S71930 ACD/HCPA9AQGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71930 ACD/HCPA9AQGA Bearing Product Overview & Core Advantages
The S71930 ACD/HCPA9AQGA is a high-precision double row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. Its design excels at simultaneously handling combined loads, including significant radial and bidirectional axial loads. A key feature is its universal matchable (SU) designation, allowing bearings to be mounted in any combination (face-to-face, back-to-back, or tandem) without preload or performance variation. Manufactured to an ultra-precise PA9A tolerance class and featuring a ceramic ball and phenolic cage construction, this bearing is optimized for high-speed operation and delivers superior rigidity and long-term performance in compact installations.
Model Code In-Depth Explanation
- S7: High-precision bearing series.
- 1930: Standard dimension series; 30 mm bore code (actual bore: 150 mm).
- ACD: 25° contact angle and specific internal design.
- H: Ceramic balls.
- C: Phenolic cage.
- PA9A: Ultra-high tolerance class (geometric and running accuracy).
- QGA: Specific internal clearance and preload designation (Extra light / Class A preload).
S71930 ACD/HCPA9AQGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design provides a significantly wider effective load spread than single row bearings, resulting in superior rigidity and stability. This enables the bearing to support substantial combined radial and axial loads from both directions.
High-Speed Performance: The combination of lightweight phenolic cage and low-density, low-friction ceramic balls reduces centrifugal forces and operating temperatures, enabling a high limiting speed of 11,000 rpm.
Precision & Longevity: Manufactured to the stringent PA9A tolerance class, this bearing ensures minimal runout and vibration for ultra-smooth operation. The standard grease lubrication and sealed design provide maintenance-free operation within the specified temperature range of -30°C to 110°C.
S71930 ACD/HCPA9AQGA Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Typical applications include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace & Defense Systems
- Medical & Laboratory Equipment
