Abstract: A chain bar unit for a wall saw is presented herein. The chain bar unit can include a bar configured to receive a circulating chain or wire around a perimeter of the bar. The chain bar unit also can include a driving gear for driving the chain or wire around the bar, the driving gear configured to be coupled to an output shaft of the wall saw. The chain bar unit further includes the bar being tapered from an end proximate to the driving gear to a distal end having a distal end radius, wherein a width of the bar at the proximate end, is at least two times the distal end radius of the distal end.

Abstract: The present invention is directed toward a shield assembly for a handheld tool device such as an angle grinder. The shield assembly is selectively repositionable with respect to the cutting tool. A lock mechanism secures the shield assembly in discrete rotational positions relative to the cutting tool. The shield assembly includes a guard member and a bumper member, and an alignment feature configured to align the relative positions of guard member and the bumper member, thereby positing the members in a predetermined relative orientation. With this configuration, the shield assembly is selectively repositionable via a “hands-free” mechanism that permits a user to adjust the position of the shield assembly by simply contacting the shield assembly against a work surface.

Abstract: Disclosed is a deburring apparatus. The deburring apparatus includes a transfer module installed on a base to form a transfer path of transferring a workpiece to be deburred, a deburring module provided on the transfer path of the workpiece installed on the base to deburr the workpiece, and a blocking cover installed on the base to reciprocate thereon to selectively prevent the transfer module and the workpiece on the transfer module from being exposed to an outside, and to prevent dust and noise, which are produced when a deburring work is performed for the workpiece by using the deburring module, from being delivered to the outside. The burrs, which are produced when a metallic produce or a non-metallic produce having a 3-D shape is molded or cut, are easily and rapidly removed.

Abstract: A protective hood of portable electric power tools, and a portable electric power tool is described, and wherein a protective hood is provided and which can be selectively located relative to a rotating drive shaft, and wherein a clamping band is provided which mounts a screw that can be radially threadably advanced toward the rotating drive shaft and which further carries an anti-rotation locking element having claws which mechanically engage a machine neck thereby reliably and securely fastening the protective hood to the power tool.

Abstract: A battery-operated hand-held power tool (2), especially an angle grinder, comprises a housing base (4) accommodating the electromotive drive components and air inlet openings (10) supplying the electromotive drive components with a cooling air flow. In order to protect the electromotive components from dirt, the hand-held power tool is designed in such a manner that a filter element (20) is provided in the area of the air inlet openings (10) and keeps dust, especially magnetizable dust, away from the electromotive drive components. The filter element (20) is retained by a filter retaining part (12, 30) which can be attached to the exterior of the housing base (4). The filter retaining part (14, 30) can be elastically deformed to such an extent that it is slightly deformed, especially expanded, when attached to the housing base, and engages behind or snaps into an element on the housing base.

Abstract: A safe guarding assembly for a grinding gun has a body, a rear protective cap and a front protective cap. The body has a casing. The casing has a front end, a shaft hole and a retaining ring. The shaft hole is formed through the casing. The retaining ring is formed on and protrudes from the front end of the casing around the shaft hole. The rear protective cap is mounted securely around the retaining ring of the casing and has a front end, an inner thread, a through hole and a mounting ring. The mounting ring is formed on and protrudes from the front end of the rear protective cap and has an external surface and an outer thread. The front protective cap is mounted detachably around the mounting ring of the rear protective cap and has an inner thread and a conical segment.

Abstract: A dust shroud for rotary tools includes a front half and a back half which are attachable together along an axis thereof to form a dust shroud. The dust shroud is mountable to a rotary power tool after mounting a mandrel in the power tool, and includes one or more openings to allow a person to lock the shaft of the tool while the dust shroud is mounted thereto to allow a person to change a worn out abrasive pad. The dust shroud is particularly suited for use with die grinders and similar rotary tools.

