727 ACD/P4A
Miniature Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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727 ACD/P4A Bearing Product Overview & Core Advantages
The 727 ACD/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Designed to accommodate combined loads, it efficiently handles significant axial loads in one direction alongside radial loads. Its P4 (ABEC-7) super-precision tolerance and availability with preload make it an ideal solution for machine tool spindles and other high-performance machinery where minimal runout and high-speed operation are critical.
727 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 727 ACD | Denotes the basic bearing series with a 25° contact angle. |
| P4A | Indicates the tolerance class P4 (ABEC-7) and that the bearing is supplied with a specific preload for immediate high-rigidity performance. |
727 ACD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The single-row design with a 25° contact angle is optimized for high rigidity and precise axial positioning. Manufactured to P4 tolerance class, it ensures extremely tight dimensional and running accuracy, minimizing vibration and supporting superior machining finishes.
Optimized for High-Speed Operation: The lightweight phenolic resin cage provides excellent guidance and stability at the limiting speed of 110,000 rpm, reducing centrifugal forces and friction for cooler, more efficient running.
Superior Load Capacity: The high-grade chrome steel construction for both rings and balls, combined with the angular contact design, provides a high dynamic load rating of 655 lbf, ensuring long service life under demanding conditions.
727 ACD/P4A Bearing Typical Application Areas
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotic Drives
- High-Frequency Motors and Spindles
- Medical and Dental Equipment
- Aerospace Instrumentation
