Friction drill principle
  The DRABUS frictiondrilling process creates the possibility of making holes in thin metal sheets and thin-walled tubes in just a few seconds without chips, while forming a bushing at the same time. This bushing can be used as a soldering or welding connection or as a bearing bushing. By tapping a screw-thread it can also be used as screw connection.

The DRABUS frictiondrilling process replaces and eliminates the use of rivet or welding nuts as well as steel insert bushings. 
It accordingly saves time, work and material.

The DRABUS frictiondrilling process is suitable for :
Making holes from 2.0 to 32 mm in all kinds of steel up to 1200 N/mm˛ tensile strength, including stainless steel, aluminium, brass and copper with a thickness of 0.5 to 6 mm depending on the material used for the hole diameter.