Coupling, in particular for diamond bit with shank pipe and pipe thread connection

摘要

In a coupling for tubular drill stems with power transmission, a first coupling part (8) forms an end closure of the drill stem (2), in particular of the shank of a diamond bit. A second coupling part (3) can be connected to the first coupling part (8). The first coupling part (8) is made of plastic and is connected to the drill stem (2) at its periphery. The drill stem is adhesively bonded and/or shrunk on the periphery of the first coupling part (8). The strength of the connection is increased by interlocking grooves and projections of the connected surfaces (100-103). <IMAGE>