71901 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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71901 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 71901 ACD/P4ADBC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement provides superior high rigidity and moment load capacity, making it ideal for spindle applications. Preloaded to Moderate / Class C, this matched pair offers consistent performance, handles combined loads efficiently, and is optimized for high-speed operation up to 140,000 rpm. Manufactured to a P4A tolerance class, it ensures outstanding running accuracy for high-performance machinery.
71901 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing series, indicating a high-precision angular contact design with a 12mm bore. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex Back-to-Back (DB) matched arrangement. |
| P4A | Tolerance class denoting very high running accuracy (equivalent to ABEC 7). |
| DBC | Specific internal design code for this preloaded, matched set. |
71901 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Moment Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional stability under heavy combined loads.
- Optimized for High Speeds: The lightweight phenolic cage minimizes centrifugal forces, while the 25° contact angle provides an excellent balance between radial and axial load capacity, contributing to the high limiting speed of 140,000 rpm.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, this bearing guarantees smooth, quiet, and vibration-free operation essential for precision applications.
- Preload & Matched Set: Supplied as a preloaded pair (Moderate / Class C), these bearings are ready for installation without further adjustment, providing immediate and consistent high rigidity and rotational accuracy.
71901 ACD/P4ADBC Bearing Typical Application Areas
This high-precision duplex bearing is engineered for applications where accuracy, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Instruments and measuring equipment
- High-Frequency Motors and servo drives
- Robotic Arm Joints and precision gearboxes
