71926 ACD/P4ADFC
71900 Series Super Precision Angular Contact Ball Bearings
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71926 ACD/P4ADFC Bearing Product Overview & Core Advantages
The 71926 ACD/P4ADFC is a precision angular contact ball bearing designed for demanding applications requiring high rigidity and exceptional running accuracy. This duplex face-to-face (DF) matched set is preloaded to Moderate / Class C, delivering superior system stability and resistance to complex combined loads. Manufactured to a P4A tolerance class, it ensures minimal rotational runout and is ideally suited for high-precision, high-reliability machinery where uncompromising performance is critical.
71926 ACD/P4ADFC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71926 | Basic bearing series and size designation (130mm bore, 180mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a Duplex (two-bearing) matched set. |
| P4A | Specifies the high-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| DF | Denotes the Face-to-Face mounting arrangement of the duplex pair. |
| C | Specifies the Moderate preload level applied to the matched set. |
71926 ACD/P4ADFC Bearing Structural Features & Performance Benefits
High Rigidity & System Stability: The duplex face-to-face (DF) arrangement and moderate preload (Class C) work in concert to create an exceptionally rigid bearing system. This configuration significantly increases resistance to moment loads and deflection, ensuring precise shaft positioning and enhanced machining accuracy.
Superior Load Capacity: With a 25° contact angle and a robust design incorporating 27 balls, this bearing is engineered to handle significant combined radial and axial loads simultaneously. The dynamic and static load ratings of 31,500 lbf and 45,900 lbf, respectively, attest to its durability and longevity in strenuous applications.
Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 7,500 rpm. This makes the bearing an excellent choice for high-speed spindles and other rapid-rotation equipment.
Precision & Reliability: Conforming to the P4A tolerance class with tight dimensional controls on bore, outside diameter, and width, this bearing guarantees smooth, quiet, and vibration-free operation, which is paramount for achieving superior surface finishes and operational consistency.
71926 ACD/P4ADFC Bearing Typical Application Areas
The 71926 ACD/P4ADFC is ideally deployed in high-performance machinery where precision, speed, and rigidity are non-negotiable. Key application areas include:
- Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- High-Frequency Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Rotary Joints
