S7017 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7017 CD/P4A Bearing Product Overview & Core Advantages
The S7017 CD/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it is ideally suited for high-speed spindles and other precision machinery. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction—thanks to its specific 15° contact angle. The bearing comes preloaded and lubricated from the factory, ensuring immediate high-performance operation, reduced vibration, and simplified installation.
S7017 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S7017 CD/P4A provides detailed technical specifications:
- S: Denotes a bearing with a super-precision level.
- 7017: Indicates the standard bearing size series with an 85mm bore, 130mm outside diameter, and 22mm width.
- CD: Specifies a duplex arrangement with a specific preload level. This configuration ensures high system rigidity and precise shaft positioning.
- P4A: Defines the tolerance class. P4 is equivalent to ABEC-7, indicating extremely tight dimensional and running accuracy. The 'A' suffix often refers to specific accuracy requirements for the contact angle and other geometrical tolerances.
S7017 CD/P4A Bearing Structural Features & Performance Benefits
The design of the S7017 CD/P4A translates directly into superior performance:
- High Rigidity & Accuracy: The duplex (CD) preload arrangement eliminates internal clearance, providing maximum shaft support and minimizing deflection under load, which is critical for machining accuracy.
- Optimized Load Capacity: The 15° contact angle is optimized to efficiently support combined radial and axial loads, making it a robust choice for demanding applications.
- High-Speed Capability: The lightweight and robust phenolic resin cage guides the balls effectively, reducing friction and centrifugal forces, which contributes to a high limiting speed of 10,000 rpm.
- Sealed & Lubricated for Life: As a sealed unit, it is protected from contaminants. Pre-packed with high-quality grease suitable for a temperature range of -30°C to 110°C, it offers long-term, maintenance-free operation.
- Premium Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long service life.
S7017 CD/P4A Bearing Typical Application Areas
The S7017 CD/P4A is the bearing of choice in high-precision, high-speed rotational systems, including:
- Machine Tool Spindles: For CNC milling centers, lathes, and grinding machines where precision and rigidity are paramount.
- High-Frequency Motors & Spindles: Used in applications requiring very high rotational speeds with minimal runout.
- Precision Instrumentation: In medical devices, optical scanners, and measuring equipment.
- Aerospace & Defense Systems: For gyroscopes, radar systems, and other critical components requiring reliable performance under stringent conditions.
