S71911 CB/HCP4AQGA
Hybrid Ceramic Super Precision Bearings
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S71911 CB/HCP4AQGA Bearing Product Overview & Core Advantages
The S71911 CB/HCP4AQGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. This sealed, universally matchable bearing is designed to accommodate combined loads (radial and axial) simultaneously. Its P4A tolerance class and use of ceramic balls contribute to superior high-speed performance and long service life, making it ideal for high-rigidity, precision spindle configurations.
S71911 CB/HCP4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel Bearing Series |
| 7 | Angular Contact Ball Bearing |
| 1911 | Bore Diameter: 55 mm, Outside Diameter: 80 mm, Width: 52 mm |
| CB | Universal Matchable (SU) bearing, can be mounted in any combination |
| HC | Hybrid Ceramic (Ceramic balls with steel rings) |
| P4A | High Precision Tolerance Class (Equivalent to ABEC 7) |
| QGA | Specific internal design and cage type (Phenolic cage) |
S71911 CB/HCP4AQGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces friction, heat generation, and wear. This results in a higher limiting speed (34,000 rpm) and extended service life compared to all-steel bearings.
High Rigidity & Load Capacity: The 15° contact angle and precision-ground raceways provide excellent support for combined loads, offering high rigidity for stable operation in precision machinery.
Precision & Speed: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration. The lightweight phenolic resin cage is ideal for high-speed applications, contributing to smooth rotation and reduced centrifugal forces.
Sealed & Pre-lubricated: The integral seals protect against contamination and retain grease, making the bearing maintenance-free for its entire service life. The pre-applied grease is suitable for a temperature range of -30°C to 110°C.
S71911 CB/HCP4AQGA Bearing Typical Application Areas
The S71911 CB/HCP4AQGA is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high accuracy and rigidity.
- High-Frequency Motors & Spindles: Where low inertia and high-speed capability are critical.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aerospace & Defense: Gyroscopes, navigation systems, and other precision instruments.
