71917 ACD/P4ADGD
71900 Series Super Precision Angular Contact Ball Bearings
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71917 ACD/P4ADGD Bearing Product Overview & Core Advantages
The 71917 ACD/P4ADGD is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. Engineered as a universal matchable (SU) bearing, it can be paired with another identical bearing to form a preloaded duplex set, delivering superior performance under combined radial and axial loads. Manufactured to the exacting P4A tolerance class and featuring a heavy preload (Class D), this bearing is ideal for high-speed, high-precision spindles and other critical machinery where maximum stiffness and rotational accuracy are paramount.
71917 ACD/P4ADGD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71917 | Basic bearing series and size designation (85mm bore, 120mm OD, 36mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a heavy preload (Class D) for maximum system rigidity. |
| /P4A | Indicates high precision tolerance class P4A, exceeding ABEC 7 standards. |
| DGD | Designates the bearing as Universal Matchable (SU) in a DB (back-to-back) or DF (face-to-face) arrangement. |
71917 ACD/P4ADGD Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design and heavy preload work in concert to provide exceptional stiffness, effectively resisting deflection under complex combined loads. This ensures precise positioning and minimal runout in demanding applications.
Precision & High-Speed Performance: Built to P4A tolerance class with a phenolic resin cage, this bearing achieves superior running accuracy and smooth operation. The optimized internal geometry and cage design contribute to its high limiting speed of 28,000 rpm.
Universal Matchability: As an SU-type bearing, two 71917 ACD/P4ADGD units can be universally matched to create a preloaded set without selective mounting, simplifying installation and ensuring optimal performance.
Durable Construction: Manufactured from high-grade chrome steel for both rings and balls, the bearing offers high fatigue life and durability under heavy loads.
71917 ACD/P4ADGD Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems.
- High-Frequency Motors & Spindles: Applications requiring minimal vibration and high rotational accuracy.
- Medical & Dental Equipment: High-speed handpieces and scanners.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
