Abstract: In accordance with the present invention, there is provided a profiler device having a linear drive mechanism with enhanced tool holder support to effectively guide the substantially linear reciprocating movement of the tool holder so to maintain accuracy during machining operations and to extend the life of the tool and the device. The linear drive mechanism includes a reciprocating sleeve guided for substantially linear movement in a main guide sleeve, which is fixed to a profiler housing. The main guide sleeve includes a square socket formed in one end for receiving a square end of the tool holder. The surfaces of the square socket and the square end slidably engage one another for guiding and supporting the tool holder. The square end of the tool holder also includes a central bore which receives with a friction fit one end of reciprocating sleeve for being driven linearly with the reciprocating sleeve.

Abstract: A vibration stabilizer is provided for a power tool such as a sander or the like which has a pivotally oscillating driveshaft for supporting a tool head. The tool is provided with an elongate body having an internal cavity aligned along a longitudinal axis for receiving a drive motor therein. A driveshaft is pivotally supported upon the elongate body rotatable about a pivot axis. The drive motor operatively engages the driveshaft to cause the driveshaft to pivotally oscillate within a limited angular range when the drive motor is energized. Relative vibration between the tool head and the elongate body is minimized by an elastic ring which extends about the driveshaft and is interposed between the tool head and the elongate body. The elastic ring is loaded in compression axially biasing the tool head and the attached driveshaft in a direction away from the elongate body.

Abstract: A vacuum attachment assembly is provided for use in combination with a corner sanding tool comprising a replaceable sander block of resilient foam material having a transverse cross section of the form of an isosceles triangle. The block is removably mounted on a carrier member which is inserted into a close-fitting chamber within the block body through a narrow entrance passage, the carrier being connected to a handle. The vacuum attachment comprises a C-shaped body having two parallel end portions extending from a central portion, and the sander block is of sufficient length that it must be compressed somewhat longitudinally for it to be inserted into the assembly, which is thereby frictionally retained under the resilience of the sander block body material. The attachment central portion has two parallel side walls which are butted by the resilient sander block to establish an air-tight, air-receiving plenum chamber between the attachment member and the sander block.

Abstract: A power tool, which is preferably configured as a right-angle grinder, has a motor-driven hollow spindle to drive a tool, which is fastened between a clamping flange and a counterflange by means of a quick clamping device via a tension spindle, coaxial with the hollow spindle, that is tensioned in the axial direction by means of elastic elements and is displaceable in the axial direction relative to the hollow spindle, by means of a clamping lever, between a clamped position in which the tool is nonrotatably retained between the flanges, and a released position. The clamping lever is mechanically coupled to the motor switch by means of a link rod in such a way that the clamping lever can be moved into the released position only when the motor is switched off. This rules out improper operation and any potential damage to the power tool.

Abstract: A portable machine for performing cuts, particularly rectilinear or curvilinear cuts, in stone, marble, granite and the like. The machine comprises a supporting member arranged for movement over the top surface of stone or the like. A frame is connected to the supporting member through a connecting block. The frame supports motor means and transmission means for driving a cutting tool. A handle is provided for moving the machine over the surface of stone or the like. The machine comprises means for adjusting the sinking of the cutting tool into the stone. The supporting member being provided on the surface towards the stone with a plurality of rolling-ball bearings, allowing for the free movement of the supporting member. The frame and cutting tool are free to follow a rectilinear or curvilinear path. The connecting block cooperates with the coupling means for allowing a free rotation of the frame with respect to the supporting member.

Abstract: An ergonomic, hand-held power tool (10) is disclosed having a housing (12) formed to have a main body portion (14) having a cavity (32) and a handle portion (16) coupled to the main portion (14). The main body portion (14) has a first longitudinal axis (66). The handle portion (16) has a second longitudinal axis (68) formed to be at an acute angle (70) with respect to the first longitudinal axis (66). A flexible material (28) may be attached to the handle portion (16) or used to form an exterior coating on the housing (12) to help minimize any vibration transferred to the operator's hand.

Abstract: A portable abrading tool including a tool body and a head which is movable relative to the tool body by a motor and is adapted to carry a sheet of sandpaper or other element for abrading or polishing a work surface, with the head containing a first passage or passages for conducting a flow of incoming water through the interior of the head to the work surface, and an additional passage or passages for conducting a suction induced flow of intermixed air, water and abraded particles from the work surface through the interior of the head in isolation from the incoming water and without flow of the intermixed air, water and particles through the first passage or passages.

