S71911 CB/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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S71911 CB/HCP4ADBA Bearing Product Overview & Core Advantages
The S71911 CB/HCP4ADBA is a high-precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stability and can accommodate combined radial and axial loads from both directions. Manufactured to a P4A tolerance class and featuring a phenolic cage with ceramic balls, it is engineered for high-speed operation and long service life in precision machinery.
S71911 CB/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Angular Contact Ball Bearing Series |
| 71911 | Basic bearing designation (55mm bore, 80mm OD, 26mm width) |
| C | 15° Contact Angle |
| B | 40° Contact Angle |
| HC | Hybrid Ceramic (Ceramic balls with steel rings) |
| P4A | High Precision Tolerance Class (equivalent to ABEC 7) |
| DB | Duplex Back-to-Back arrangement |
| A | Extra Light Preload |
S71911 CB/HCP4ADBA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of ceramic balls and chrome steel rings significantly reduces friction, heat generation, and wear, enabling higher limiting speeds (34,000 rpm) and extended service life compared to all-steel bearings.
Duplex Back-to-Back (DB) Design: This preloaded, matched pair configuration delivers exceptional system rigidity and moment load capacity, making it ideal for applications where shaft deflection must be minimized.
Phenolic Cage: The lightweight and robust phenolic resin cage contributes to smooth operation at high speeds and is suitable for the specified temperature range.
Precision Engineering: The P4A tolerance class ensures minimal runout and vibration, which is critical for maintaining accuracy in high-speed spindles and precision equipment.
Sealed & Grease Lubricated: The sealed design with factory-applied grease simplifies installation and provides long-term, maintenance-free operation in clean environments.
S71911 CB/HCP4ADBA Bearing Typical Application Areas
The S71911 CB/HCP4ADBA is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Rotary Tables
- High-Frequency Motors and Spindle Drives
- Aerospace & Defense instrumentation
- Medical Equipment (e.g., high-speed dental handpieces)
