71964 ACDMA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71964 ACDMA/P4A Bearing Product Overview & Core Advantages
The 71964 ACDMA/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior rigidity. Engineered to a P4 (ABEC-7) tolerance class, it excels in handling significant combined loads, including high radial loads and unidirectional axial loads. Its 25° contact angle and optimized internal geometry contribute to its high load-carrying capacity and stable operation. This bearing is preloaded, ensuring minimal axial and radial play for enhanced system stiffness and positional accuracy in demanding machinery.
71964 ACDMA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71964 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| DM | Matched bearing set designation (Duplex). This single bearing is configured for a specific preload when mounted with a counterpart. |
| A | Signifies a specific contact angle and internal design for high axial load capacity. |
| P4 | High-Precision Tolerance Class (equivalent to ABEC-7), ensuring extremely tight dimensional and running accuracy. |
71964 ACDMA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4 precision standards with a phenolic resin cage, this bearing offers exceptional dimensional stability and low vibration, which is critical for high-speed and high-accuracy applications. The phenolic cage contributes to smoother operation at high speeds and is suitable for a wide operating temperature range.
Superior Load Capacity: The 25° contact angle and robust construction using chrome steel for both rings and balls enable it to handle high dynamic and static loads (78975 lbf dynamic, 131625 lbf static). It is ideally suited for applications with significant combined radial and axial loads.
Optimized for High-Speed Operation: The lightweight phenolic cage and precision-ground components allow for a high limiting speed of 3,600 rpm, making it a reliable choice for high-speed spindles and machinery.
Preload & Matched Arrangement: Supplied as a preloaded and matched (duplex) single bearing, it ensures immediate high system stiffness and rotational accuracy upon installation, reducing setup time and complexity.
71964 ACDMA/P4A Bearing Typical Application Areas
The 71964 ACDMA/P4A is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Industrial gearboxes requiring high accuracy and load capacity.
- High-Frequency Motors and Spindles: Applications in aerospace and advanced manufacturing.
- Robotics and Automation: High-precision rotary joints and arm actuators.
