S7017 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7017 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S7017 CDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. Its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high rigidity. Manufactured to a P4A super-precision tolerance class and featuring a universal matching (SU) designation, it is designed for high-speed operation up to 28,000 rpm. The combination of a ceramic ball material and a phenolic cage contributes to its high-speed capability, low heat generation, and extended service life, making it an ideal choice for high-rigidity and high-reliability spindles and precision machinery.
Model Code Breakdown
| Suffix Code | Technical Meaning |
|---|---|
| S7017 | Standard bearing series with 85 mm bore, 130 mm OD. |
| CD | 15° contact angle and universal matchable design, allowing for precise preload when mounted in pairs. |
| GA | Indicates a matched set of two bearings supplied with Extra light (Class A) preload. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for reduced friction, higher speed, and longer life. |
| P4A | The bearing is manufactured to a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, for exceptional running accuracy. |
S7017 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, friction, and heat generation. This directly enables higher limiting speeds, reduced wear, and extended lubrication life.
- Phenolic Resin Cage: The lightweight and robust phenolic cage is ideal for high-speed applications, offering excellent dimensional stability and low friction operation under high centrifugal forces.
- Universal Matchable Design (SU): The CD geometry allows any two bearings to be mounted together (in back-to-back or face-to-face arrangements) to achieve a pre-defined preload (Extra Light / Class A). This simplifies installation and ensures optimal system stiffness and running accuracy.
- Super-Precision P4A Tolerances: Extremely tight control over bore diameter, outside diameter, and width ensures minimal runout and vibration, which is critical for the performance of machine tool spindles and other precision equipment.
- High Load Capacity: With a dynamic load rating of 15,210 lbf and a static load rating of 14,738 lbf, this bearing is capable of handling significant combined radial and axial loads.
S7017 CDGA/HCP4A Bearing Typical Application Areas
The S7017 CDGA/HCP4A is specifically designed for high-performance machinery where speed, accuracy, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Dental and Medical Handpiece Spindles
- Aerospace Test Equipment
- High-Performance Pumps and Compressors