Abstract: A rail grinding machine for grinding rails of a track includes a machine frame with rollers for support on both rails of the track and a swivel drive for swingably mounting a carrier frame to the machine frame for rotation about a pivot axis which extends longitudinally in direction of the track. A grinder is adjustably secured to the carrier frame in an area of one rail, with a drive motor for supplying energy to the swivel drive and the grinder being secured to the machine frame at an area distant to the carrier frame. The distance of the carrier frame and its pivot axis from a support roller located opposite to the grinder is reducible by a length compensation unit which includes a pressure-exerting element for applying in opposition to the distance reduction a force by which the grinder is pressed against a rail head inner flank of the rail being ground.

Abstract: A hand-held polisher which comprises a body, an electric motor with a motor shaft held inside the body for driving a polishing implement mounted on the body, and a switch on the body for controlling the operation of the motor. The body has a first part for accommodating a battery cell for electrical connection to the motor under the control of the switch and a second part accommodating the motor. The second body part has a front opening through which the polishing implement is insertable into the body for mounting thereon. A stationary bearing is located in the first body part behind the front opening, in a co-axial position relative thereto, for supporting the polishing implement.

Abstract: An improved pavement treatment apparatus and method are disclosed, for example for concrete and asphalt saws, which may include a vacuum apparatus for removing water and slag. The apparatus also may include an improved blade guard and a pump system for removing the collected water and slag solution.

Abstract: A grinder has a grinding member. The grinder includes a rotatable spindle having an engagement portion. A first flange engages the engagement portion of the spindle. The first flange and the engagement portion of the spindle define a given play therebetween in a direction of rotation. The grinding member is held between the first flange and a second flange. A lubricant solid material is provided between the first flange and the engagement portion of the spindle.

Abstract: A grinding head mounting structure including a tubular eccentric base shaft coupled to the driving shaft of the grinding machine by a screw member, an abrasive plate holder base having a bottom coupling portion coupled to the tubular eccentric base shaft by a mandrel and a triangular top platform fixed with an abrasive plate, a swinging member having an arched base movably mounted around a circular block on the machine base of the grinding machine by a split ring and a clamp and a rectangular top coupling portion coupled to a rectangular block on the abrasive plate holder base.

Abstract: An apparatus forming a portable, hand-operated machine (1, 1', 1"), having a circular cutting wheel (4) or saw blade (4") which is rotatable about a center of rotation (5, 5"), comprises a double-armed holder (9) with a rear arm (20) which, at its rear, free end (27), is connected to the machine at a first hinge, rotatable about a first axis of rotation (18, 18a, 18b, 18") parallel to the center of rotation of the cutting wheel or the saw blade, and, at the other end, is connected rotatably, by means of a toggle joint (22), to a front arm (21) which in turn is connected rotatably, at its front, free end, to a securing device about a second axis of rotation at a second hinge, for rotatable anchoring of the holder and, thus, of the machine on the object which is to be cut or sawn.

Abstract: An output axis of a motor has an eccentric portion, a vibratory arm is vibratably supported at its central portion, connecting section of said vibratory arm with the eccentric portion is formed in shape of two crotches, the eccentric portion and the vibratory arm are connected to each other in a manner that the eccentric portion is inserted between the two crotches of the vibratory arm, thereby rotational movement of the output axis of the motor is converted into vibrational movement of the vibratory arm, and at least one of contact portion formed on the outer circumfrential surface of the eccentric portion or contact portions respectively formed on the inside surface of each of two crotches is formed in shape of a curved surface.

Abstract: A sandpaper pad and a pad support of corresponding shape is provided for use with a detail sander. The sandpaper pad and pad support each has a substantially 90.degree. forward corner formed by a pair of facet edges. A pair of outwardly inclined straight side edges extend rearwardly from the facet edges on opposite sides of the pad center line each being outwardly inclined from the center line 10.degree.-30.degree.. When the straight side edges are in use, the forward corner is inwardly offset, thereby minimizing forward corner wear.

