S71910 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71910 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S71910 CDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. As a single bearing from a universally matchable (SU) set, it is designed to accommodate combined loads (radial and axial) simultaneously. Its core advantages stem from a P4A super-precision tolerance class, an Extra Light (Class A) preload, and the use of advanced materials including ceramic balls and a phenolic cage. This combination delivers superior high-speed capabilityhigh rigidity, and extended service life, making it ideal for high-reliability spindles and precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S71910 | Bearing series and size designation | Indicates a 50mm bore, 72mm OD, 12mm width high-precision angular contact bearing. |
| C | 15° Contact Angle | Optimized for high-speed operation and moderate axial load capacity. |
| DG | Universal Matchable (SU) | The bearing is ground to universal matching standards, allowing it to be paired with another bearing to form a pre-set duplex arrangement. |
| A | Extra Light Preload (Class A) | Provides minimal internal clearance for maximum rotational accuracy and rigidity under high-speed, low-load conditions. |
| HC | Hybrid Ceramic | Signifies the use of ceramic balls, which reduce centrifugal forces, lower friction, and allow for higher limiting speeds. |
| P4A | Tolerance Class | Denotes super-precision dimensional and running accuracy, superior to ABEC 7/ISO P4. |
S71910 CDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of silicon nitride (Si3N4) ceramic balls significantly reduces weight and inertial forces compared to steel. This is critical for achieving the high limiting speed of 34,000 rpm, as it minimizes friction and heat generation.
Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and guidance at high speeds, contributing to smooth and quiet operation.
High Rigidity & Precision: The combination of the 15° contact angle and Class A preload ensures high system rigidity and minimal axial/radial runout, which is essential for maintaining precision in machining and positioning applications.
Sealed & Grease-Lubricated: The bearing is sealed and pre-lubricated with high-performance grease, protecting against contamination and providing maintenance-free operation within its specified temperature range of -30°C to 110°C.
Load Capacity: With a dynamic load rating of 3038 lbf and a static load rating of 2340 lbf, it is capable of handling significant combined loads for its compact size.
S71910 CDGA/HCP4A Bearing Typical Application Areas
The S71910 CDGA/HCP4A is ideally suited for high-performance applications where speed, accuracy, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Spindles: PCB drilling and routing spindles.
- Robotics: High-accuracy joints and actuators.
- Aerospace & Defense: Gyroscopes, navigation systems, and other critical rotating assemblies.
