The overburden drilling method (similar to the double-head drilling method) has only one rotary drive and only one direction of rotation. Use with

• Down-the-hole hammer
• Solid auger

(outside casing with ring drill bit, the inside casing mainly with solid drill bit)

Soon you will find more detailed information here.

• Please do not hesitate to contact us for further information. We will be happy to advise you individually!