71912 ACB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
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71912 ACB/P4A Bearing Product Overview & Core Advantages
The 71912 ACB/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior running accuracy. Designed to accommodate primarily axial loads in one direction, it features a 25° contact angle for optimal load distribution. Manufactured to P4 (ABEC-7) tolerance class, this bearing ensures exceptional dimensional stability and minimal rotational runout, making it ideal for high-speed spindles and other precision machinery where rigidity and accuracy are paramount. Its compact cross-section and phenolic cage contribute to its high-speed capability.
71912 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing series designation, indicating a high-precision, light-series angular contact bearing. |
| ACB | Specific internal design and contact angle (25°) optimized for high-speed operation and preload capability. |
| P4A | Indicates the tolerance class P4 (ABEC-7) and specific dimensional/geometric accuracy requirements for the bearing's outer ring. |
71912 ACB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: The P4 tolerance class and preload availability ensure minimal deflection and high system rigidity, critical for maintaining accuracy under load.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently handle high axial loads in one direction, while also supporting significant radial loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling stable operation at the high limiting speed of 30,000 rpm. The open design facilitates efficient lubrication and cooling.
- Premium Material Construction: Manufactured from chrome steel for rings and balls, ensuring high durability, wear resistance, and long service life under demanding conditions.
71912 ACB/P4A Bearing Typical Application Areas
The 71912 ACB/P4A is ideally suited for high-performance applications requiring precision and speed, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotics (Articulated arm joints, high-accuracy positioning systems)
- High-Frequency Motors and Spindles
- Medical Equipment (Dental handpieces, laboratory centrifuges)
- Aerospace Actuation Systems
