7217 CD/P4ADGB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7217 CD/P4ADGB Bearing Product Overview & Core Advantages
The 7217 CD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-loaded pair, it is engineered to handle combined loads—simultaneous radial and axial forces—with high reliability. Its P4A tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and vibration are critical. The phenolic cage and optimized internal geometry contribute to its high-speed capability and smooth operation.
7217 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7217 | Basic bearing series, indicating a 85 mm bore, 150 mm OD, and 56 mm width. |
| CD | Specifies a universal matchable (SU) bearing pair with a 15° contact angle, designed to be mounted in either a DB (back-to-back) or DF (face-to-face) arrangement. |
| P4A | Indicates a high-precision tolerance class with enhanced dimensional and running accuracy requirements. |
| DGB | Signifies a light preload (Class B) applied to the matched set, providing optimal stiffness and minimizing axial and radial play for precise shaft positioning. |
7217 CD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The universal matchable pair (SU) configuration creates a highly rigid bearing system capable of supporting significant combined loads from any direction. The 15° contact angle is optimized for sustaining substantial axial loads in addition to radial forces.
High-Speed Performance: The lightweight phenolic cage ensures excellent dimensional stability and low friction at high rotational speeds, contributing to the bearing's limiting speed of 17,000 rpm. The open design allows for efficient lubrication management.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing guarantees minimal vibration and superior running accuracy in demanding applications.
7217 CD/P4ADGB Bearing Typical Application Areas
The 7217 CD/P4ADGB is ideally suited for high-performance machinery where precision and speed are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems.
- High-Frequency Motors and Spindles: Applications requiring minimal runout and high rotational accuracy.
- Industrial Pumps and Compressors: For robust performance under combined loading conditions.
