How to Solder Fine Wire

Use solder for small wire and connections.

Having the right tools makes any project go smoother, and soldering is no exception. The key is to have the right amount of heat so that solder does not cool before a good connection is made, or one that is too hot and heats the resin out before the solder can form a good connection. A small tipped soldering iron of about 45 watts and solder for small wire and connections are the recommended tools for a small job.

Things You'll Need

• Wire cutters/strippers
• Soldering iron
• 1/4-inch soldering tip
• Roll of solder - 63 percent tin, 37 percent lead
• Needle-nose pliers

Instructions

1. Plug the soldering iron into the outlet and allow to heat for 5 to 10 minutes.

2. Strip about 1 inch of insulation off of one end, of each of the two wires, to be soldered together.

3. Apply a small amount of solder to each end of the wire to "tin" them. Use the heated soldering iron to melt a very small amount to solder to each wire. Tinning the wire will help the ends be stronger and the individual strands of the wire to remain together as one wire. Apply only enough solder to cover the wire or put a glaze over the wire. Allow the wires to cool.

4. Twist the two ends of the wires together in a clockwise directions, using the pliers. Twist the wires evenly together to form a smooth joint.

5. Apply solder to the joint in a slow and even pace. Apply the solder over the wire, heating it with the iron until there is enough to cover the wires, but you can still see the strands of the wire. Be careful to not overheat the wire and melt any of the wires' insulation.

6. Tug gently on the connection/joint of the wire to ensure a good, solid extension exists. Unplug the soldering iron and allow it to cool.

Tips & Warnings

• Use a small tip on the soldering iron to help control the amount of solder applied to the small wires.

• Always solder in a well-ventilated area, as some types of solder contain lead.

• Avoid contact with the metal tip of the soldering iron as this can be very hot and cause burns.

References

• How to Make Perfect Solder Joints

Resources

• How to Solder Wires