Abstract: A guide device for pneumatic saw comprises a fixed member at the front end of th epneumatic saw; the fixed member has a recess channel, in which a fastening plate is mounted by means of screws; the front end of the fastening plate is furnished with a U-shaped plate; the U-shaped plate is furnished with two side plates, between which a gudie wheel with a shaft is mounted; both ends of the shaft are mounted in two round holes in the two side plates respectively; the guide wheel mounted in the U-shaped plate has a wheel groove to be in contact with the flat surface of the saw blade so as to provide the saw blade with a guide and fulcrum effect during the saw blade moving back and forth.

Abstract: A fastening device for pneumatic saw comrpising a body portion and a guide member mounted on the front end of the body poetion; the center thereof is mounted with a movable guide assembly connected together with a power transmission shaft; one side of the movable guide assembly is furnished with two screw holes for receiving two screw bolts respectively; the center cylindrical hole of the movable guide assembly is loaded with a chuck cylinder, which is connected with the movable guide assembly by means of screw threads therein; the chuck cylinder is furnished with a long slot; one side of the long slot has a cylindrival hole for receiving a saw blade; the cylindrical hole of the long slot is opposite to a screw hole on one side of the movable guide assembly; after a screw bolt is screwed into the screw hole, it will press the saw blade firmly in place; one side of the movable guide assembly has another screw hole for receiving another screw bolt so as to have the chuck cylinder fastened firmly in the cylindri

Abstract: A fastening device of a punch assembly of a metal-work pneumatic tool including a threaded rod on a front end of a body of the pneumatic metal-work tool, and the threaded rod is connected, by means of threads, with a punch assembly. The punch assembly has a threaded rod with threads for mounting a threaded ring and a fastening ring mounted around the threaded ring. The position of the threaded ring is to be varied with the setting position of the punch assembly after proper adjustment. The threaded ring will be fastened in place with a stop screw so as to facilitate the later replacement of another punch assembly in a pre-set position without further adjustment of distance.

Abstract: A fastening device of a punch assembly of a pneumatic tool, which mainly comprises a threaded rod on the front end of a body of the pneumatic metal-work tool, and the threaded rod is connected, by means of threads, with a punch assembly; the punch assembly has a threaded rod with threads for mounting a threaded ring and a fastening ring mounted around the threaded ring; the position of the threaded ring is to be varied with the setting position of the punch assembly after proper adjustment; then, it will be fastened in place with a stop screw so as to facilitate the later replacement of another punch assembly in a pre-set position without farther adjustment of distance.

Abstract: A pneumatic metal-work tool includes a punch assembly mounted on the front end of a hydraulic push-rod assembly. The hydraulic push-rod assembly has a hydraulic chamber mounted with a piston rod. One end of the piston rod is mounted in a center hole of a piston. When the control valve of the metal-work tool has a high pressure air entered the casing to drive the piston to move, the pressure air will be converted into a hydraulic force via the hydraulic chamber so as to have the hydraulic push rod provide a punch force, and to have a metal sheet in the opening of the punch assembly punched with a hole.

Abstract: A protection lid to facilitate replacing saw blade of a pneumatic saw, in which the front end of the body is furnished with a fixed member covered with a protection lid; the transmission shaft of the pneumatic saw and the chuck cylinder are mounted in a recess portion; the saw blade extends out through a gap between two guide blocks on the front end of the fixed member; the protection lid mounted on the fixed member has two elongate holes on both sides thereof, which are opposite to a fastening screw of the chuck cylinder; the elongate holes facilitate a hexagon wrench to reach the fastening screw upon replacing saw blade.

Abstract: A pneumatic metal-work tool comprises a punch assembly mounted on the front end of a hydraulic push-rod assembly; the hydraulic push-rod assembly has a hydraulic chamber mounted with a piston rod; one end of the piston rod is mounted in a center hole of a piston; when the control valve of the metal-work tool has a high pressure air entered the casing to drive the piston to move, the pressure air will be converted into a hydraulic force via the hydraulic chamber so as to have the hydraulic push rod had a punch force, and to have a metal sheet in the opening of the punch assembly punched a hole.

Abstract: A protection lid to facilitate replacing saw blade of a pneumatic saw, in which the front end of the body is furnished with a fixed member covered with a protection lid; the transmission shaft of the pneumatic saw and the chuck cylinder are mounted in a recess portion; the saw blade extends out through a gap between two guide blocks on the front end of the fixed member; the protection lid mounted on the fixed member has two elongate holes on both sides thereof, which are opposite to a fastening screw of the chuck cylinder; the elongate holes facilitate a hexagon wrench to reach the fastening screw upon replacing saw blade.

Abstract: A planing device for removing weld beads on car sheet metal, which comprises a handle, a cylinder cover and a support frame; the front end of the support frame is mounted with a round milling cutter; the inner side of the round milling cutter is furnished with a guide frame for adjusting the height between the bottom surface of the guide frame and the surface a sheet metal; when the round milling cutter is rotated at a high speed, the weld beads on a car sheet metal will be planed off.

Abstract: A planing device for removing weld beads on car sheet metal, which comprises a handle, a cylinder cover and a support frame; the front end of the support frame is mounted with a round milling cutter; the inner side of the round milling cutter is furnished with a guide frame for adjusting the height between the bottom surface of the guide frame and the surface a sheet metal; when the round milling cutter is rotated at a high speed, the weld beads on a car sheet metal will be planed off.

Abstract: A rear exhaust device for pneumatic tool, of which the prime feature is that the pneumatic tool has a handle furnished with a control valve; the control valve is mounted in an intake passage of the handle; a threaded sleeve on outer end of the intake passage is connected with an intake connector of an intake pipe; inner end of the intake pipe has a round conduit to be plugged into a cylindrical hole at one end of an intake passage of the dynamic body portion; between the round conduit on inner end of the intake passage in the handle and the outer body portion, an inner exhaust passage is furnished; a compressed air will flow through passages on both sides of a valve seat, an outer exhaust passage, a pressure-shunting ring, and an outer pipe so as to divide the pressure and to provide good intake and exhaust passages to drive the blades and rotor to rotate.

Abstract: An improved grip structure for a pneumatic tool, in which the grip is furnished with a valve seat mounted with a control valve; the central part of the valve seat has an intake passage, of which the outer end is connected with an intake connector, the valve seat and a ring-shaped groove of the bearing-block hole in the dynamic housing are connected and communicated each other by means of an intake passage.