S71922 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71922 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S71922 CEGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This single bearing features a 15° contact angle and is manufactured to P4A tolerance class for superior running precision. Its core advantages include the ability to handle combined loads (radial and axial) simultaneously, excellent high-speed capability facilitated by a phenolic cage and ceramic balls, and long service life due to its sealed and pre-lubricated design. The use of ceramic ball material further enhances its performance in high-speed and non-lubricated marginal conditions.
Model Code Breakdown
| Code Segment | Technical Meaning | Benefit / Implication |
|---|---|---|
| S71922 | Bearing series and size designation (110mm bore, 150mm OD, 20mm width) | Defines the core bearing dimensions and series. |
| CE | Contact angle of 15° | Optimized for handling axial loads and providing high rigidity. |
| GA | Preload: Extra Light (Class A) | Reduces noise and vibration, improves rotational accuracy for high-speed applications. |
| HC | Ceramic (Hybrid Ceramic) balls | Lower density reduces centrifugal forces, enabling higher speeds and longer life. |
| P4A | Tolerance class: P4A (super precision) | Guarantees extremely tight dimensional and running accuracy for precision machinery. |
S71922 CEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of steel rings and ceramic balls (Si3N4) significantly reduces rolling element weight, which minimizes centrifugal forces and gyroscopic slipping. This is fundamental to achieving the high limiting speed of 10,000 rpm and provides operational benefits in electrically insulated or low-lubrication scenarios.
Phenolic Resin Cage: The lightweight and robust phenolic cage contributes to smooth operation at high speeds, offers good guiding for the ceramic balls, and possesses inherent lubricity and damping properties.
Extra Light Preload (GA): This preload classification ensures minimal internal clearance under operating conditions, resulting in superior shaft positioning accuracy, high system rigidity, and reduced noise levels—ideal for applications where precise rotational control is critical.
Sealed & Pre-lubricated: The sealed design effectively excludes contaminants while retaining grease, making the bearing ready for immediate use and contributing to a maintenance-free operational life within the specified temperature range of -30°C to 110°C.
S71922 CEGA/HCP4A Bearing Typical Application Areas
The S71922 CEGA/HCP4A is designed for high-performance applications where speed, precision, and reliability are paramount. Typical uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors & Spindles: Motors for PCB drilling and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and auxiliary power units.
- Medical Equipment: Centrifuges and CT/MRI scanner gantries.
