7017 CD/PA9ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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7017 CD/PA9ADBC Bearing Product Overview & Core Advantages
The 7017 CD/PA9ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched pair is arranged in a back-to-back (DB) configuration, providing superior resistance to moment loads and offering high operational stability. Preloaded to Moderate / Class C, it ensures minimal axial and radial play, making it ideal for high-precision spindles and machinery where high rigidity and precise rotational accuracy are paramount. Its design is optimized to handle combined loads efficiently.
7017 CD/PA9ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing designation indicating a bore diameter of 85 mm and a standard metric series. |
| C | Specifies a 15° contact angle, optimized for handling significant axial loads in one direction. |
| D | Indicates the bearing is part of a duplex (matched) set. |
| DB | Denotes the Back-to-Back arrangement of the matched pair, providing high moment stiffness. |
| PA9A | Specifies an extremely high tolerance class (PA9A) and preload level (Moderate / Class C) for exceptional running accuracy. |
| Open | The seal type is open, allowing for customized lubrication schemes but requiring a clean operating environment. |
7017 CD/PA9ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and tilt, resulting in superior system stiffness.
Precision & Load Capacity: Manufactured to PA9A tolerance class with a Moderate preload, this bearing ensures precise shaft positioning and smooth operation under high combined loads. The 15° contact angle effectively handles substantial axial loads in addition to radial loads.
High-Speed Capability: The lightweight and robust phenolic cage is designed for stable operation at high rotational speeds, contributing to a high limiting speed of 28,000 rpm.
Material & Construction: Components made from high-grade chrome steel provide excellent wear resistance and durability, ensuring a long service life under demanding conditions.
7017 CD/PA9ADBC Bearing Typical Application Areas
This high-precision duplex bearing is engineered for advanced machinery where accuracy and rigidity are non-negotiable. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Industrial robots and automated manufacturing systems.
- High-Frequency Motors and Spindles: Applications requiring minimal runout and high rotational accuracy.
- Medical and Laboratory Equipment: Centrifuges and precision instruments.
- Aerospace Actuation Systems: Control surface mechanisms and auxiliary drives.
