A drilling device and a corresponding manufacturing method

The invention relates to a tapping machine (1) for mounting on a plastic pipe, with the tapping fitting a saddle member (2), an an outer sleeve (3) of a Anbohrkartusche (4) outgoing surrounds cartridge housing (5) and one of the cartridge housing (5) connection piece (6), wherein the seat member (2), the cartridge housing (5) and the connecting piece (6) made of the same electro-weldable plastics material are formed as a one-piece molded plastic part, and being formed, the cartridge housing (5) and the Anbohrkartusche (4) in one piece are, including the cartridge housing is an extrusion coating of Anbohrkartusche (4) from the plastic material, with a side wall (7) enclosing an outer shell surface (8) of the sleeve (3), a one piece on the side wall (7) integrally formed cover side (26 ) having an upper end face (9) of the sleeve (3) through which a drive spindle (10) of the Anbohrkartusche (4) from the cartridge housing (5) h erausragt, encloses, and integrally formed with a one piece on the side wall (7) bottom side (38) including a lower end face (12) of the sleeve (3) through which a drill head (13) of the sleeve (3) out can be displaced , encloses, characterized in that the one-piece plastic molding of the saddle element (2), cartridge housing (5) and connection piece (6), which may be in particular an injection-molded part, all sides of the sleeve (3) outer completely surrounds and in one piece, in particular at least the outer surface (8), the upper end face (9) and a lower end face (12) of the sleeve (3). It is further described a method of manufacture.