71928 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71928 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71928 ACD/P4ADGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-loaded pair, it delivers optimized performance in combined load scenarios, simultaneously handling significant radial and axial loads. Manufactured to P4A tolerance class with a light preload (Class B), this bearing is engineered for high-speed operation and superior running accuracy in precision machinery and spindle systems.
71928 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71928 | Basic bearing series, indicating a high-precision angular contact design with a 140mm bore. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a universal matchable (SU) bearing, allowing for flexible mounting arrangements in pairs. |
| P4A | Denotes an ultra-high precision tolerance class, exceeding ABEC 7 standards, for minimal runout and vibration. |
| DGB | Indicates a light preload (Class B) is applied, enhancing system rigidity and rotational accuracy. |
71928 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with a 25° contact angle and universal matching capability enables the bearing pair to withstand substantial combined radial and axial loads from both directions, providing exceptional system stability.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing achieves superior running accuracy and is optimized for high-speed applications up to 11,000 rpm, offering low friction and excellent acceleration characteristics.
- Optimized Internal Geometry: Featuring 29 precision balls of 15.875 mm diameter made from chrome steel, the bearing ensures smooth operation and a high dynamic load rating of 32,850 lbf.
- Pre-loaded & Ready-to-Mount: Supplied as a matched set of 2 bearings with a light preload applied, the unit ensures consistent performance, simplifies installation, and eliminates the need for complex preload adjustment.
71928 ACD/P4ADGB Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications requiring extreme accuracy and speed, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and high-frequency motor spindles.
- Industrial Pumps & Compressors: Where reliability and high-speed capability are critical.
- Robotics & Automation: High-accuracy rotary joints and arm actuators.
