71901 ACEGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71901 ACEGC/P4A Bearing Product Overview & Core Advantages
The 71901 ACEGC/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing in a universally matchable (SU) set, it is engineered to accommodate combined loads, primarily thrust loads in one direction, with a 25° contact angle optimizing this capability. Its defining features include a P4A tolerance class for superior running accuracy, a moderate preload (Class C) for enhanced system rigidity, and a phenolic cage enabling high limiting speeds. This bearing is pre-lubricated and operates within a wide temperature range, making it an ideal solution for high-reliability, precision machinery.
71901 ACEGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing series and size designation (12mm bore, 24mm OD, 6mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| EG | Designates a Moderate Preload (Class C). |
| C | Indicates a Phenolic Resin Cage, suitable for high speeds. |
| /P4A | Specifies the super-precision tolerance class, exceeding ABEC 7 standards for exceptional running accuracy. |
71901 ACEGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and System Stability: The moderate preload (Class C) eliminates internal clearance, resulting in significantly increased stiffness. This minimizes shaft deflection under load, which is critical for maintaining precision in machining and positioning applications.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently support high axial loads in one direction while also accommodating substantial radial loads. This makes it ideal for applications with combined loading conditions.
- Superior High-Speed Performance: The lightweight phenolic resin cage (C) ensures excellent dimensional stability and low friction at high rotational speeds, directly contributing to the high limiting speed of 140,000 rpm. The open design facilitates efficient lubrication and cooling.
- Precision and Accuracy: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, ensuring smooth, quiet operation and superior positional accuracy in the final application.
71901 ACEGC/P4A Bearing Typical Application Areas
- High-Frequency Spindles for PCB drilling and precision machining
- Precision Grinding Spindles
- High-Speed Machine Tool Axes
- Medical and Dental Handpieces
- Optical Scanners and Encoders
- Aerospace Instrumentation
