Tmt Tapping-measuring-technology Sarl

Gerhard Meier

A drill bit () for the drilling, in particular the rotary percussive drilling, of a hole, in particular a tap hole of a melting furnace, the drill bit () comprising a drill head (), which has at least one hard material insert (), and a base body () for connecting the drill bit to a driving element, the hard material insert () being inserted into a seat, which is formed in an axial end face () of the drill head (), in such a manner that at least a head cutting edge () of the hard material insert () protrudes beyond the axial end face (), wherein the seat has a flank portion and a mating flank portion located opposite the flank portion, between which the hard material insert () is disposed, the flank portion, which is disposed opposite a recess formed in the hard material insert (), being provided with a material projection () which is at least partially made of a welding material, is bonded to the drill head () via the welding material and protrudes into the recess so as to establish a form-fitting connection with the hard material insert ().

Growing community of inventors

Trier, Germany

Gerhard Meier