Abstract: A miniature motorized hand held dental saw wherein, like with a coping saw, the axis of rotation of the handle of the dental saw is tangent with the outer diameter of the blade. This important characteristic, combined with the use of a flexible blade, enables the operator to change, as needed, the direction of the cut without any snagging or binding effects. The dental saw is composed of a main steel body on which are attached three flanged Teflon.TM. coated bearings that support and guide a 0.004 thick annular diamond coated blade. The rotation of the blade, on these flanged bearings, is created by a drive assembly consisting of two opposite wheels, a drive wheel and a follower wheel, each wheel composed of a hub on which is fitted a neoprene o-ring. The opposite o-rings create an equal pressure on both faces of the blade which they make rotate. The power is transmitted to the assembly by means of a drive cable that is connected to a motor situated in a remote stationary work station.

Abstract: A dust collecting device connectable to a hand held power sanding and/or grinding tool for dislodging, retention and collection of dust particles created by the abrasive process by the power tool. The device includes a flat disc-shaped shroud top having central aperture means formed therethrough for fastener connection to, and output shaft clearance of, the power tool. An upwardly facing exhaust port is also connected to the shroud top for attachment to a vacuum source for collecting particles dislodged by the abrasive process from a work surface. The device also includes a circular brush member defining a somewhat flexible skirt formed of densely spaced bristles dependently extending generally orthogonally from one surface of the shroud top immediately adjacent its circular perimeter. The skirt encircles and encloses a rotating or oscillating abrasive pad connected to the output shaft of the power tool.

Abstract: A device is described for manual assembly and removal of a working disc in a manual tool for machining surfaces. The tool comprises a hub on which the working disc is screw-fastened and that is rotatably held eccentrically by a support casing made to rotate on its own axis by a driving shaft. The device comprises a pushbutton that can be accessed from the outside and that can slide between an at rest position and a position where it engages one of its ends with a mechanical element integral with said hub to prevent the rotation of the hub while the working disc is screwed or unscrewed.

Abstract: The present invention relates to a new and improved manual wet sanding block having means for supplying liquid from an external source through the wet sanding block onto a surface being sanded, a means for wipe drying a newly sanded surface, a flexible hose connected to an adaptor located on the wet sanding block, a sliding sucker fixed on the hose near the body in order to avoid that the flexible hose touch the floor, and a means for hanging up the wet sanding block in order the avoid the rust. The flow of water is first controlled by a regulator located in a water intake but may instantly be started and stopped by the finger of the operator. The water is delivered onto the sanding surface by perforations located under the wet sanding block.

Abstract: An orbital disk grinder comprises a housing, grinding disk which can be applied to a working surface, a motor for moving the grinding disk so that the grinding disk gyrates in a circular orbit and simultaneously rotates about its axis, and speed control means operative for setting a speed of the grinding disk low when a normal force acting on the working surface is low, and high when the normal force acting on the working surface is high, so that a normal force acting on the grinding disk serves as a setting variable of the speed control means.

Abstract: A protective guard for use on a pneumatic tool known as a board file which includes a handle assembly and a board assembly that reciprocates back and forth relative to the handle assembly. The board assembly is held together by a nut and bolt located near each end thereof, and the handle assembly consists of a front handle and a rear handle mounted on a housing. A pinch point exists between a forward end of the housing and the forwardmost nut and bolt that holds the board assembly together. The protective guard is mounted on the handle assembly and prevents injury to an operator by preventing his fingers or the side of his hand from inadvertently slipping into this pinch point. A platform on the protective guard covers the forwardmost nut and bolt as the board assembly reciprocates relative to the handle assembly.

Abstract: A sanding apparatus comprises a sanding member having on a lower end thereof a flat sanding plate, and being able to oscillate a drive unit for oscillating the sanding member; a motion converting means having an oscillating arm, connected to a rotating output shaft of the drive unit, for converting a rotational motion of the output shaft to an oscillation motion; and a connecting means for connecting the oscillating arm of the motion converting means at one end thereof with the sanding member. The connecting means permits an adjustment of a securing angle of the sanding member to the oscillating arm of the motion converting means.

Abstract: A hand tool having a frame which holds interchangeable working heads for scraping ice and other materials, scrubbing and sanding. The frame pivotally carries the working head at one end and has a curved forearm brace at the other end. A hand grip bar is located between the ends of the frame such that the forearm provides force against the brace to hold the working head against the work surface. This creates a leverage effect and relieves stress on the wrist. The pivotal head allows angled or contoured surfaces to be followed without requiring the wrist to flex at different angles. The scraping head has two scraping edges which scrape on both push and pull strokes. An accessory head which is interchangeable with the ice scraping head can hold two metal scraping blades or interchangeable base plates which provide a sanding sheet and a scrubbing pad, respectively.

