S71917 ACE/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71917 ACE/HCP4AQBCA Bearing Product Overview & Core Advantages
The S71917 ACE/HCP4AQBCA is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This sealed metric bearing features a back-to-back quadruplex arrangement, enabling it to handle significant combined loads (radial and axial) from multiple directions simultaneously. Manufactured to ABEC 7 / P4A tolerance class with an extra light preload and ceramic balls, it delivers superior running accuracy, high-speed capability, and extended service life in compact installations.
S71917 ACE/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| S71917 | Precision angular contact bearing series with 85mm bore | Denotes high-precision design and dimensional specifications |
| ACE | 25° contact angle, phenolic cage, optimized internal design | Enhances axial load capacity and high-speed performance |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Reduces friction, increases speed capability, and extends service life |
| P4A | ABEC 7 / ISO P4A tolerance class | Ensures exceptional running accuracy and dimensional precision |
| QBC | Quadruplex Back-to-Back arrangement | Provides maximum rigidity and moment load capacity |
S71917 ACE/HCP4AQBCA Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Load Capacity: The quadruplex back-to-back configuration creates an exceptionally stiff bearing system capable of withstanding heavy combined loads and significant moment loads. This arrangement provides superior bearing rigidity critical for precision applications.
High-Speed Performance: The combination of hybrid ceramic balls and phenolic cage enables outstanding high-speed operation up to 28,000 rpm. Ceramic balls reduce centrifugal forces, lower operating temperatures, and minimize wear.
Precision Engineering: Manufactured to P4A tolerance class with extra light preload, this bearing delivers exceptional running accuracy and minimal vibration. The precise bearing dimensions (85mm bore × 120mm OD × 72mm width) ensure consistent performance.
Sealed & Lubricated Design: The sealed construction with factory-applied grease provides contamination protection and maintenance-free operation within the specified temperature range of -30°C to 110°C.
S71917 ACE/HCP4AQBCA Bearing Typical Application Areas
- High-speed machine tool spindles requiring extreme precision and rigidity
- Precision grinding machines and high-speed machining centers
- Industrial pumps and compressors demanding high reliability
- Aerospace positioning systems and robotic actuators
- Medical equipment spindles and laboratory instruments
- Semiconductor manufacturing equipment requiring contamination control
