Cycloid motor and gear reductor forms drilling rig's strong power head, Transmit is stable with big torque.

Wear resisting Nylon plate avoids guide rail from wearing when power head operates.

Choosing different mine wheel components in accordance with different gauge in the tunnel to make the drilling rig move its position. Four support hydro-cylinders can move individually.  It can adjust the horizontality and verticality of guide rail fast so that the rig can drill high precise horizontal bore and vertical bore.

The height of horizontal bore can be largely improved when four support hydro-cylinder move at the same time.