71956 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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71956 ACD/P4A Bearing Product Overview & Core Advantages
The 71956 ACD/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to P4 (ABEC-7) tolerance class, this bearing is optimized to handle significant combined loads, particularly thrust loads in one direction, making it ideal for demanding machine tool spindles and other precision machinery. Its phenolic cage and preload availability contribute to superior high-speed performance and operational stability.
71956 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | 25° contact angle design optimized for high axial load capacity and rigidity |
| P4A | P4 (ABEC-7) precision tolerance class with specific dimensional and running accuracy requirements |
71956 ACD/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4 tolerance class with precise bearing dimensions (280mm bore, 380mm OD) ensuring minimal runout and vibration. The 25° contact angle provides optimal stiffness for applications requiring precise positioning.
Superior Load Capacity: With a radial dynamic load rating of 62,100 lbf and radial static load rating of 96,750 lbf, this bearing delivers reliable performance under substantial combined radial and axial loads.
High-Speed Capability: The phenolic cage material enables smooth operation at limiting speeds up to 4,000 rpm, reducing friction and heat generation in high-speed applications.
Precision Engineering: Featuring 31 chrome steel balls with precise diameter control (30.162mm) for consistent load distribution and extended service life.
71956 ACD/P4A Bearing Typical Application Areas
- Machine tool spindles and high-precision machining centers
- Precision grinding machines and milling equipment
- High-speed machining applications requiring P4 accuracy
- Industrial robotics and automation systems
- Aerospace positioning systems and precision instruments