Abstract: A guard device (10) for handheld power tools with a disklike and rotating tool (12) includes a base body (14) formed by a platelike element (30) having a semicircular embodiment formed as a peripheral region (32). A guard rim is disposed on the peripheral region (32) and has a portion (36) oriented perpendicular to the platelike element (30) and a further portion (38) oriented parallel to the platelike element (30). An energy absorption element (16) is coupled to the base body (14) via a coupling and located between the portion (38) and the platelike element (30). The coupling is embodied fixedly in normal operation and enables in an emergency mode enables a rotary motion of the energy absorption element (16) relative to the base body (14).

Abstract: A universal dust shroud includes mounting brackets held above the shroud body by springs. The brackets move radially and vertically relative to the body to accommodate different angle grinders, and allow vertical movement of the shroud body relative to the grinding disk while using the grinder to allow the user greater control over the angle grinder.

Abstract: A protective cover of a hand-held cut-off machine has a bracket that is secured on the exterior side of the protective cover. The bracket is locked in at least one locked position with at least one locking projection in at least one receptacle of the protective cover. The bracket is releasable from the locked position by a movement of the bracket in the release direction. A simple release of the bracket can be achieved in that the protective cover has means that move the locking projection upon movement of the bracket in the release direction at least partially out of the receptacle.

Abstract: The invention relates to a portable power tool for a rotating, preferably disk-shaped tool (12). Said portable power tool comprises a machine housing (14), having a flange (16, 160) or a machine neck, and a protective hood (18) that can be detachably tensioned on the machine neck to cover the tool (12) or that has a protective hood neck (20) or protective hood collar that annularly carries a tightening strap (22). Said strap can be tightened by tensioning means (24). An anti-rotation lock effective between the machine neck and the protective hood (18) is interposed between the protective hood (18) and the machine neck in the form of a profiled structure (26). The invention is characterized in that the tensioning means (24), in its tensioned position, can be connected several times in a form fit to the machine neck and in its detached positioned is no longer connected in a form fit to the machine neck.

Abstract: A battery-operated hand-held power tool (2), especially an angle grinder, comprises a housing base (4) accommodating the electromotive drive components and air inlet openings (10) supplying the electromotive drive components with a cooling air flow. In order to protect the electromotive components from dirt, the hand-held power tool is designed in such a manner that a filter element (20) is provided in the area of the air inlet openings (10) and keeps dust, especially magnetizable dust, away from the electromotive drive components. The filter element (20) is retained by a filter retaining part (12, 30) which can be attached to the exterior of the housing base (4). The filter retaining part (14, 30) can be elastically deformed to such an extent that it is slightly deformed, especially expanded, when attached to the housing base, and engages behind or snaps into an element on the housing base.

Abstract: A hand-held power tool for rotating a working tool disc (30) includes a removable protection hood (6) for partially covering the working tool disc (30) during operation, and a clamping device (8) for securing the protection hood (6) relative to a power tool head (2) and having a clamping member (12) that limits partially a substantially cylindrical region (14) for receiving an attachment collar, and a clamping element (20) provided at opposite ends (19) of the clamping member (12) for displacing the clamping device (8) into its locking position and having a locking region (34) projecting into the receiving region (14) of the clamping member (12) at least in the locking position of the clamping device (8).

Abstract: The invention relates to a protective hood for a portable tool with a rotary tool, having a clamping device designed as a clamping ring for fastening to a machine neck of the portable tool, and having an anti-rotation locking means for fixing the angular position of the protective hood relative to the portable tool. It is proposed that at least one rotation-locking element (19) which can interact with a rotation-locking element (19) of the machine neck be arranged in a fixed position on the clamping ring (7) for forming the anti-rotation locking means. A portable tool having such a protective hood (1) is also proposed.

Abstract: A handheld power tool has a housing, a rotating cutting tool having a clamping neck structurally connected to the housing, a guard hood that covers the cutting tool and has a guard hood part and a slip-on ring for receiving the guard hood releasably and adjustably on the clamping neck, the slip-on ring being connected to the guard hood part and having detent means for axially securing the slip-on ring to the clamping neck, and additional torsion-prevention means configured as a stop flange provided on the guard hood, the flange being provided in addition to the slip-on ring and connected to the guard hood part so that, in an installed state the stop flange is in contact with a component of the power tool that is structurally connected to the housing.

