Robert Boschgmbh

Hawera Probst Gmbh

Aresi S.p.a.

Friedmar Dresig

Joachim Hecht

Marco Lang

Franc Koljaka

Thomas Bernhardt

Jens Weidlich

A tool bit for a chisel or a hammer drill, in particular, a insertable chisel or insertable drill for power-driven drill and chisel hammers, has an insertion end, with a chisel shank or drill shank, and a chisel head or drill shank located opposite the insertion end. The diameter of the shank increases in the direction of the chisel head at least once from a first, small diameter to a second, large diameter and decreases again from this to a small diameter or forms at least one bead.

Chisel

A hand power tool has a percussion mechanism; a drive motor that drives the percussion mechanism; a conversion element for converting a movement of the drive motor into an axial movement; and an operating unit that adjusts a rotary movement of the conversion element within a percussion period depending on at least one optimization criterium.

Hand power tool with a percussion merchanism, and as a method of operating the hand power tool

Growing community of inventors

Chemnitz, Germany

Friedmar Dresig