71830 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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71830 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71830 ACD/P4DGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a universally matchable (SU) bearing supplied in a pre-lubricated, matched pair of two, it is engineered to accommodate combined loads (radial and axial) efficiently. Its defining characteristics include an Extra light (Class A) preload and a P4 tolerance class, making it an ideal choice for high-rigidity, high-precision spindles and other critical machinery where rotational accuracy and stability are paramount.
71830 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71830 | Basic bearing designation, indicating the bearing size (150mm bore, 190mm OD, 40mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates the bearing is supplied as a universally matchable (SU) pair of two bearings. |
| P4 | Specifies the tolerance class, denoting high-precision manufacturing standards for superior running accuracy. |
| DGA | Indicates the bearing is pre-lubricated (Lubricated) and comes with an Extra light preload (Class A). |
71830 ACD/P4DGA Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The combination of a 25° contact angle and Class A preload ensures high system rigidity and minimizes axial and radial runout, which is critical for precision applications. Manufactured to P4 tolerance, it guarantees exceptional dimensional and running accuracy.
Optimized for High Speeds: The phenolic cage is lightweight and possesses excellent sliding properties, contributing to lower friction and enabling a high limiting speed of 11,000 rpm. This makes it a true high-speed bearing.
Superior Load Capacity: The angular contact design allows the bearing to handle significant combined loads. With a dynamic load rating of 17,842 lbf and a static load rating of 30,825 lbf, it offers reliable performance under demanding conditions.
Universal Matchability (SU): Supplied as a universally matchable pair, these bearings can be mounted in tandem, back-to-back, or face-to-face arrangements without the need for selective assembly, simplifying installation and ensuring optimal performance.
71830 ACD/P4DGA Bearing Typical Application Areas
The 71830 ACD/P4DGA is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, semiconductor manufacturing, and other precision machining.
- High-Frequency Motors and Spindles: Where high rotational speed and accuracy are required.
- Robotics and Automation: High-accuracy rotary joints and axes.
