S71917 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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S71917 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S71917 CDGA/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a single bearing with Universal Matchable (SU) designation, it enables simplified preload setting when paired with an identical bearing. Its core advantages include the ability to handle combined loads (radial and axial) efficiently, facilitated by a 15° contact angle. Manufactured to a P4A tolerance class, it guarantees ultra-precise dimensions and runout, making it ideal for high-speed spindles and other precision machinery. The combination of a ceramic ball and phenolic cage material contributes to its high performance.
S71917 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Advantage |
|---|---|---|
| S71917 CDGA | Denotes the bearing series and size (85mm bore, 120mm OD, 18mm width). The "S" prefix often indicates a super-precision bearing. | Identifies the core bearing dimensions and high-precision nature. |
| HC | Indicates a Hybrid Ceramic bearing construction. | Ceramic balls offer reduced weight, lower friction, and superior performance at high speeds. |
| P4A | Specifies the tolerance class, equivalent to ABEC 7/ISO P4. The "A" suffix indicates specific tolerance deviations for universal matching. | Ensures extremely tight dimensional and running accuracy for demanding applications. |
S71917 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially under high-speed conditions (up to 17,000 rpm).
- Phenolic Cage: The lightweight and robust phenolic resin cage ensures stable operation at high speeds and offers good compatibility with the grease lubrication.
- Precision Engineering: Manufactured to P4A tolerances, this bearing provides exceptional running accuracy and low vibration levels, which is critical for high-rigidity support in precision systems.
- Universal Matching (SU): This feature allows two identical bearings to be mounted together in a universal arrangement to achieve a specific preload (Extra light / Class A in this case), simplifying installation and ensuring optimal performance.
- Sealed & Grease-Lubricated: The sealed design retains the factory-fill grease and protects against contamination, offering a maintenance-free solution within its specified temperature range (-30°C to 110°C).
S71917 CDGA/HCP4A Bearing Typical Application Areas
The S71917 CDGA/HCP4A is engineered for high-performance applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Instrumentation: Measuring devices, optical scanners.
- High-Speed Motors: Servo motors, spindle motors.
- Aerospace & Defense Systems: Gyroscopes, navigation equipment.
