Explorer30 is the small hydraulic drill rig for coring and drilling for narrow tunnels, underground galleries and surface. It has small built so that easy to install and carry. It has hydraulic regulated spindle to control speed of rotation between 535 rpm to 2200 rpm step less. It can be operated with one person. It can be designed either with electrical engine or diesel engine. The rotation head can be swung aside for hole cleaning or grouting equipment. Explorer30 has automatic hydraulic synchronization system between chuck and rod holder to handle the rods.