Abstract: Device for drilling a hole of predetermined depth having an abutment member non-rotatable in relation to the stationary part of the drilling machine and provided with an abutment surface intended to come into contact with the work piece by the displacement of the drill spindle of said drilling machine towards the work piece, a driving member intended to be connected to the drill spindle said driving member being rotatably and displaceably arranged in relation to the abutment member, a holding member intended to hold the drill and being rotatably mounted relative to the abutment member and displaceably but not rotatably connected to the driving member and provided to be secured against axial displacement in relation to the abutment member and a spring provided between said driving member and said abutment member, the driving member being displaceably in a direction towards the work piece against the action of said spring.