71919 ACDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71919 ACDGC/P4A Bearing Product Overview & Core Advantages
The 71919 ACDGC/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and exceptional rotational accuracy. Operating under a moderate preload (Class C), this bearing is designed to primarily accommodate high axial loads in one direction while simultaneously handling significant radial loads. Its P4A tolerance class ensures superior dimensional and running accuracy, making it an ideal choice for high-speed spindles and other precision machinery where minimal runout and vibration are critical. The phenolic cage and optimized 25° contact angle contribute to its outstanding high-speed performance and operational stability.
71919 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71919 | Basic bearing series and size designation (95mm bore, 130mm OD, 18mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | High ball count and optimized internal geometry for increased load capacity. |
| GC | Specific internal clearance group and preload level (Moderate / Class C). |
| P4A | Super Precision tolerance class, exceeding ABEC 7/ISO P4 standards for enhanced running accuracy. |
71919 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4A tolerance class with a moderate preload, this bearing delivers exceptional running accuracy and system rigidity, effectively minimizing deflection under load.
- Superior Load Capacity: The 25° contact angle and high ball count (28 balls) enable it to handle significant combined loads, with a high thrust capacity in one direction.
- Optimized High-Speed Performance: The lightweight phenolic resin cage ensures low centrifugal forces and excellent guidance, contributing to a high limiting speed of 16,000 rpm. The open design facilitates efficient lubrication and cooling.
- Universal Matching Capability (SU): This bearing is Universal Matchable, allowing for precise bearing arrangements (e.g., duplex pairs in back-to-back or face-to-face configurations) to achieve specific preload and stiffness requirements without selective mounting.
71919 ACDGC/P4A Bearing Typical Application Areas
The 71919 ACDGC/P4A is specifically designed for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational accuracy are paramount.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and other precision instruments.
