71928 ACDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71928 ACDGC/P4A Bearing Product Overview & Core Advantages
The 71928 ACDGC/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to accommodate combined loads (radial and axial loads simultaneously), this bearing features a 25° contact angle and a Moderate (Class C) preload for enhanced system stiffness and precise shaft positioning. Manufactured to the stringent P4A tolerance class, it guarantees minimal runout and superior performance in high-speed, high-accuracy environments. Its Universal Matchable (SU) designation allows for flexible mounting in various preloaded arrangements, making it a versatile and reliable component for critical machinery.
71928 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| GC | Indicates a specific internal clearance and preload combination for Moderate (Class C) preload. |
| P4A | Denotes an ultra-high precision tolerance class exceeding ABEC 7, ensuring minimal dimensional and running accuracy deviations. |
71928 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row angular contact design combined with a Moderate preload provides high axial and radial rigidity, minimizing deflection under load and ensuring precise shaft guidance. The P4A tolerance class guarantees exceptional running accuracy.
- Superior Load Capacity: Optimized for combined loads, the 25° contact angle efficiently handles significant axial loads in one direction alongside radial loads.
- High-Speed Capability: The lightweight, durable phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to a high limiting speed of 11,000 rpm. The bearing is supplied lubricated for immediate operation.
- Material and Construction: Manufactured from high-grade chrome steel for rings and balls, the bearing offers high fatigue life and wear resistance, suitable for a temperature range of -30°C to 110°C.
71928 ACDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Speed Spindles for PCB drilling and routing
- Precision Gearboxes and Drive Systems
- Industrial Pumps and Compressors
- Robotic Arms and Precision Automation Equipment
