The machine consumables are electrodes. For iron metals, brass is commonly used. Whatever the shape of the brass is, the shape of the hole will be. Brass electrodes, or brass screws can be used.
When working, the machine needs to be placed in pure water, so that the water can dilute and take away impurities.
The diameter of the hole is 1-6mm. If the hole is more than 6mm, you can try to use a hollow brass tube. The depth of the hole is 8mm. If it exceeds 6mm, it is relatively slow.
Because the impurities punched by the hole depth are not easy to discharge, it will cause discontinuous sparks. , thus slow.



