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!

How to Crimp Micro Coaxial Cable Connectors: A Step-by-Step Guide - Micro Coaxial Cable factory-(FRS)

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