Micro Coaxial Cable factory

How to Crimp Micro Coaxial Cable Connectors: A Step-by-Step Guide

Crimping micro coaxial connectors (like MMCX, MCX, or SMP) is essential for reliable signals in devices such as Wi-Fi routers, drones, GPS units, and smartphones. Proper crimping ensures strong connections without signal loss. Follow these steps for success:

What You’ll Need:

• Micro coaxial cable (e.g., RG178, RG316)
• Micro coaxial connectors (match the cable type)
• ​Crimping tool (specifically for micro connectors – critical!)
• Wire stripper (precision type for micro cables)
• Coaxial cable prep tool or razor blade
• Magnifying glass or bright light
• Multimeter (for testing)

Step 1: Prepare the Cable

• Strip ¼ inch (6mm) of the cable’s outer jacket using a precision stripper. ​Avoid nicking the shield braid!
• Gently fold back the braided shield over the jacket like a cuff. Keep it neat and untangled.
• Strip ⅛ inch (3mm) of the inner dielectric to expose the center conductor. Trim any frayed shield wires.

Step 2: Prepare the Connector

• Slide the connector’s crimp ferrule onto the cable before assembly.
• Insert the center conductor into the connector pin until it seats fully. If soldering is required (check connector type), apply a tiny amount of solder sparingly.

Step 3: Crimp the Center Conductor

• Place the connector’s contact pin into the ​inner crimp slot of your tool.
• Squeeze firmly until the tool stops. Ensure the conductor is secure and centered.

Step 4: Crimp the Outer Shield

• Slide the ferrule against the folded-back shield.
• Place the ferrule into the ​outer crimp slot of your tool.
• Squeeze evenly until fully crimped. The ferrule should compress smoothly without crushing the dielectric.

Step 5: Final Assembly & Testing

• Slide any remaining connector parts (like housings) into place until they click.
• ​Test with a multimeter:
  • Check continuity between center pins (should be near 0Ω).
  • Verify no continuity between center pin and shield (should be infinite resistance).
• Perform a tug test to ensure no wires slip.

Key Tips to Avoid Failure:

• ​Tool choice is critical: Generic crimpers won’t work. Use a micro-crimp tool (e.g., from IWISS or Engineer).
• ​Stripping precision: Nicked braids cause shorts. Use high-quality strippers or practice with scrap cable.
• ​Braiding: Keep the shield folded cleanly. Trim any loose strands.
• ​Inspect connections: Use magnification to check for stray wires or poor crimps.
• ​Practice first: Use spare connectors/cables until confident.

Always prioritize safety: Disconnect devices from power before crimping, and wear eye protection against wire fragments. With practice, you’ll master clean crimps for strong, low-loss connections!