Drilling tool for pilot holes

摘要

The rotary impact drilling tool converts rhythmic axial impact movement of a conical drill bit into a radial pulse of the tool shank. The radial tool is supported by diametral longitudinal ridges in the shaft sleeve. Centralising pins ensure a given amount of clearance for the shaft sleeve. A top mounted suction head ensures that debris and dust extraction is carried out utilising an annular duct which connects a radial duct with an axial duct.