Mini pile (micro pile) drills are a special type of drilling machine, generally for vertical drilling or with small inclination with respect to the vertical axis. They are used to reinforce existing foundations, or to make new foundations in difficult-to-drill grounds by other means of heavy foundation. The machines to work in reduced gauge sites and dimensions in general have special relevance, which requires machines of very small dimensions, capable of drilling in corners, narrow corridors, and in different positions. It is also very important that they do not produce exhaust gases since they are generally working in interiors of buildings, hence the suitability of the electrical power
