71940 ACDGC/P4A
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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71940 ACDGC/P4A Bearing Product Overview & Core Advantages
The 71940 ACDGC/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a single bearing with a 25° contact angle and Moderate (Class C) preload, it is engineered to support combined loads—handling significant radial loads and axial loads in one direction simultaneously. Its P4A tolerance class ensures ultra-precise running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and high system rigidity are critical. The universal matching (SU) design allows for flexible arrangement in sets, providing engineers with versatile mounting solutions.
71940 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71940 | Basic bearing series and size designation |
| AC | Angular Contact design with a 25° contact angle |
| D | High internal design optimized for performance |
| GC | Specific internal clearance and preload group (Moderate / Class C preload) |
| P4A | Ultra-precision tolerance class, exceeding ABEC 7/ISO P4 standards for enhanced running accuracy |
71940 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with a 25° contact angle and Moderate preload provides superior stiffness, enabling the bearing to effectively handle combined radial and axial loads. With a dynamic load rating of 44,775 lbf and a static load rating of 56,250 lbf, it offers reliable performance under heavy-duty conditions.
- High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 6,300 rpm. This makes it suitable for high-speed applications like machine tool spindles.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, this bearing ensures minimal vibration and precise shaft positioning.
- Material Quality: Components made from chrome steel for both rings and balls provide high hardness, wear resistance, and long service life.
- Operational Versatility: The open seal design allows for customized lubrication regimes, while the specified temperature range of -30°C to 110°C ensures stable operation in various environments.
71940 ACDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- High-Speed Machining Centers
- Precision Gearboxes
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Rotary Axes