Abstract: A rotary nail filing apparatus for animals is described that includes a shroud or housing, an opening in the shroud that is suitable sized and shaped to allow an end portion of an animal's nail to be put through the opening, and a suitably shaped and oriented rotary grinder that is contained within the shroud grinding at least a portion of an animal's nail when put through the opening, where at least a portion of the nail particles that are grinded away by the rotary grinder are contained in a portion of the shroud. In some embodiments, the rotary grinder position/orientation and/or its surface are adjustable and/or replaceable.

Abstract: The invention relates to an electrical hand tool device, in particular an angle grinder with a machine housing for holding a motor for the rotating drive of a drive shaft and a driven shaft connected with it via an angular gear for attaching a grinding tool at its free end, whereby a protective guard (12) that surrounds the grinding tool with a base body (14) at least partially and exhibits a protective guard neck (16) that is connected to the base body (14) and that can be detached together with said protective guard neck at a flange (20), which is positioned at the machine housing, and can be secured and locked in discrete adjustable rotational positions at the flange (20), whereby the protective guard (12) can be secured and locked at the flange (20) in a rotational position using a notch lever (18), and where for this purpose a ratchet cam (42) at the notch lever (18) reaches through an opening (40) in the protective guard (12), where a pivoting axis (22) of the notch lever (18) is arranged parallel to th

Abstract: A rotary nail filing apparatus for animals is described that includes a shroud or housing, an opening in the shroud that is suitable sized and shaped to allow an end portion of an animal's nail to be put through the opening, and a suitably shaped and oriented rotary grinder that is contained within the shroud grinding at least a portion of an animal's nail when put through the opening, where at least a portion of the nail particles that are grinded away by the rotary grinder are contained in a portion of the shroud. In some embodiments, the rotary grinder position/orientation and/or its surface are adjustable and/or replaceable.

Abstract: A manually operated electric machine tool for a disk-shaped rotating tool (18), having a machine housing (11) from which a drive spindle (12) for the tool (18) protrudes and on which a hollow cylindrical collar (15) is embodied coaxial to the drive spindle (12), and having a guard (20) that is detachably connected to the machine housing (11) and is designed to at least partially cover the tool (18), which guard can be mounted to and fixed in relation to the collar (15) by means of a clamp (23) with a clamping element (24). To set the guard (20) in desired rotation positions in relation to the machine housing (11) without using an auxiliary tool, and to secure the guard (20) in any rotation position, the clamp (23) is secured to the collar (15) in a rotating fashion and a manually releasable locking mechanism is provided between the clamp (23) and the collar (15) (FIG. 1).

Abstract: A machine tool has a support table provided on an upper surface of a bed to support a work, a Z-axis saddle, a machining unit mounted on the Z-axis saddle and provided with a machining head, a compartment cover arranged on the bed to compartment a region and a machine region, an opening window provided on the compartment cover to permit the machining head to go in and out therethrough, and a seal member in the form of a closed ring to be mounted on an inner peripheral edge of the opening window of the compartment cover, wherein an entire periphery of an outer peripheral surface of the machining head is brought into sliding contact with an inner peripheral edge of the seal member in a state, in which the machining head is moved into the machining region from a tool exchange position within the machine region.

Abstract: A pusher mechanism for attachment to the carriage, saw guard, or other appropriate point of a rotary-blade stone slab saw. Using either signals from a controller of a modern slab saw or self-generated sensor information, the pusher is actuated at a precise time in the cutting process and applied an outward pressure on the severed slab to ensure that the slab is directed away from the saw blade. While a pneumatic cylinder is typically used, either hydraulic, electro-mechanical, or mechanical mechanisms may also be used to accomplish the push-away function.

Abstract: A portable power tool, in particular an angle grinder (10), includes a longitudinal housing (12) for accommodating a motor for driving a driven shaft (16) that is outwardly bent relative to the housing (12), the driven shaft being rotatably supported in a gearbox casing (14) and extending out of it with a free end that is provided to accommodate a sanding body. A protective cover (43) encompassing the sanding body is capable of being fastened on the gearbox casing (14) such that its rotation can be adjusted, and the rotational position of which is lockable using a notch lever (30). The device is made safer to operate and more cost effective to manufacture by the fact that the notch lever (30) is positioned transversely to the longitudinal axis of the angle grinder (10) and is pivotable around an axis (34) positioned substantially parallel to the housing (12).

