Pencil Welding

Miniature welding of metal conductors or small-sized parts can be done with a simple rod made from a simple pencil. A mini welding machine with a graphite rod is possible not only to weld, but to cut metals of small thickness. How to apply it and for what, I think, you decide.

You will need

  • Step-down transformer.
  • Simple pencil.
  • Wires.
  • Clamp, such as a crocodile.


A miniature welding machine will need a transformer with an output voltage of 27 V. Its power is somewhere between 50-60 watts. You can take any other transformer with similar characteristics, or use ready-made sources with adjustable voltage.
Welding from pencil
Simple pencil. It must be carefully cut by gluing without damaging the inner core.
Welding from a pencil
Making improvised terminals. Crocodile for common wire,and a homemade wire hook for the electrode.
Welding from a pencil
We fix the graphite rod into the holder. We solder wires to the transformer.
Welding from a pencil

Welding metal

Before you start welding anything, take care of safety precautions. Be sure to use safety glasses and do not touch live parts. All actions you do only at your own peril and risk, so be vigilant and careful. Prepare a refractory surface for welding: a brick, a piece of stone or tile, and so on. Let's proceed. We will weld two copper wires. We connect the common to the wires to be welded and touch the surface to be welded with an electrode. Initially, the arc does not ignite, the stylus smokes. This is normal for initial startup.
Welding from a pencil
After a couple of seconds, the rod warms enough and the voltage with temperature is enough to ignite the arc.
Welding from a pencil
We continue welding. The main thing here is not to burn the rod, as it heats up to red and breaks.Therefore, periodically we remove it by breaking the arc in order to let it cool slightly.
Welding from a pencil
As a result, copper conductors are perfectly welded.
Welding from a pencil
They cannot be broken as the knot has become one.
Welding from a pencil
There is such a useful property in the farm where you can find it.

Metal cutting

As with a real welder, this mini model is also able not only to weld, but also to cut the metal. But for this it is necessary to increase both the temperature and the current. This can be achieved by reducing the length of the electrode. As a result, the temperature rises sharply. Cut off the self-tapping screw.
Welding from a pencil
Of course I had to spend a little more time, but everything was cut well.
Welding from a pencil
A big plus of such crafts is that no expensive materials are used, but to collect everything in just five minutes of time. Do not underestimate the advantages of such an instrument, in some cases it can definitely come in handy.

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