71944 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71944 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71944 ACD/P4ADGB is a metric precision angular contact ball bearing designed for high-performance applications requiring exceptional rotational accuracy and rigidity. This universal matchable bearing belongs to the P4A tolerance class, ensuring ultra-precise dimensions and runout control. Its key advantage lies in its ability to accommodate combined loads (radial and axial) simultaneously, making it ideal for machine tool spindles and other high-speed, high-precision machinery. The light preload (Class B) minimizes deflection under operational forces, enhancing system stability and longevity.
71944 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71944 | Basic bearing series and size designation |
| AC | Angular Contact design with a 25° contact angle |
| D | High internal capacity design |
| P4A | Ultra-high precision tolerance class (exceeding ABEC 7) |
| DGB | Universal Matchable (SU) arrangement designation |
71944 ACD/P4ADGB Bearing Structural Features & Performance Benefits
Optimized Contact Angle & Rigidity: The 25° contact angle is engineered to provide an optimal balance between radial and axial load capacity, delivering superior stiffness for demanding applications.
Precision Construction: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter (220 mm), outside diameter (300 mm), and width (76 mm), ensuring minimal vibration and precise shaft positioning.
High-Speed Capability: The phenolic cage and optimized internal geometry contribute to a high limiting speed of 11,000 rpm, making it suitable for high-speed spindle applications.
Universal Matching Design: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement without selective mounting, simplifying installation and maintaining preload integrity.
Superior Load Ratings: With a dynamic load rating of 76,050 lbf and a static load rating of 128,250 lbf, it offers reliable performance under significant combined loads.
71944 ACD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Gearboxes: Industrial robotics and automation systems
- High-Frequency Motors: Spindle drives and high-performance servomotors
- Aerospace Test Equipment: Precision positioning systems and simulators
- Medical Imaging Devices: CT scanner gantries and MRI systems
