7217 ACD/P4ADGA
7200 & 7300 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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7217 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 7217 ACD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a universal matchable (SU) bearing supplied in a set of two, it is engineered to accommodate combined loads—significant radial and axial loads in both directions—simultaneously. Its P4A tolerance class ensures ultra-precision operation, making it ideal for high-speed spindles and other critical machinery where high rigidity and minimal runout are paramount. The phenolic cage and optimized 25° contact angle contribute to its superior high-speed performance and operational stability.
7217 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class with enhanced running accuracy requirements. |
| DGA | Universal Matchable (SU) bearing set. The "GA" suffix denotes a specific preload group for universal matching. |
7217 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and the use of a matched pair (universal matchable) create a rigid bearing system capable of handling high combined radial and axial loads from both directions.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class for exceptional dimensional and running accuracy. The lightweight phenolic resin cage is ideal for high-speed applications, contributing to a limiting speed of 17,000 rpm with reduced centrifugal forces and friction.
- Optimized Internal Geometry: Features a 25° contact angle, which provides an excellent balance between axial load capacity and radial load capacity, suitable for complex load conditions.
- Durability & Reliability: Constructed from chrome steel for both rings and balls, ensuring high fatigue life and wear resistance in demanding operational environments.
7217 ACD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Aerospace and Defense Positioning Systems