Abstract: A knife sharpener includes a housing having one or more access slots for receiving knife blades to be sharpened, one or more grinding wheels rotatably received in the housing and disposed close to the access slots of the housing for grinding and sharpening the cutting edges of the knife blades. The housing includes one or more openings formed in either or both of the end portions of the access slot of the housing and communicating with the access slot of the housing, and having a width greater than that of the end portions of the access slot of the housing, for receiving and preventing the cutting edge of the knife blade from being blunted by the housing after sharpened by the grinding wheel.

Abstract: A grinding tool comprising a housing (1) and a motor-driven driver spindle (2) equipped with a tool receptacle (4) at a free end (3) projecting from the housing (1). An extraction hood (5) is connected to the housing (1), encloses the free end (3) of the driver spindle (2) and open towards the tool receptacle (4). The extraction hood (5) comprises an upper part (6) and a bottom part (7) connected therewith and opening towards the tool receptacle (4). The upper part (6) is pivotable about the longitudinal axis (L) of the driver spindle (2) and is mounted on the housing (1) immovably oriented with the longitudinal direction (L).

Abstract: In a chip collecting apparatus for a tip dresser of the present invention, a chip pickup case mounted on a dresser main body is divided into an upper case and a lower case, and the lower end of an arm admission port formed in the upper case is opened downward. During teaching operation, the lower case is rotated to open the lower end of the upper case, through which the insertion of a first gun arm into a lower chamber can be visually checked, and thus an electrode tip provided at the end thereof and a dressing body for dressing the end of the electrode tip are guided such that the central axes thereof conform to each other.

Abstract: A sharpening attachment for a powered rotary hand tool of the type which has an output shaft with a tool bit holder that extends from a housing is disclosed. The sharpening attachment is mounted on the housing and comprises a body portion with an interior opening through which a sharpening bit held by the tool bit holder can pass, with the sharpening bit being exposed for engaging a surface of a tool. The attachment has a jaw portion attached to the body portion which extends forwardly thereof and also has a support surface for holding the tool member at a predetermined angle relative to the sharpening bit, and an extension attached to the body portion and extending forwardly thereof at least to a point that includes a major portion of the exposed portion of the sharpening bit for the purpose of providing a protective guard.

Abstract: The present invention is a splash shield housing for encompassing wet saws having a trough positioned along the interior of the housing for containing the overspray. The housing can be extended to encompass three sides of a wet saw with the extension maintaining the integrity of the housing. Positioned above the trough on the back side is a splash guard comprised of an extendable retractable impermeable sheet having means for extending and attaching the sheet to the back table lip to prevent any overspray coming back between the table and rear wall trough.

Abstract: Guards for covering rotating discs of power hand tools wherein said guard includes a movable guard for covering a normally exposed portion of a disc and which is pivotably mounted relative to a body of the power tool such that the it is movable from a first covering position in a plane substantially parallel to a rotational plane of the disc to a second withdrawn position in which the movable guard extends generally transversely to the rotational plane of the disc thereby allowing maximum disc coverage yet permitting disc use in restricted spaces.

Abstract: A protective hood (1) for a right-angle grinder having a tightening device, which has a tightening band (4) firmly connected to the protective hood (1) for a right-angle grinder, the two ends (5, 6) of the tightening band being embodied as a first and second eyelet (7, 8), so that they form a first and second abutment (9, 10) and can be connected to one another under tension by means of at least two tightening elements, the first tightening element being a tightening lever (2), which with its first end (15) can be supported in the first eyelet (7) pivotably about a first axis (9a) and which can be brought into a first position in which the tightening device is not tightened, and into a second position in which the tightening device is tightened, becomes capable of being produced at less expense with still high quality by providing that the second tightening element is a spring (3), which can be connected movably to the tightening lever (2), the spring (3) being pivotably supported about a second axis (11) in

