71930 ACD/P4ALDT
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71930 ACD/P4ALDT Bearing Product Overview & Core Advantages
The 71930 ACD/P4ALDT is a precision angular contact ball bearing supplied as a duplex tandem (DT) matched set. Engineered for applications demanding exceptional accuracy and rigidity, this bearing is preloaded and manufactured to the stringent P4A tolerance class. Its primary advantage lies in its ability to handle high combined loads, particularly substantial axial loads in one direction, making it an ideal solution for high-speed, high-precision spindles and other critical machinery components.
71930 ACD/P4ALDT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71930 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a duplex (two-bearing) set. |
| P4A | Denotes a high-precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring minimal runout and vibration. |
| L | Signifies the bearing is lubricated from the factory. |
| DT | Specifies the Duplex Tandem arrangement, where two bearings are mounted in series to maximize axial load capacity in one direction. |
71930 ACD/P4ALDT Bearing Structural Features & Performance Benefits
Optimized for High Rigidity and Precision: The duplex tandem arrangement creates an exceptionally rigid bearing system, crucial for minimizing deflection under heavy loads. The bearings are supplied preloaded, eliminating internal clearance for superior rotational accuracy and stiffness from the moment of installation.
Superior Load Capacity: With a 25° contact angle and tandem configuration, this set is engineered to withstand very high axial loads in one direction while also accommodating significant radial loads. The high dynamic and static load ratings ensure long service life under demanding conditions.
High-Speed Performance: The lightweight and robust phenolic resin cage is designed for stability and low friction at high rotational speeds, contributing to the bearing's high limiting speed of 11,000 rpm.
Ready-to-Install: The bearing is pre-lubricated, simplifying installation and ensuring immediate, optimal performance. The open seal type allows for customized lubrication regimes if required by the specific application.
71930 ACD/P4ALDT Bearing Typical Application Areas
The 71930 ACD/P4ALDT is specifically designed for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Frequency Motors: Where low vibration and high rotational accuracy are critical.
- Aerospace and Defense Systems: Actuators and control surface mechanisms requiring reliable, high-load capacity.
