S71911 ACE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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S71911 ACE/HCP4ADBA Bearing Product Overview & Core Advantages
The S71911 ACE/HCP4ADBA is a high-precision duplex back-to-back angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This matched bearing set features a P4A tolerance class and a 25° contact angle, enabling it to handle combined radial and axial loads simultaneously. Its construction with ceramic balls and a phenolic cage contributes to superior high-speed performance and reduced weight, making it ideal for high-reliability, high-rigidity spindle applications.
S71911 ACE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel (Note: Specification indicates Chrome Steel rings) |
| 7 | Angular Contact Ball Bearing |
| 1911 | Bore Diameter: 55 mm, Outside Diameter: 80 mm, Width: 26 mm |
| ACE | 25° Contact Angle, Sealed, Phenolic Cage |
| HC | Hybrid Ceramic (Ceramic Balls with Steel Rings) |
| P4A | High Precision Tolerance Class (Superior to ABEC 7) |
| DB | Duplex Back-to-Back Matched Arrangement |
S71911 ACE/HCP4ADBA Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system capable of withstanding combined loads and significant moment loads. The 25° contact angle is optimized for handling substantial axial loads in both directions.
Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a high limiting speed of 34,000 rpm. This hybrid design also reduces operating temperature and extends service life.
High Precision and Accuracy: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and precise rotational accuracy, which is critical for applications demanding extreme positioning repeatability.
Sealed and Pre-Lubricated: The integral seals protect against contamination, and the bearing is pre-lubricated with grease, providing a maintenance-free solution within its specified temperature range of -30°C to 110°C.
S71911 ACE/HCP4ADBA Bearing Typical Application Areas
This high-performance duplex angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving machines, and semiconductor manufacturing equipment.
- High-Speed Motors: Where high rigidity and low vibration are required.
- Robotics: High-accuracy rotary joints and arm actuators.
- Medical Equipment: Dental handpieces and small precision instruments.