Abstract: A grinding tool comprising a housing (1) and a motor-driven driver spindle (2) equipped with a tool receptacle (4) at a free end (3) projecting from the housing (1). An extraction hood (5) is connected to the housing (1), encloses the free end (3) of the driver spindle (2) and open towards the tool receptacle (4). The extraction hood (5) comprises an upper part (6) and a bottom part (7) connected therewith and opening towards the tool receptacle (4). The upper part (6) is pivotable about the longitudinal axis (L) of the driver spindle (2) and is mounted on the housing (1) immovably oriented with the longitudinal direction (L).

Abstract: A safety guard assembly is adapted to be conveniently moved into position between a work area and an operator station. The safety guard is characterized by a unitary transparent polymer having a planar portion and ribs that impart to the planar portion rigidity against longitudinal bending and transverse flexing. Brackets are attached to opposite sides of the guard and an associated handle and one end of an associated universal support arm are connected to each bracket. The opposite end of each universal support arm is mounted remote from the work area. The handles and universal support arms enable the guard to be quickly and conveniently moved by an operator between positions adjacent to and remote from the work area. When moved between the work area and operator station, the guard restricts, from passage to the work station, chips, broken tools, coolant, etc.

Abstract: Abrading and cutting devices such as saws include waste containment systems and methods to improve removal of slurry or other contaminants from a work area during operations, and separation of slurry from a carrying medium such as air. A vacuum bar includes high and low vacuum openings to help focus flow and to conserve vacuum pressure. One opening faces the saw blade. A slurry containment and separation container includes walls and configurations for the inlets and outlets that enhance cleaner separation of the air and the slurry. Coolant is applied to the saw blade to make operation and cleanup more efficient. The vacuum generator can operate off of the power generated by the machine.

Abstract: A stone cutter has a sink standing upon a callapible support, a frame disposed on the sink including an upright at a corner portion and a guide rod longitudinally secured in the frame, a platform including a tubular slider of splined inner periphery sliding on the guide rod and plurality of pulleys on the other side slidable on the frame, a housing including a sleeve sleeved on the upright of the frame, a switch, an indicator transversely disposed in the housing positioned opposite to the sleeve, a saw blade secured to an axis of the motor and a casing covering the upper portion of the saw blade having one end rotatably secured to the housing and a pair of water suppliers on two side to provide water to clean the dust from a working piece during the operation of the stone cutter.

Abstract: In order to improve the operational reliability of an extending system with at least four extending elements (10, 20, 30, 40, 50) which are disposed behind one another and can be moved relative to one another in a direction of extension (B) as well as a direction of insertion (A) opposed thereto between an inserted position and an extended position it is proposed that for coupling the motion of the individual extending elements (10, 20, 30, 40, 50) a coupling arrangement be used which has a coupling element (28) which runs round a return spindle (24, 26), wherein the said return spindle is fixed relative to the middle extending element (20) of a group of three extending elements (10, 20, 30) disposed behind one another and extends perpendicular to the direction of extension, and the said coupling element (28) is movable along a path which is fixed relative to the return spindle (24, 25) and runs round the latter, the coupling arrangement also having two entraining elements (12, 31) which on the one hand are c

Abstract: The invention relates to a cover for a machine bed of a machine tool with covering boxes which can be pushed telescopically one inside another, wherein each covering box comprises a first and a second side wall and a top wall joined to the side walls. On at least one side wall an outwardly projecting catch is arranged for the next largest covering box, provided with a counter catch. The catch is configured in a profiled catch section arranged in a side wall. A shock absorbing element is arranged on the catch, which dampens the impact between the catch and the counter catch. Furthermore, a stop is provided on the profiled catch section, which can be brought into contact with a profiled catch section or a rear wall of the next-largest covering box. The stop serves to dampen the impact between two covering boxes.

