A rock drill and a set of drilling for rock drilling by percussion.

摘要

A rock drill and a set of drilling for rock drilling for percussion. The invention relates to a rock drill (30) for percussion drilling includes a drill head configured to be connected to one end of a drilling element (33) of the groups To drill, and which has a diameter larger than the bore of said.The head of the drill has a front end (38), seen in the wanted direction of drilling, a plurality of buttons (41) distributed over the head of drill and willing to pick up with a material to be crushed. At least one of these buttons is free to rotate on its own axis of symmetry.