7017 ACD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7017 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 7017 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high system rigidity. This matched back-to-back (DB) arrangement is preloaded to Light / Class B specifications, ensuring minimal axial and radial play for superior positional accuracy. Its primary advantage lies in its ability to handle combined loads—significant radial and bidirectional axial loads simultaneously—making it ideal for high-precision, high-stiffness applications in demanding environments.
7017 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing series and size designation (85mm bore, 130mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two single bearings supplied as a set). |
| P4A | High-Precision Tolerance Class, exceeding normal ABEC-7/ISO P4 standards, with enhanced running accuracy. |
| DB | Back-to-Back mounting arrangement. This configuration provides high moment rigidity. |
| B | Light Preload / Class B. |
7017 ACD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, stable support system that significantly increases the bearing's resistance to moment loads and tilting moments. This setup, combined with the 25° contact angle, provides excellent capability for handling combined radial and axial loads.
Precision & High-Speed Performance: Manufactured to a P4A tolerance class, this bearing guarantees extremely tight dimensional and running accuracy. The lightweight phenolic resin cage is optimized for high-speed operation, contributing to a limiting speed of 17,000 rpm. The open design allows for efficient lubrication management in complex systems.
Material & Durability: Constructed from high-grade chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance. The set comes pre-lubricated and is ready for installation, operating effectively within a temperature range of -30°C to 110°C.
7017 ACD/P4ADBB Bearing Typical Application Areas
The 7017 ACD/P4ADBB is engineered for high-performance machinery where precision and rigidity are paramount. Key applications include:
- Machine Tool Spindles: For milling, grinding, and turning centers requiring high-speed accuracy and stiffness.
- Precision Gearboxes: Especially in robotics and automation where low backlash and high positional accuracy are critical.
- High-Frequency Motors and Spindles: Applications demanding smooth operation at very high rotational speeds.
- Medical and Laboratory Equipment: Where reliable, precise, and quiet operation is essential.
