Abstract: A dust and chip removal device for sanding hand power tools has a storage container securable to a hand power tool, a transport channel via which dust and chips are directed into the storage container, a retaining element preventing the dust and chips from flowing back out of the storage container, the retaining element having at least one passage, an elastic element which has a holding force closing the at least one passage, the passage being openable automatically against the holding force at starting at a certain delivery pressure, while the elastic element automatically closes the passage below a certain delivery pressure, and a channel having cross-sectional area which tapers toward the passage.

Abstract: A knife sharpening system for sharpening blade edges of knives. The knife sharpening system includes a base portion having an elongate guide rail having a top surface at a first level, a knife support for maintaining a blade of a knife being sharpened with its blade edge spaced apart by a horizontal distance from the guide rail and for elevating the blade on a plane at a second level which is higher than the top surface of the guide rail. A sharpening implement that is longer than the distance between the guide rail and the blade edge is provided, and placed on the blade's edge and the guide rail, and is moved thereacross to sharpen the knife edge.

Abstract: An air-guiding structure for an air sander includes a muffler assembly integrally formed from plastic material, a main passageway and a sub-passageway formed in the muffler assembly, a dust collection port formed at a bottom end of the sub-passageway, and a baffle integrally formed within the main passageway to divide the main passageway into a front section and a rear section. One side of the main passageway communicates with the sub-passageway, and the main passageway has a joint port and an exhaust port opposite to the joint port. The joint port and the dust collection port of the muffler assembly connect to the outlet port and joint port of the air sander, respectively. The baffle is formed with a predetermined number of thin holes to communicate the front section with the rear section, wherein the rear section of the main passageway communicates with the sub-passageway.

Abstract: An in-line profile sander is disclosed. The in-line profile sander includes a sander housing configured to be grasped by a user. A plurality of interchangeable profile sanding pads can be mounted at a head of the housing. The sander includes an in-line oscillating mechanism for moving the profile sanding pads in a linear oscillating motion.

Abstract: The powered oscillating hand tool is provided having a first drive shaft 7 and a bearing 15 mounted eccentrically relative to the first drive shaft 7. A second drive shaft 14 carries a mounting platen 90 by means of one or more flexible legs 80. The first and second platens are interchangeably mountable on the second drive shaft 14 and a brake means is provided on the mounting platen 90 to restrain the speed of rotation of a selected first or second platen.

Abstract: A grinding power tool including a motor-driven grinding plate (2) supported in the housing (1) and having a plurality of suction openings (3) connected by a suction channel (4) provided in the housing (1) with a vacuum source (5), and at least one suction relief valve associated with the suction channel (4) for controlling pressure in the suction channel (4).

Abstract: A surface abrader apparatus includes a casing, a motor mounted on the casing, one or more working tools, and an operating mechanism mounted to the casing and supporting the working tools outside of the casing. The operating mechanism is drivingly coupled to the motor for causing an impacting movement of the working tools against a workpiece in response to selected operation by the motor. The operating mechanism includes one or more elongated shafts reciprocally mounted in the casing parallel to one another and having same one ends extending from the casing, a drive shaft rotatably mounted in the casing between and parallel to the shafts and rotatably driven by the motor, and coil springs and cam elements for causing lifting and releasing of the shafts and the working tools, such as impact abrading heads, mounted on the same one ends of the shafts to produce impact movements of the tools.

Abstract: A hand-guided grinding device (1) carries out a planar grinding motion and is mounted on a motor-driven grinding disk (2). The grinding disk (2) is mounted on a shaft, extending outwardly from a central housing (4) of the device, located axially above the grinding disk (2) and serving to accommodate a transmission unit and a motor. The grinding device (1) has a main handle (6) and an additional handle (8) for the two-handed operation of the device (1), and the handles (6, 8) project essentially laterally from the central housing (4) of the device at two mutually opposite sides of the central housing (4) of the device. The central housing (4) of the device has a housing section (9), which axially adjoins the grinding disk (2), and projects laterally outwardly from the central housing (4) of the device at least in certain regions and is equipped with a gripping surface (10) for one-handed operation.

