71944 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71944 ACD/P4A Bearing Product Overview & Core Advantages
The 71944 ACD/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 (ABEC-7) tolerance class, this bearing excels in handling combined radial and axial loads simultaneously. Its optimized 25° contact angle provides superior axial load capacity and stiffness, making it an ideal choice for machine tool spindles and other high-speed, high-rigidity machinery. The bearing is pre-lubricated and features an open design for controlled lubrication management in sophisticated systems.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71944 | Basic bearing series designation |
| ACD | Angular Contact design with a 25° contact angle and optimized internal geometry |
| P4A | Indicates P4 (ABEC-7) tolerance class with specific running accuracy requirements |
71944 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row angular contact design with a 25° contact angle provides excellent axial rigidity and running accuracy, essential for maintaining precision in demanding applications.
- Superior Load Capacity: Engineered to handle significant combined radial and axial loads, with a dynamic load rating of 46,800 lbf and static load rating of 64,125 lbf.
- High-Speed Performance: The phenolic resin cage ensures stable operation at high speeds, supporting a limiting speed of 5,600 rpm with minimal friction.
- Precision Engineering: Manufactured to P4 tolerance class with tight dimensional control on bore, outside diameter, and width for consistent high-performance operation.
- Optimized Internal Geometry: Features 29 chrome steel balls with a diameter of 25.4 mm, providing optimal load distribution and smooth operation.
71944 ACD/P4A Bearing Typical Application Areas
The 71944 ACD/P4A precision angular contact bearing is specifically engineered for high-performance applications including:
- Machine Tool Spindles - High-speed machining centers and grinding spindles
- Precision Gearboxes - Industrial transmission systems requiring high accuracy
- Aerospace Components - Aircraft systems and auxiliary power units
- Medical Equipment - High-speed dental handpieces and surgical tools
- Robotics & Automation - Precision robotic joints and positioning systems
