71901 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71901 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71901 ACD/P4ADGB is a precision angular contact ball bearing manufactured to super-precision P4A tolerance class. Engineered for applications demanding exceptional rotational accuracy and high-speed performance, this bearing is characterized by its 25° contact angle and Universal Matchable (SU) design, allowing two bearings to be precisely paired for optimal performance. Its light preload (Class B) ensures minimal friction and smooth operation, making it an ideal solution for high-rigidity, high-speed spindles and precision machinery where reliability is paramount.
71901 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing series and size designation (12mm bore, 24mm OD, 12mm width) |
| AC | Angular Contact design with a 25° contact angle |
| D | High contact angle for increased axial load capacity |
| P4A | Super-precision tolerance class for exceptional running accuracy |
| DGB | Universal Matchable (SU) designation, indicating the bearing is supplied as one of a matched pair |
71901 ACD/P4ADGB Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of a phenolic resin cage and optimized internal geometry enables a high limiting speed of 140,000 rpm, making it suitable for demanding high-speed applications.
Superior Rigidity and Load Capacity: The 25° contact angle provides excellent resistance to combined loads, offering high axial and radial load capacity from a single bearing position. The Universal Matchable (SU) pairing of two bearings further enhances system rigidity and moment load capacity.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring predictable performance and precise fit in high-accuracy assemblies.
Optimized Material Selection: Constructed from chrome steel for both rings and balls, providing high durability and fatigue resistance. The phenolic cage offers low weight and excellent performance at high speeds.
71901 ACD/P4ADGB Bearing Typical Application Areas
The 71901 ACD/P4ADGB is ideally suited for high-performance applications requiring precision and speed, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Instrumentation
- High-Frequency Spindles
- Robotic Drives and Actuators
- Medical and Dental Equipment
