CNC Machining
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CNC Machining

CNC machining plays a vital role in the manufacturing of RF interconnects, particularly in crafting precision components like RF connectors, adapters and housings. CNC (Computer Numerical Control) machining is used to precisely fabricate metallic and dielectric parts of RF interconnects with tight tolerances, typically in the range of ±0.001 or better.
These tight tolerances are crucial for ensuring impedance matching (usually 50 or 75 ohms), low insertion and return loss, as well as reliable mechanical fits under vibration or thermal stress. The connector bodies are machined from metals like brass, stainless steel, aluminum and beryllium copper.

CNC Processes Involved

cnc machining main

The CNC turns and mills external threads (for SMA, TNC, N-type, etc.), hex flats for wrenching, and internal seats for dielectric inserts and center contacts. The CNC machine also makes dielectric supports, which some high-performance interconnects use machined PTFE or other plastics to maintain the center conductor's position and impedance. Amphenol RF also makes center contacts (male/female pins), which are CNC-machined for ultra-fine tolerances.

cnc turning

CNC Turning (Lathe Work)

  • Used to make round parts like connector bodies and contact pins.
  • Threads (internal and external), chamfers and precise diameters are turned here.

cnc milling

CNC Milling

  • Used for flat surfaces, slots, connector flanges and waveguide blocks.
  • Also used to create keyed or anti-rotation features.

drilling

Drilling & Tapping 

  • Precision holes for contact alignment, mounting or locking screws

Why CNC Is Critical for RF Interconnects?

CNC machining is critical for RF interconnects because it delivers the high precision required to maintain exacting dimensional tolerances essential for consistent impedance, minimal signal loss and optimal high-frequency performance. Its repeatability ensures uniformity across large production batches, which is vital for reliability in mission-critical applications like aerospace and defense. CNC also enables rapid prototyping and customization, allowing engineers to develop and test new connector designs quickly. Additionally, it provides excellent surface finish quality, reducing internal signal reflections and enhancing overall RF efficiency.

Amphenol RF CNC Machining Facilities

We have CNC machining capabilities in Shenzhen and Nogales, with operations coming soon to Vietnam. Our Danbury facility is also equipped with machining capabilities.

View Career Openings for CNC machine programmers and operators

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