Abstract: In a grinding body (1) for an electric grinding tool, in particular a delta, eccentric or oscillation grinder, having a carrier plate (2), on which a granular abrasive (3) is disposed and which can be connected to a base plate of the grinding tool, a markedly higher material-removal capacity and a markedly longer service life are attained by providing that the carrier plate (2) comprises a steel band (12), in particular a stainless-steel spring band, and the granular abrasive (3) is a hard-metal granular abrasive (11).

Abstract: A quick release system for an oscillating spindle sander comprises a linearly elongated shaft inserted and housed within a cavity of a sanding drum. A top washer comprising a central aperture and a pair of downwardly projecting prongs aligned about a circumference of the central aperture and insertable into notches formed within the top of the shaft. A pin assembly is insertable into the shaft to impinge the top washer with the sanding drum, thereby compressing an abrasive sanding sleeve placed onto said sanding drum and permitting sanding of an object. The pin assembly may be released and removed from the shaft, permitting removal of the top washer. Upon removal of the top washer, the abrasive sanding sleeve may be removed and disposed of, or inverted so as to use the unused portion of the sanding sleeve, and thus extending the useful life of the sleeve.

Abstract: A power grinder, in particular an oscillating grinder (10), having a housing (12) and a grinding sheet holder (14), on whose working face (15) a grinding sheet (16) to be received is braced, and its reception is effected by means of clamping means (20, 23) that lock opposite grinding sheet ends (17, 19) to the grinding sheet holder (14), is made easier to operate, and its machining capacity is improved, by providing that for equipping it with the grinding sheet, the clamping means (20, 23) are movable jointly with a grinding sheet end (17) clamped to them away from the opposite, likewise clamped grinding sheet end (19), so that the latter is locked, while under tensile stress.

Abstract: A grout removal tool includes an adapter having a replaceable cutting blade mounted thereon. The adapter is configured to be installed within a common reciprocating saw. The adapter has a proximal attachment end for attachment to the saw, an elongated proximal leg extending from the proximal attachment end, and an elongated distal leg extending from the proximal leg at an angle to terminate in a distal end whereupon the cutting blade is attached. When the proximal attachment end of the adapter is installed within the reciprocating saw, the cutting blade reciprocates in a parallel plane beneath the plane in which the proximal leg reciprocates. When the cutting blade is reciprocated across a grouted work surface, it results in a high rate of grout removal with low dust dispersion.

Abstract: A tool for shaping curved surfaces on a workpiece, in particular upper curved surfaces of the forward and aft rails of a gas turbine engine shroud section. The shaping tool includes a base member for securing the workpiece and a shaping member movable relative to the base member and having one shaping element for each curved surface of the workpiece. The shaping tool also includes cooperating follower and guide members to guide the shaping member through a path as the shaping member is moved relative to the base member such that each of the shaping elements of the shaping member shape the respective curved surfaces of the workpiece. The tool can be used in a method for shaping the curved surfaces of the workpiece where the shaping member is moved in a path such that each of the shaping elements of the shaping member shape the respective curved surfaces of the workpiece and repeating this step until the desired degree of shaping of the curved surfaces of the workpiece is achieved.

Abstract: A fastening device for a polishing paper cloth of a portable polishing machine. The device comprises an attaching portion which can be detachably attached to a base plate of the polishing machine and a fastening device main body for winding the polishing paper cloth thereon to engage therewith. Multiple concave grooves, which are continuous in the winding direction of the polishing paper cloth in parallel, and a cavity portion formed inside are provided. Therefore, by giving flexibility to the main body to allow it to be deformed in many directions, it is possible to prevent a reaction to the operator due to oscillation of the polishing machine generated during the polishing and to improve a discharging function for the polishing waste to the outside by allowing the polishing waste generated during the polishing to easily intrude in the concave grooves.

