Integral Drill rod is used by a hand
held drill machine in Underground mining and for small hole drilling, equipped
with small power Rock drills, like Air Leg rock drills, Hand Held Rock Drills,
etc. It can reduces the expense of impact energy, improves the drilling speed
and efficiency, also it can be used for drilling bore hole diameter from 30mm
to 41mm usually. Regarding Integral drill steels，the
quality of a steel material and a tungsten carbide is very important to get
good drilling performance.