71944 ACDGA/P4AL
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71944 ACDGA/P4AL Bearing Product Overview & Core Advantages
The 71944 ACDGA/P4AL is a super-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. Operating under P4A tolerance class, it delivers superior running performance. Its defining characteristic is the ability to accommodate combined loads—simultaneously handling significant radial and axial loads in one direction. The 25° contact angle is optimized for high axial load capacity. This bearing comes pre-lubricated and is part of a Universal Matchable (SU) set, allowing for precise preload configuration when mounted with other bearings from the same set, making it ideal for high-precision, high-rigidity spindles.
Model Code Breakdown
- 71944: Basic bearing series number, indicating a light series, 220mm bore, 300mm OD angular contact bearing.
- AC: Angular Contact design.
- D: High contact angle (25° in this specification).
- GA: Indicates a specific internal clearance and preload level (Extra light / Class A).
- P4A: Denotes a super-precision tolerance class exceeding standard ABEC 7 (P4) levels, ensuring minimal runout and vibration.
- L: Signifies the bearing is pre-lubricated with grease.
71944 ACDGA/P4AL Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The single-row design, combined with a 25° contact angle and a phenolic resin cage, provides excellent stability and high resistance to deflection under complex loading conditions. With a dynamic load rating of 46,800 lbf and a static load rating of 64,125 lbf, it reliably handles demanding combined loads.
High-Speed Performance: The lightweight and robust phenolic cage is crucial for high-speed operation, reducing centrifugal forces and friction. This contributes to the bearing's high limiting speed of 11,000 rpm.
Precision and Stability: Manufactured to P4A super-precision standards with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees minimal runout and superior positional accuracy in the application.
Universal Matching: As part of a Universal Matchable (SU) set, these bearings can be universally paired with others from the same manufacturing lot to achieve a specific preload without selective mounting, simplifying assembly and ensuring consistent performance.
71944 ACDGA/P4AL Bearing Typical Application Areas
The 71944 ACDGA/P4AL is predominantly used in high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Aerospace Positioning Systems
- Medical and Dental Equipment Spindles