Abstract: A manually operated sander including a motor-driven grinding plate for treating a workpiece, and a device (2) for releasably clamping abrasive paper to the grinding plate, with the clamping device (2) having a clamping surface element (9) and a clamping stirrup (11) eccentrically pivotable with respect to the clamping surface element (9) for securing at least one end region (16) of the abrasive paper (3), with a gap (S) between a pivotal path (B) of the clamping stirrup (11) and the clamping surface element (9) substantially closing toward a region of the clamping surface element (9) that cooperates with the clamping stirrup (11) for clamping the at least one end region (16) of the abrasive paper (3).

Abstract: An in-line profile sander is disclosed. The in-line profile sander includes a sander housing configured to be grasped by a user. A plurality of interchangeable profile sanding pads can be mounted at a head of the housing. The sander includes an in-line oscillating mechanism for moving the profile sanding pads in a linear oscillating motion.

Abstract: An electrical power grinder, in particular an eccentric grinder, is disclosed that has a grinding wheel (14) and a grinding-medium holder (23), held on the underside thereof, of soft material. For the sake of reducing wear of the grinding-medium holder (23) at its outer edge and lengthening the service life of the grinding-medium holder, the grinding wheel (14) is provided with an edge guard, which has a guard member (30) encompassing the grinding wheel (14) that protrudes, in the plane of the grinding wheel, past the outer contour of the grinding-medium holder (23) (FIG. 3).

Abstract: A surface abrader apparatus includes a casing, a motor mounted on the casing, one or more working tools, and an operating mechanism mounted to the casing and supporting the working tools outside of the casing. The operating mechanism is drivingly coupled to the motor for causing an impacting movement of the working tools against a workpiece in response to selected operation by the motor. The operating mechanism includes one or more elongated shafts reciprocally mounted in the casing parallel to one another and having same one ends extending from the casing, a drive shaft rotatably mounted in the casing between and parallel to the shafts and rotatably driven by the motor, and coil springs and cam elements for causing lifting and releasing of the shafts and the working tools, such as impact abrading heads, mounted on the same one ends of the shafts to produce impact movements of the tools.

Abstract: An extended-life cutting blade is adapted for mounting on a hand-held cutting tool in multiple operative orientations. A single cutting blade may provide up to four independent shear edges, each of which has a useful life. The blade can be easily changed from an orientation adapted to cut a workpiece with one shear edge to a different operative orientation adapted to cut with a different shear edge by selecting an appropriate mount on the blade.

Abstract: The powered oscillating hand tool is provided having a first drive shaft 7 and a bearing 15 mounted eccentrically relative to the first drive shaft 7. A second drive shaft 14 carries a mounting platen 90 by means of one or more flexible legs 80. The first and second platens are interchangeably mountable on the second drive shaft 14 and a brake means is provided on the mounting platen 90 to restrain the speed of rotation of a selected first or second platen.

Abstract: Apparatus for sharpening a razor blade with a motor actuated sharpening member mounted in a housing with a slot for receiving the razor head and a cradle assembly for engaging the distal end of the razor handle to hold the razor head in the slot. A carriage assembly holds the sharpening member opposite to the slot with its sharpening surface engaging the cutting edge of a razor blade secured in the razor head. A drive assembly driven by a motor operated by a timing circuit causes repetitive movement of the sharpening surface for a predetermined period of time.

Abstract: A tool for the removal of paint and putty includes a semi-circular assembly housing including a semi-circular rigid collar. The tool also includes a disk-like abrading assembly rotatably and co-axially mounted within the semi-circular collar of the housing, the assembly including rigidly disposed abrading elements projecting both axially and radially, the assembly defining a plane of rotation. The tool further includes a motor for high speed rotation of the assembly, the motor located externally of the housing. The tool also includes bearings for establishing a fixed axial cutting depth relative to a primary work surface positioned thereagainst, in which the bearings function as a buffer between the abrading assembly and the work surface to thereby improve control and mobility of the assembly relative to the primary work surface. A platform is disposed between the assembly housing and the motor, in which the platform is preferably co-planer with the plane of rotation of the abrading assembly.

