The ST-30 tunnelling rig is suitable for the sub-horizontal consolidation of medium-size tunnels, with a drilling radius of between 1528 mm and 5037 mm (drilling mast inclination 0°) and max. heading stroke heights of 6767 mm.

It can be used in tunnels with a greater section, using the so-called “half-section” method with the first phase envisaging the reinforcement of the upper heading, and the following excavation of the invert in the second phase.
The machine has two motors (diesel and electric) of a suitable size for each single motor to perform all the drilling, traversing and positioning operations of the crawler.

The following drilling techniques can be applied using the ST-30:
- Rotation (with or without casing)
- Rotopercussion by means of Top Hammer (with or without casing)
- Rotopercussion by means of Down the Hole Hammer (with Tubex, Odex or Simmetrix superjews system)