Abstract: The present disclosure illustrates a compressed air tool having a silencer structure. A silencing element and an outer cover are disposed in an air exhaust channel of a main body of the compressed air tool. The silencing element has two walls and a channel. The two walls both have long slits, the long slits of the two walls are misaligned and not directly faced with each other. After the exhaust is inputted via the long slits of one of the two walls, the exhaust is flowed through the channel and emitted to the outside via the long slits of other of the two walls. Therefore, the air flow of the exhaust can be weakened, and the exhaust is then entered the countersink of the outer cover and emitted from the side hole, whereby the effect of silencing and reducing the noise caused by the emitted exhaust can be achieved.

Abstract: An air tool handle includes a first bushing and a second bushing prepared by different molds as two independent objects. The first bushing and the second bushing have a first hollow part and a second hollow part, respectively, that are in communication. The first bushing has several through parts and concave areas. The second bushing has several thin parts complementary to the concave areas and several thick parts connected with the thin parts and filling the through parts outward. The first bushing and the second bushing are combined along the same axial line. The first hollow part and the second hollow part accommodate the first body of an air tool or hand tool.

Abstract: A pneumatic tool with an improved soundproof device includes a housing whose rear end has a screw hole for supplying a high-pressure gas. The input high-pressure gas drives a pneumatic motor before it leaves the rear end of the housing. A cover covers the rear end of the housing. The cover has a penetrating hole. A guiding element has a guiding section that gradually expands outwards. The guiding element goes through the penetrating hole. An annular ventilation space is formed between the guiding section of the guiding element and the penetrating hole. A gas inlet connector is disposed in the screw hole. The shoulder part of the gas inlet connector stops the guiding element, so that the gas in the ventilation space is guided by the guiding section of the guiding element to escape.

Abstract: In a pneumatic grinder with an improved air intake control apparatus, a press board is designed on the bottom of a handle of the grinder and disposed at a position proximate to a grinding head, and a force applying end of the press board is turned by fingers by means of a first lever-and-fulcrum pivoting method, so that a pulling end of the press board pulls a pull rod of the air intake control apparatus to move downward and allows air to circulate. The operation by fingers is easier than the operation by pressing a palm onto the top of a handle at the press board. A second lever design allows a speed adjusting knob of the air intake control apparatus to be situated at a position nearer to the grinding head.

Abstract: A pneumatic saw power transmission structure includes a main body, a first transmission module and a second transmission module installed adjacent with each other in a containing groove of the main body. The second transmission module includes a position limit device fixed at the main body for limiting the second transmission module in the containing groove of the main body to constitute the transmission structure of the present invention.

Abstract: A grinding machine with a length-adjustable dust collecting structure includes a dust collecting structure, and the dust collecting structure includes a dust collecting pipe and a moving element, and the moving element is installed at a front end of the dust collecting pipe for collecting dusts produced after a grinding process, and the moving element can be pushed or retracted from the front end of the dust collecting pipe, such that the displacement of the moving element at the front end of the dust collecting pipe allows the dust collecting pipe to effectively suck the dusts produced during the grinding process.

Abstract: A pneumatic grinder with improved handle structure comprising a driving portion, a connecting portion, and a grinding portion wherein the connecting portion has a handle fixing portion at one side thereof that has an accommodating space to receive a pivot element wherein the handle fixing portion has a slot on the top thereof, and further, a handle is fixed with the pivot element by screwing so that the handle can be pivoted along the slot and the grip angle thereof can therefore be adjusted.

Abstract: A grinding wheel includes a grinder engaged between a front cover and a rear cover, and rough portions of the front cover and the rear cover press against the grinder tightly. After center rods and fixed rods of the front cover and the rear cover are passed through center holes and fixing holes of the grinder, a bolt is passed through the fixing hole and secured with the nut to form a grinding wheel.

Abstract: A grinding machine with a dust collector includes a driving portion, a transmitting portion, a dust-collecting tube, a fender, an air intake connector and a grinding wheel. The dust produced by the rotation of the grinding wheel is sucked by the dust-collecting tube having an inner tube. The inner tube is interconnected with an exhaust vent of the driving portion and the dust-discharging opening. An outlet of the inner tube is parallel to an airflow passage of the dust-discharging opening, such that when an exhaust gas is discharged from the inner tube, a siphon effect is produced at the airflow passage of the dust-collecting tube to suck and collect the dusts produced by the grinding wheel.

Abstract: An abrasive wheel with improved structure comprises: an abrasive component, an adapting ring received by the combining hole in the central region of the abrasive component, two covers which are posited about both mounting surfaces respectively, wherein each cover at the surface thereof facing to the corresponding mounting surface has a pressing segment and a blocking segment, wherein each pressing segment comprises a plurality of teeth so that after the disclosed abrasive wheel is assembled, the blocking segment leans against the inner wall of the combining hole and the teeth of the pressing segment lean against the corresponding mounting surface, and further, a plurality of raised columns provided at the surface of each cover facing to the corresponding mounting surface and each opening defined by each two adjacent raised columns which is complementary to the shape of the raised columns so that after the disclosed abrasive wheel is assembled, the raised columns of either the cover can be engaged by the openi

Abstract: A pneumatic grinder with improved muffling structure primarily comprises a driving portion, a grinding wheel fixing portion provided at one end of the driving portion, a first housing connected to the other end of the driving portion by means of a combining portion, a second housing mounted onto the first housing, and a plurality of first and second exhaust openings arranged in staggered fashion respectively on the first and second housings. Said structure allows the pneumatic grinder to discharge waste air through foresaid two layers of exhaust openings in staggered fashion arranged in order to reduce noise during air exhaust.