Abstract: A fastening device for a polishing paper cloth of a portable polishing machine. The device comprises an attaching portion which can be detachably attached to a base plate of the polishing machine and a fastening device main body for winding the polishing paper cloth thereon to engage therewith. Multiple concave grooves, which are continuous in the winding direction of the polishing paper cloth in parallel, and a cavity portion formed inside are provided. Therefore, by giving flexibility to the main body to allow it to be deformed in many directions, it is possible to prevent a reaction to the operator due to oscillation of the polishing machine generated during the polishing and to improve a discharging function for the polishing waste to the outside by allowing the polishing waste generated during the polishing to easily intrude in the concave grooves.

Abstract: A finishing orbital sander (1) includes a main body (2) and a base (12) provided below the main body. Provided between the main body and the base are a plurality of foot assemblies (22). Each assembly in turn includes a cylindrical or columnar foot (23) made of aluminum and a pair of rubber O-rings (25) at both ends of the cylindrical foot. Each foot additionally includes reduced diameter sections (24) at both ends, where the O-rings are disposed. The reduced diameter sections (24) are fitted in the O-rings and placed in recessed seats (26) provided in opposing surfaces of the main body (2) and the base (12), thus elastically supporting the aluminum feet (23) in the axial direction thereof. The axial dimension of each reduced diameter section (24) is made no longer than the thickness (i.e., the axial dimension) of the O-ring (25), so that the tip end of the reduced diameter section does not exceed or project from the axial outermost end of the O-ring.

Abstract: A rotary orbital sander includes internal suction channels connecting with a suction housing connectable with a vacuum source for removing sanding waste during sanding. A dual weight balancing arrangement includes oppositely extending weights in planes spaced above a sanding pad to completely balance the eccentric rotary pad with the separately located weights.

Abstract: A device for use with air and electric powered and manual minisaws all of which are used with reciprocating action, to extend the functionality of the saw. The device is a sanding block having a vertical arm attached to a mounting plate on a first side of the plate. A sanding member having a top surface is glued or otherwise attached to the second side of the plate. The mount plate may be coextensive with the top surface of the sanding member. The arm includes an insertion section dimensioned to be engaged by the slot in the chuck of the saw and which insertion section is spaced from said mount plate and the rear edge of which is disposed rearward of said mount plate.

Abstract: This invention provides a fixture for an abrasive cloth paper in which a surface fastener does not have to be bonded prior to fixing of the abrasive cloth paper onto the fixture and in which hook-shaped engaging elements are disposed accurately at portions directly related to polishing by an abrasive cloth paper fastening portion of the fixture with precedence. A fixture made of synthetic resin comprises a mounting portion which is engaged with/disengaged from a base plate of a sander and a fastening portion on which an abrasive cloth paper is wound and fastened. In the fastening portion, a plurality of surface fastener engaging element rows which are parallel to a direction of winding of the abrasive cloth paper are formed integrally so as to form a fastening surface. A hollow portion is formed in the fastening portion.

Abstract: A manually operated sander including a motor-driven grinding plate for treating a workpiece, and a device (2) for releasably clamping abrasive paper to the grinding plate, with the clamping device (2) having a clamping surface element (9) and a clamping stirrup (11) eccentrically pivotable with respect to the clamping surface element (9) for securing at least one end region (16) of the abrasive paper (3), with a gap (S) between a pivotal path (B) of the clamping stirrup (11) and the clamping surface element (9) substantially closing toward a region of the clamping surface element (9) that cooperates with the clamping stirrup (11) for clamping and end region (16) of the abrasive paper (3).

