Engraving machine was planned and built to carry out KNURLING procedures on metal wires. This procedure is performed by means of 2 or 3 knurling tools installed on the rotating spindle while the wire is being driven by the downcoiler.

The rotating spindle is driven by means of a mechanical adjustable speed motor, whereas the downcoiler is driven by a geared motor. The uncoiler is loose.

The parts of engraving machine are the following:

1. Metal box-like support structure
2. Adjustable speed motor for the spindle
3. Geared motor for the downcoiler
4. Switchboard panel of electric fittings
5. Loose uncoiler
6. Knurling-tools holding spindle
7. Downcoiler with friction clutch