We are granted the Chinese invention patent (No. 200410093345.2) to produce the state of the art Pneumatic tapping machine. This is the genuine unit to work in any position in space therewith always maintaining the perpendicularity to the desired plane irrespective of the arm position. The machine consists of a radial arm supporting both articulated arms that can be regulated by means of the regulating valves. The multiposition head is a double swivel joint device allowing to lock and unlock both its swivel pins to thus position the head and keep it quite blocked in order to thus operate in any position in space. The radial arm incorporates a chain drive, which is activated or deactivated by means of a face-toothed coupling half according to the intended working position. The machine incorporates an air servicing unit (filter + regulator + lubricator) for the correct operation of the motor. The modular system consisting in a series of 7 quick-change modules (reducers) is provided for coupling to said motor. As a result of this output speed(400) are available. The modular system admits the quick-change tap holders with or without safety clutch depending on the intended job (blind or through holes). Threading capacity from M4up to M16.