf, along with substantial bidirectional thrust loads.
- Superior High-Speed Performance: The combination of lightweight ceramic balls and a phenolic resin cage minimizes centrifugal forces and friction, enabling a high limiting speed of 11,000 rpm. The 25° contact angle is optimized for high-speed operation with axial loads.
- Enhanced Durability & Low Maintenance: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is effectively maintenance-free within its specified temperature range of -30°C to 110°C. The hybrid ceramic construction also provides inherent resistance to wear and electrical arcing.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, ensuring predictable performance and minimal runout in the most demanding precision applications.
S71930 ACD/HCP4ADGB Bearing Typical Application Areas
The S71930 ACD/HCP4ADGB is ideally suited for high-performance machinery where precision, speed, and reliability are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors and Spindles
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and other critical rotating assemblies.
- Medical Equipment: Dental handpieces, centrifuges, and imaging device rotors.
