71801 ACDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71801 ACDGA/P4 Bearing Product Overview & Core Advantages
The 71801 ACDGA/P4 is a super-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Manufactured to P4 tolerance class, this bearing features a 25° contact angle and an Extra Light (A) preload, making it ideal for high-speed spindles and precision machinery. Its compact design, with a 12 mm bore and 5 mm width, provides a high-performance solution in a minimal footprint. The bearing is universally matchable (SU), allowing for precise axial play adjustment when mounted in sets, and comes pre-lubricated for immediate operation.
71801 ACDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71801 | Basic bearing series and size designation | Indicates a metric, super-precision bearing with a 12mm bore. |
| AC | Angular Contact | Designed to support combined radial and axial loads. |
| D | Duplex Bearing | A single bearing ground for universal matching in sets. |
| GA | Preload Class: Extra Light (A) | Provides minimal starting friction and is optimized for very high speeds. |
| /P4 | Tolerance Class P4 | Denotes extremely tight dimensional and running accuracy, superior to ABEC 7. |
71801 ACDGA/P4 Bearing Structural Features & Performance Benefits
The performance of the 71801 ACDGA/P4 is a direct result of its advanced construction. The 25° contact angle is optimized to handle significant axial loads in one direction while supporting radial loads. The phenolic resin cage is lightweight and robust, contributing to smooth operation and reduced centrifugal force at the limiting speed of 100,000 rpm. Being manufactured to P4 precision tolerances ensures minimal runout and vibration, which is critical for achieving high surface finishes in machining and precise positioning. The extra light preload (GA) eliminates internal clearance, resulting in superior stiffness and rotational accuracy from start-up, which is essential for applications sensitive to deflection under load.
71801 ACDGA/P4 Bearing Typical Application Areas
This bearing is engineered for the most demanding precision applications, including:
- High-Frequency Machine Tool Spindles for milling, grinding, and drilling
- Precision Robotics and automated assembly arms
- High-speed spindles in PCB drilling and routing machines
- Rotary assemblies in optical and measuring instruments
- Axial compressors and other high-speed machinery requiring universal matching
