S71911 ACD/HCP4ADBC
Hybrid Ceramic Super Precision Bearings
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S71911 ACD/HCP4ADBC Bearing Product Overview & Core Advantages
The S71911 ACD/HCP4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched back-to-back (DB) arrangement provides superior stability and can accommodate combined radial and axial loads from both directions. Manufactured to ABEC 7 / P4A tolerance class with a ceramic ball and phenolic cage construction, it delivers outstanding high-speed performance, reduced friction, and extended service life in precision machinery.
S71911 ACD/HCP4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71911 | Precision angular contact ball bearing series with 55mm bore diameter |
| ACD | 25° contact angle, duplex back-to-back arrangement |
| HC | Hybrid ceramic balls (silicon nitride) |
| P4A | ABEC 7 / ISO P4A super precision tolerance class |
| DBC | Duplex back-to-back configuration with moderate preload (Class C) |
S71911 ACD/HCP4ADBC Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Stability: The duplex back-to-back arrangement creates a rigid bearing system that effectively resists moment loads and shaft deflection, making it ideal for precision applications requiring minimal runout.
Superior High-Speed Capability: The combination of hybrid ceramic balls and phenolic resin cage enables exceptional limiting speeds up to 34,000 rpm. Ceramic balls reduce centrifugal forces, lower friction, and minimize heat generation.
Optimized Load Capacity: With a 25° contact angle and precision ground raceways, this bearing efficiently handles combined radial and axial loads in both directions. The dynamic load rating of 6660 lbf ensures reliable performance under demanding conditions.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing delivers exceptional running accuracy and minimal vibration for precision applications.
S71911 ACD/HCP4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: CNC spindle motors, high-frequency motors, and servo drives
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