Abstract: A removable working tool assembly that can be used with a power driven tool having a drive shaft. The removable working tool assembly includes a drive member which can operably connected to the drive shaft and a support member having a tool surface. One of the drive and support members defines a male connection mechanism while the other one of the members defines a female connection mechanism such that the members can be simply connected and disconnected without the need for tools or any other fastener elements. This allows various support members to be easily changed to facilitate the use of different tool surfaces such as sanders, grinders, scrapers or the like.

Abstract: A motor-driven hand-held machine tool with spindle brake, in particular an angle grinder (1), has a device for clamping a disk-shaped tool (33, 83) at a work spindle (7, 67) between an inner flange (29, 79) and an outer flange (31, 81) which has a central bore hole (39, 84) overlapping the work spindle (7, 67) with play. The outer flange (31, 81) can be screwed on a fastening thread (37, 85) against the working rotational direction of the work spindle (7, 67). The hand-held machine tool is designed in such a way that the clamping pressure on the tool (63, 83) between the inner and outer flange (29, 31, 79, 81) can be increased when the work spindle (7, 67) is braked and the tool (33, 83) continues to rotate because of the inertia resulting from the braking so that the tool (33, 63) cannot be loosened from the work spindle (7, 67) unintentionally when the latter is braked.

Abstract: A portable abrading tool including a cylinder body containing a piston which is reciprocable relative to the body under the control of a valve mechanism, a shoe for carrying sandpaper or another abrading element which is reciprocated in a straight line by the piston but oppositely from the reciprocating movement of the piston, a counterweight which is reciprocated essentially in unison with the piston but oppositely from the shoe, and means yieldingly urging the piston and counterweight in a predetermined axial direction and yieldingly urging the shoe in the opposite direction relative to the body to assure that when the operation of the tool is stopped the moving parts of the tool will automatically return to a position in which the valve mechanism is able to deliver fluid to the piston and cylinder structure in a manner recommencing the reciprocating movement.

Abstract: For an eccentric disk sander (1, 101, 161) with a housing, in particular a multi-part housing (3, 103, 9, 109, 162, 165), in which a motor with a motor shaft (16, 116, 170) moves a sanding disk (13, 113, 167) via an eccentric (19, 119, 173), in which arrangement the eccentric (19, 119, 173) carries the sanding disk (13, 113, 167) gyrating about the rotational axis (18, 118, 172) with the eccentricity "e", and simultaneously rotating about the spindle (26, 126, 177), the task of providing a compact, robust, and convenient unit is solved by the hollow shaft (19, 119, 173), open at both ends, being designed with an eccentric hole (25, 125, 176), beyond which an eccentric shaft (27, 127, 178) which carries the sanding disk (13, 113, 167) protrudes from at least one end.

Abstract: The eccentric grinder includes a housing, a fan wheel mounted rotatably in the housing and being rotatably driven in the housing during operation, an eccentric shaft mounted rotatably and eccentrically in the fan wheel, a grinding disk nonrotatably fixed in a central portion thereof with the eccentric shaft and an outer region of the grinding disk being arranged without connection to a remaining group of parts of the grinder and axially spaced therefrom; and at least one exchangeable reversible intermediate plate. Each of the intermediate plates can be mounted nonrotatably on the eccentric shaft between the grinding disk and the housing during operation in one of two positions. To cause a rotary motion of the grinding disk in addition to an eccentric motion one of the intermediate plates is provided with only one toothed or friction rim which is engaged in a fixed toothed or friction rim provided on the housing when the intermediate plate is installed in one of the two positions during operation.

Abstract: A wet sanding tool including a tool body carrying a motor which drives a head carrying a sheet of sandpaper or other abrading element, with the tool being adapted to deliver water to the work surface during a sanding operation, and preferably also to conduct a suction induced flow of air, water and abraded particles from the work surface. The tool desirably includes a shroud disposed about the power driven sanding head for confining the flow of air, water and abraded particles from the work surface, and having a seal element carried by the periphery of the shroud and engageable with the work surface about the head. Water may be delivered to the work surface through a space within the interior of the shroud and through passages in the driven head. Two seal elements between the shroud and head may isolate the flow of incoming water from the outgoing flow of air, water and abraded particles.