Abstract: A sanding block attachment for a jig saw including a block portion adapted for securement to the reciprocating blade of the jig saw. The block portion has a generally rectangular configuration. The block portion is defined by a long front face, a long rear face, a short top face, a short bottom face, and long opposed side faces. A sheet of sandpaper is removably secured to the long front face of the block portion.

Abstract: A material removing tool, such as a cutting or grinding tool, adapted to be oscillated by the output shaft of a manually operable motor-driven apparatus, is provided with at least one elongated cutting edge defined by teeth or analogous cutting elements arranged in at least one at least substantially straight linear array.

Abstract: This invention relates to reciprocating saws, and to abrasive sanding attachments and blades for such saws, to facilitate the oscillating, the reciprocating sanding, and the shaping of straight, curved, concave or convex surfaces, with abrasive cutting surfaces. The invention described herein fits and mounts in blade holders currently in use on scroll saws, and is designed to take advantage of pin-end and plain pinless-end saw blade mounting methods as applied to holding an abrasive member. This invention increases the versatility and use of the scroll saw and related C-shaped saws, as tools for use in intricate, delicate, and controlled woodworking, metalworking, and finishing. Methods for making abrasive member holders 40, 68, 74, 84, 104, 112, 124, 142, and 160 are disclosed. The holders can be mounted on pin-end blade or pin-less blade scroll saws using abrasive member head, extenders and pivot heads.

Abstract: An in-line sander comprising a sander body which houses a motor coupled to an in-line oscillating mechanism. The in-line oscillating mechanism is adapted and configured to move a sanding pad in a linear oscillating motion. A corner or detail pad has a substantially flat lower surface and a substantially pointed front portion bounded laterally by two substantially-linear corner-sanding edges having an included angle of less than 90 degrees. A forward end of this substantially pointed front portion of the preferred corner or detail pad protrudes ahead of a front end of the sander body throughout the linear oscillating motion of the pad. The front portion of the preferred corner or detail pad has particular application for sanding into corners of a carcass.

Abstract: A hand scaler sharpener unit adapted to sharpen a hand scaler with a grindstone for restoration of the hand scaler, including a base member having a base surface slanted at an angle to a level line, a grindstone mounting member for mounting a grindstone thereon, a grindstone driving means for reciprocatingly moving the grindstone mounting member along the base surface, as well as a hand scaler sharpening apparatus including this hand scaler sharpener unit and a hand scaler securing unit for securing a hand scaler generally vertically during operation of the sharpener unit.

Abstract: An apparatus for cutting fiber-cement siding. A fiber-cement siding cutting tool in accordance with the invention may have a hand-held motor unit with a housing, a motor inside the housing, and a switch operatively coupled to the motor to selectively activate the motor. A head having a casing may be attached to the housing of the motor unit The head may have a reciprocating drive assembly coupled to the motor. The hand-held cutting tool also has a blade set with first and second fingers attached to either the casing or the motor housing, and a reciprocating cutting member between the first and second fingers. The first finger may have a first guide surface and a first interior surface. Similarly, the second finger may have a second straight guide surface and a second interior surface. The reciprocating cutting member has a body and a blade projecting from the body.

Abstract: An attachment for an oscillatory sanding or abrading device has a pair of flexible support members for supporting the sanding or abrading material. The initial radius of curvature of the flexible support member may be adjusted by a spring loaded adjustment mechanism. An opposing pair of circular recesses formed in opposing faces of the flexible sheets allows for replacement of the springs. The recesses can be formed at both ends of the flexible sheets. Adjustment of the initial radius of curvature is accomplished by inserting springs of varying sizes into one or both pairs of recesses. The radius of curvature of the flexible support member during the sanding process is then a function of the spring constant of the spring used and the applied pressure. The device thus uses a series of discrete adjustments each of which covers a range of contoured shapes.

Abstract: A fixing member is provided for fixing a front end section to the rest of a base plate. The fixing member is provided with a surface fastener which is integrally molded with the fixing member.