Abstract: A portable power tool for operating a wheel type grinding or cutting working implement comprises a housing (10), a rotating output spindle (11) with a working implement supporting flange (14), a safety guard (16) adjustably supported on a guide flange (15) on the housing (10), and a selectively operable arresting device (18) for positively engaging lock openings (20) on the safety guard (16) for locking the latter in alternative positions relative to the housing (10), wherein the support flange (14) is provided with a number of peripheral indentations (21), and the arresting device (18) comprises a lock bolt (19) which is longitudinally shiftable between a first position in which it engages either one of the lock openings (20) on the safety guard (16), a second position in which it engages either one of the lock openings (20) on the safety guard (16) as well as either one of the support flange (14) indentations (21), and a third position in which it neither engages anyone of the safety guard (16) lock opening

Abstract: A grinding machine utilizing multiple, parallel, endless, abrasive belts for simultaneously grinding several surfaces on a workpiece, such as cam lobes on a cam shaft. The grinding machine includes a contouring head assembly comprising a plurality of contour feed units, each contour unit including a curved back-up shoe, a back-up shoe holder, an adaptor for mounting the shoe holder, and a ball-spline mechanism is secured to the adaptor for transmitting power from a drive motor to the back-up shoe to press an abrasive belt, associated with the back-up shoe against a workpiece. A locating lip is defined on each adaptor, and a reference pad is established on the contouring head assembly.The adapters are divided into an upper and lower row, and the locating lips are formed oversized. One row of lips is ground to a desired distance from the reference pad, and the other row of lips is then ground relative to the previously ground row of locating lips.

Abstract: A grinding unit for producing standardized tools such as end milling or slot cutters, reamers, twist drills, screw taps, and the like. The grinding unit has a grinding spindle holder that is adapted to be mounted on a base. At least one grinding spindle that has a grinding wheel is secured to the grinding spindle holder. A carriage is movable on guides on the grinding spindle holder. A workpiece holder is movable on guides on the carriage transverse to the direction of movement of the carriage. A protective housing is secured to the carriage and extends closely around the workpiece holder and the grinding wheel.

Abstract: A dual-light assembly is provided for a bench grinder having a centrally-located motor housing, two laterally-projecting wheel housings mounted on opposite sides of the motor housing relative to each other, a grinding wheel or wire brush rotatably mounted within each wheel housing and defining a respective work station, and a shield assembly mounted to each wheel housing by a shield fastener and including a transparent shield mounted over a respective work station. Two lamp brackets of the dual-light assembly each define a mounting wall forming an elongated slot for receiving a respective shield fastener, and clamping the lamp bracket between the associated wheel housing and mounting arm of the shield assembly. Each shield fastener is slidable through the respective elongated slot for adjusting the position of the bracket relative to the respective work station.

Abstract: A machine tool includes a cover member covering an upper open portion of a movable carriage and at least one chain member to connect the cover member to the carriage. The cover member hangs down the front surface of the carriage and forms a U-shape with the at least one chain member at the lower side of the carriage. Chips that are trapped on the inside of the cover member are discharged through an open portion when the at least one chain member is located at the lowest point of the U-shape through the movement of a column of the machine tool.

Abstract: There is described a bench grinder in which the operation of particular functional elements has been enhanced. Among significant improvements are shield-mounted lamps by means of which lighting in the work zones of the grinder is improved. Glare has been markedly reduced through directive light-shielding shades strategically located, through end lighting of the shields, and through light frequency selection. The lighting bulbs are energized by a 12-volt supply derived from pick-up leads connected to the windings of the 110-volt motor which drives the grinder wheels. The tool rest has been extended forwardly at the outer sides of the abrasive wheels to provide support laterally of the grinding wheels in addition to in-line support. A grinder-carried wheel dressing tool of a uniquely efficacious configuration facilitating its use is conveniently affixed on the grinder chassis, as is a wrench used in making selectable operational adjustments on the grinder to ensure optimum and safe operation.

Abstract: A device for clearing material waste from telescopic plates of a cutting machine and includes an affixing element and a clearing rubber mounted to an underside of each telescopic plate. The affixing element has at least one groove to hold the clearing rubber which has a clearing edge and sliding surfaces. The clearing edge clears material waste from the upper surface of its adjacent plate, when the plates are retracted.