Abstract: A power tool, especially a handheld sander, is described, possessing a motor-driven drive shaft that can be alternatively coupled either by means of an oscillation drive to an oscillatory tool drive shaft, or by means of a rotary drive to a rotary tool receptacle coaxial with the oscillatory tool drive shaft. Switching is provided by a switching element, in a first switch position of which the drive shaft is driven in an oscillating manner about the lengthwise axis of the oscillatory tool drive shaft, with a small pivot angle and at high frequency, by means of the oscillation drive, which can consist for example of an eccentric element on the tool drive shaft and a pivot element guided slidingly thereon and fastened on the tool drive shaft. In the second switch position of the switching element, however, the working engagement of the oscillation drive is abolished, and the tool receptacle is rotationally driven by the drive shaft by means of a bevel gear linkage.

Abstract: The invention is basically an extruded or injection molded plastic part that is designed to fit on all drill or hand held sanders. The device has a C-shaped bracket of the size and length of an average aerosol can. The C-shaped bracket is adapted such as the aerosol can can be pressed through the opening and snapped in placed within the C-shaped cylindrical structure. In one embodiment of the invention the C-shaped bracket is attached to a rectangular base that is adapted to fit on the top of a hand held electric power sander. The base is either clipped or bolted to the top of the sander. In another embodiment of the invention the C-shaped bracket is attached to a much smaller rectangular base. This rectangular base has an axle running lengthwise through the base that is aligned slightly off center so that when the axle turns the C-shaped bracket will oscillate. The axle is adapted to fit within the chuck of an electric drill.

Abstract: Providing an oscillating tool for sanding a surface. The tool having a body defining an internal cavity which has a motor located therein. The motor has a motor shaft oriented in parallel alignment with the body. A crank is affixed to the motor which has a crank pin projecting therefrom. A lever arm is pivotably affixed to the body for rotation about a pivot axis generally perpendicular to the motor shaft. A lever arm cooperates with the crank pin to cause the lever arm to cyclically pivot back and forth in response to rotation of a motor shaft. A pad support is adapted to receive a work member. The planar pad support is affixed to the lever arm at a location spaced apart from the pivot axis and oscillates therewith. The pad support is provided with a substantially 90.degree. forward corner formed by a pair of facet edges. A pair of outwardly inclined straight side edges extend rearwardly from the facet edges on opposite sides of the pad center line.

Abstract: A saw (10) is provided comprising a frame (20) containing a saw blade (22) and a fluid motor (24), and a handle (28) connected to the frame (22) incorporating means (36b) for connecting to a fluid supply and throttle means for controlling the fluid supply, wherein at least the portion of the handle (28) incorporating the throttle means is releasably connected to the frame (22) or the remainder of the handle so that the throttle means can be relocated elsewhere in the fluid supply. Preferably, the saw (10) further comprises a trolley (40) on which the frame (22) is releasably mountable so that the saw (10) can be operated either as a floor saw or a hand saw. The handle portion (28) can be relocated to the handlebar (50) of the trolley (40) to give the operator direct control over the fluid supply. Alternatively, separate throttle valves can be supplied on the saw (10) and the trolley (40) to achieve the same object.

Abstract: An eccentric disk grinder has a housing, a motor accommodated in the housing and having a shaft provided with an eccentric member, a first bearing supporting the shaft, a grinding disk eccentrically, circulatingly and rotatingly driven by the motor through the shaft, and a second bearing in which the grinding disk is rotatable relative to the shaft about an axis of the eccentric member. The second bearing includes at least one first bearing which takes up substantially radial forces and supports at least one of the shaft and the eccentric member at its end facing the grinding disk. The bearings also have at least another second bearing which takes up substantially axial forces and supports at least one of the shaft and the eccentric member at its side facing away from the grinding disk.

Abstract: A flexible polyurethane foam cylindrically shaped sanding device (1) manufactured from formulas of abrasive material, can be permanently surfaced with an abrasive material or layer and can be used in conjunction witch abrasive sheets.The tube sheet (4) can be manufactured from wet or dry type abrasive sheets, perforated to allow for water penetration for wet sanding. The tube sheet is assembled into tube form by connection of the opposite edges of same abrasive sheet by fastening same sheet edge to edge by the adhesive tape (31) on back side of sheet,The sanding device is mountable to a pole by the mounting rod (81 ) which is run through mounting apparatus fork, through the sanding device center sleeve (21 ) and into the opposite threaded hole or inserted nut (82) or disc nut (89).The mounting apparatus (84) is fastened to external pole (86) by screwing same pole into fitting on mounting apparatus.