Abstract: A sanding apparatus (1) is provided with a platen (2) formed of several layers and with a flat surface to which an abrasive sheet is attached. The platen (2) has a peripheral edge (7) with at least one point (4). A conductive means (18, 20) is provided through the layers of the platen (2) to act as a heat sink adjacent to the point (4) to remove heat from the surface point (4).

Abstract: An abrading blade having a shank portion configured for attachment to a conventional reciprocating saw and a cutting edge extending along its lower end. The cutting edge is oriented to be substantially parallel to a line of reciprocation defined by the reciprocal motion of the saw's reciprocating spindle. The blade's cutting edge is spaced from the line of reciprocation a distance sufficient to permit clearance of the saw with the work surface while the blade is being used to abrade in a direction substantially parallel to the line of reciprocation along the work surface.

Abstract: A surface treating device is provided for rotating a primary surface treating arrangement supplied with a surface treating material relative to a working surface. A driving mechanism is provided for rotating the primary surface treating arrangement including a driven output tube operably connected to the primary surface treating arrangement. In the preferred embodiment, an auxiliary surface treating arrangement is spaced inwardly of the output tube and is non-rotatably mounted on the driving mechanism. The auxiliary surface treating arrangement includes a manually actuated pump slidably mounted relative to the output tube for controllably delivering a supply of the surface treating material to the primary surface treating arrangement.

Abstract: A linear sanding apparatus, for providing a linear reciprocating sanding action, and having a support assembly, a drive shaft, and having a angled drive plate on the shaft, and a motor for rotating the shaft, two transmission devices coupled to the drive plate, and operable by rotation of the drive plate, to reciprocate along linear paths in opposite directions side by side to one another, and first and second sanding plates connected to respective transmission devices, and movable in unison with movement of the devices to and fro, side by side to one another along reciprocating linear parallel paths in opposite directions.

Abstract: This invention relates to reciprocating saws, and to abrasive sanding attachments and blades for such saws, to facilitate the oscillating, the reciprocating sanding, and the shaping of straight, curved, concave or convex surfaces, with abrasive cutting surfaces. The invention described herein fits and mounts in blade holders currently in use on scroll saws, and is designed to take advantage of pin-end and plain pinless-end saw blade mounting methods as applied to holding an abrasive member. This invention increases the versatility and use of the scroll saw and related C-shaped saws, as tools for use in intricate, delicate, and controlled woodworking, metalworking, and finishing. Methods for making abrasive member holders 40, 68, 74, 84, 104, 112, 124, 142, and 160 are disclosed. The holders can be mounted on pin-end blade or pin-less blade scroll saws using abrasive member head, extenders and pivot heads.

Abstract: A main body containing an electric motor reciprocally driving a rigid longitudinal extension which is frictionally suspended within a graspable sleeve may be held to guide a selected abrasive tool head coupled to the front end of the extension. Power may be supplied by a battery, rechargeable or replaceable, or by alternating current through a cord. A vacuum connected to a sanding head having a porous pad backed by an airtight manifold and attachable to the main body may run on alternating current or a battery. The sleeve may be connected to the main body to provide a continuous uninterrupted exterior. The speed may be varied with use of a variable resistor. An appropriate length stroke is obtained with a sufficiently large diameter driven disc pivotally connected to the extension with a rigid link arm. The tool may be used for powered sanding, scraping, or scrubbing with a wire brush, a bristle brush or an absorbent pad.

Abstract: A power sander comprising an oscillating drive for oscillatingly driving a sanding tool about an axis fixed with respect to a housing is disclosed. The sanding tool comprises a sanding plate arranged on the sanding tool and having at least two side edges which converge in at least one corner and are arranged symmetrically with respect to a center point. A receptacle for mounting the sanding plate on the drive shaft is arranged on the sanding plate eccentrically with respect to the center point.

Abstract: A reciprocating assembly for moving an abrasive element over a workpiece. The reciprocating assembly utilizes a piston arrangement operated by pressurized fluid wherein the abrasive element is extended over the workpiece at one rate and is retracted along the workpiece at another rate.

