71930 ACD/P4ADGA
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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71930 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71930 ACD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. This universal matchable (SU) bearing features an extra light preload (Class A) and P4A tolerance class, making it ideal for high-speed spindle applications. Its 25° contact angle provides superior combined load capacity, effectively handling both radial and axial loads simultaneously. The open design with phenolic cage enables high-speed operation up to 11,000 rpm, while the chrome steel construction ensures high rigidity and long service life in demanding industrial environments.
71930 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Advantage |
|---|---|---|
| ACD | 25° Contact Angle, Universal Matchable Design | Optimized for combined radial and axial loads, interchangeable mounting |
| P4A | High Precision Tolerance Class | Superior running accuracy for precision applications |
| DGA | Extra Light Preload (Class A) | Minimal friction, ideal for high-speed applications |
71930 ACD/P4ADGA Bearing Structural Features & Performance Benefits
High Precision Construction: The P4A tolerance class ensures exceptional dimensional accuracy and running precision, critical for applications requiring minimal vibration and noise.
Optimized Load Distribution: With a 25° contact angle and 23 chrome steel balls of 19.05 mm diameter, this bearing delivers superior combined load capacity (40,050 lbf dynamic / 56,250 lbf static) while maintaining high rigidity.
High-Speed Performance: The phenolic cage and optimized internal geometry enable high-speed operation up to 11,000 rpm, making it suitable for demanding spindle applications.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be mounted in various configurations (back-to-back, face-to-face, or tandem) without performance degradation.
Premium Material Selection: Constructed from chrome steel for both rings and balls, ensuring excellent wear resistance and durability across a wide temperature range (-30°C to 110°C).
71930 ACD/P4ADGA Bearing Typical Application Areas
Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling machines requiring exceptional accuracy and high-speed capability.
Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus where vibration-free operation is critical.
High-Speed Motors: Electric motors and generators operating at elevated speeds with demanding rigidity requirements.
Aerospace Components: Flight control systems, auxiliary power units, and other aerospace applications requiring precision bearings with reliable performance.
Medical Equipment: High-speed dental handpieces, surgical tools, and diagnostic imaging systems where precision and reliability are paramount.