Abstract: In an electric hand machine tool, particularly an angle grinding machine, for the purpose of ergonomic handling the handle, together with the switch bar, is designed to be rotatable, relative to the tool mounting on the gear head (11). For the rapid, problem-free changing of the position of the handle relative to the tool mounting, the handle (12) can be locked against rotation on the motor casing, containing the electric drive, in at least two turned positions by a manually operable locking device, and can be clamped on the motor casing by a manually operable clamp device. In a preferred embodiment the locking device (40) and clamp device are coupled together by constraint and are operated simultaneously by means of a single tightening lever.

Abstract: A reversible rotary sanding power tool of the high speed, hand-held type includes a tool body, a tool head rotatably mounted on the tool body and adapted for replaceably retaining an abrasive disk, and a reversible, high-speed motor within the tool body and to which the tool head is rotatably coupled so as not to become accidentally disengaged upon operation of the power tool in either of the normal or reverse modes of operation.

Abstract: A powered fairing machine having a pair of flexible arms formed in a cross configuration with an abrasive material on their lower surfaces is described. A power source with a rotary output drive is connected to the intersection of the arms to impart a circular motion to them.

Abstract: A removable mounting bracket with an extended sanding foot for attachment to a vibrating or orbital sander which mounts against the platen of a sander to allow for sanding of inside corners and edges.

Abstract: A random orbit sander having a braking member for frictionally controlling the speed of a platen of the sander when the sander is removed from a workpiece during operation. The braking member includes a base portion, an outwardly flaring, relatively thin wall portion and an enlarged outermost edge portion adapted to frictionally engage an upper surface of the platen. The braking member is secured to the bottom of the shroud of the housing via a groove formed in its base portion. The braking member exerts a relatively constant spring force against the upper surface of the platen which limits the rotational speed of the platen to approximately 1200 rpm when the platen is lifted off of a work surface, without significantly degrading the performance of the sander under load.

Abstract: A portable machine tool comprises a drive spindle provided with a tool receiver, a bearing flange which mounts the drive spindle and has a clamping neck, a protective hood which at least partially covers a tool and is held securely against rotation on the clamping neck, and elements for connecting the protective hood and the clamping neck, the connecting elements including a sleeve-shaped plug-on collar provided on the protective hood and having radial projections, an annular groove provided in the clamping neck so that radial projections can engage in the annular groove, and also axial grooves provided in the clamping neck and extending from a free end face of the clamping neck into the annular groove, the axial grooves being arranged and formed so that the radial projections of the plug-on collar can pass through the axial grooves in a plugging-on position which is turned relative to a position of use of the protective hood.

Abstract: A pneumatic rotation grinder comprises a housing (10) with a throttle valve controlled air inlet passage, a rotation motor drivingly connected to an output shaft (12) intended to carry a grinding tool, a safety guard (17) adjustably supported on the housing (10) in a coaxial disposition relative to the output shaft (12), and a lock device (26-28, 33-38) for arresting the safety guard (17) in desired angular positions relative to the housing (10). The lock device (26-28, 33-38) comprises both a latch (26-28) for positive coupling by engagement of teeth (26, 28) of the safety guard (17) relative to the housing (10), and a pressure air activated clamping device (33-38) for frictional arresting of the safety guard (17) relative to the housing (10).

Abstract: A pad sander skirt which flares out over the periphery of the sanding pad and which is coupled to a lower housing so that it swivels about the body of the sander. The skirt and lower housing can be selectively swivelled in a rotational manner to a position desired by the user. A further sander improvement disclosed relates to the protection of a user's hand. Palm-grip random orbit sanders are sometimes configured so that the sanding pad may begin spinning at high speed when the sander is lifted off of the work. To this end, the present application discloses a protective skirt which flares out over the periphery of the pad in a palm-grip random orbit sander. Also disclosed is an improved dust collection system comprising a filter housing formed of a rigid porous material for entrapping dust, as well as a braking system for use with random-orbit sanders.