S71904 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71904 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S71904 CEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a single, universal matchable design that simplifies installation and ensures optimal performance in preloaded arrangements. Its construction with ceramic balls and a P4A super-precision tolerance class delivers superior high-speed capability, reduced friction, and extended service life, making it an ideal choice for high-reliability spindles and precision machinery.
S71904 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71904 | Basic bearing series, indicating a super-precision angular contact ball bearing with a 20mm bore, 37mm OD, and 9mm width. |
| CE | Enhanced internal geometry and a 15° contact angle for optimized performance under axial loads. |
| GA | Indicates the bearing is part of a universally matchable set (SU designation), allowing any bearing to be paired with another from the same set without loss of preload. |
| HC | Refers to the hybrid ceramic construction, featuring ceramic (silicon nitride) balls. |
| P4A | The tolerance class, denoting super-precision levels with very tight running accuracy and dimensional tolerances for high-speed, high-rigidity applications. |
S71904 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperatures, and provides electrical insulation. This results in higher limiting speeds (75,000 rpm), longer lubricant life, and superior performance in high-speed applications.
- Phenolic Resin Cage: The lightweight and robust phenolic cage contributes to smooth operation at high speeds and offers excellent dimensional stability.
- Super-Precision P4A Tolerance: Ensures minimal runout and vibration, which is critical for achieving high rotational accuracy and surface finish in machining applications.
- Universal Matchability (SU): As part of a matched set of 4 bearings, the universal design allows for simplified mounting and consistent preload control, enhancing system rigidity and performance.
- Sealed & Pre-Lubricated: The sealed design with grease lubrication protects against contamination and is suitable for the specified operating temperature range (-30°C to 110°C), offering a maintenance-free solution for the bearing's service life in many applications.
S71904 CEGA/HCP4A Bearing Typical Application Areas
This high-performance bearing is engineered for use in precision equipment where speed, accuracy, and reliability are paramount. Key applications include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Motors
- Semiconductor Manufacturing Equipment
- Medical and Dental Handpieces
- Aerospace Instrumentation