Abstract: A machine for continuously advancing sandpaper on a palm sander has a rear clamp bracket for holding a roll of sandpaper substantially longer than the sanding surface of the palm sander and stabilizing one end of a section of the sandpaper and a front clamp bracket for securing the opposite end of a section of the sandpaper. The machine also has a means for attaching the front and rear clamp brackets to an existing palm sander. The front clamp bracket also comprises a cut-off bracket to separate used sandpaper.

Abstract: An in-line sander comprising a sander body which houses a motor coupled to an in-line oscillating mechanism. The in-line oscillating mechanism is adapted and configured to move a sanding pad in a linear oscillating motion. A corner or detail pad has a substantially flat lower surface and a substantially pointed front portion bounded laterally by two substantially-linear corner-sanding edges having an included angle of less than 90 degrees. A forward end of this substantially pointed front portion of the preferred corner or detail pad protrudes ahead of a front end of the sander body throughout the linear oscillating motion of the pad. The front portion of the preferred corner or detail pad has particular application for sanding into corners of a carcass.

Abstract: A motor driven hand tool has an oscillatory work tool carrier (10) that is attached by means of elastic supporting members (11 to 14) to the housing. Each elastic supporting member (11 to 14) includes a one-piece plastic part consisting of approximately rod-shaped spring elements (20 to 25) and transversely extending base parts at opposite ends of the spring elements. At least one damping part (29) may be provided extending between the spring elements (20 to 25) and bears on or is supported between both base parts (15,26). The base parts of the one-piece plastic part contact on respective facing surfaces of and are formed for releasable attachment with the hand tool housing and the work tool carrier.

Abstract: A grinder including a power drive unit having a driving shaft and a bevel gear fixedly mounted on one end of the driving shaft, and a grinding unit coupled to the power drive unit, the grinding unit including a grinding bit and a transmission mechanism coupled between the grinding bit and the bevel gear of the power drive unit, wherein the grinding unit has a retaining hole and a coupling flange disposed at a rear side thereof at different elevations; the power drive unit has a front coupling slot at a bottom side thereof which receives the coupling flange of the grinding unit, a pair of lugs raised from the periphery at a top side thereof, a lever pivoted to the lugs, and a hook pivoted to the lever and forced by the lever to hook in the retaining hole of the grinding unit. The transmission mechanism of the grinding unit can be alternatively made in a first form to turn the grinding bit in X-axis, a second form to turn the grinding bit in Y-axis, or a third form to reciprocate the grinding bit.

Abstract: In a hand-held electrical grinder with a tool holder (22) driven by a rotating eccentric plug (20) which, for receiving a grinding tool has a quick-action locking device (24) with locking elements (40, 41) fixed on the tool and tool holder sides and corresponding with each other, the locking elements (40) on the tool side are formed, on the one hand, by hooks (42) disposed on a circular line and, on the other hand, the locking elements (41) on the holder side are realized by means of a spring wire (43), which is bent in the shape of a ring, in order to transmit a greater output from the tool holder (22) to the (10). The spring wire (43) has a number of radially inward directed indentations (431) corresponding to the number of the hooks (42) on the tool side, which extend behind the hooks (42) on the tool side for locking the grinding tool (10) in.

Abstract: An apparatus for cutting fiber-cement siding. A fiber-cement siding cutting tool in accordance with the invention may have a hand-held motor unit with a housing, a motor inside the housing, and a switch operatively coupled to the motor to selectively activate the motor. A head having a casing may be attached to the housing of the motor unit. The head may have a reciprocating drive assembly coupled to the motor. The hand-held cutting tool also has a blade set with first and second fingers attached to either the casing or the motor housing, and a reciprocating cutting member between the first and second fingers. The first finger may have a first guide surface and a first interior surface. Similarly, the second finger may have a second straight guide surface and a second interior surface. The reciprocating cutting member has a body and a blade projecting from the body.