Abstract: A sander capable of correcting airflow amount comprises a body and a correction valve. The body includes an air intake passage to receive pressurized air, a drive motor driven by the pressurized air to rotate at a rotational speed including a preset range and an excessive range, and a regulation valve located on the air intake passage to adjust the rotational speed of the drive motor in the preset range. The correction valve includes an adjustment portion operable in an adjustment displacement and a mask wall movable by the adjustment portion to block the air intake passage. The adjustment portion determines the flow amount of the pressurized air passing through the correction valve according to the adjustment displacement thereof to confine the rotational speed of the drive motor from the excessive range to the preset range, thereby controls the rotational speed of the drive motor in the preset range.

Abstract: A grinding device is specified, comprising a housing in which a tool spindle for driving a tool is mounted, comprising a protective hood which can be locked on the housing, and comprising means which allow the tool spindle and the protective hood to be locked. An actuating device is provided which is displaceable on the housing between a first position in which the tool spindle is released and the protective hood is locked against rotation and a second position in which the tool spindle is locked against rotation and the protective hood can be adjusted in the angular position thereof on the housing.

Abstract: The present invention discloses a kind of universal mounting hole means for different tool heads of electric tools, which are disposed on a mounting portion of the tool head, comprising a central hole and a plurality of long and narrow limiting holes which orient radially surrounding the central hole and disposed in distance with each other. Compared with the prior art, the present invention is applicable to various kinds of structures of the mounting seat on electrical tool and is more universal. It takes much convenience to people when changing different tool heads of electric tools, and it is benefit for storing.

Abstract: A hand-guided power tool has a support arm and a tool member supported on the support arm. A drive motor is provided and a drive belt is rotatably driven by the drive motor and drives in turn the tool member. The support arm has a belt chamber in which the drive belt is arranged. The belt chamber is closed off relative to the environment and sealed off relative to the environment.

Abstract: A handheld pneumatic grinder comprises a main body, a transmission portion, and a wheel guard structure. The main body defines an active space. The transmission portion is provided on the main body. The wheel guard structure includes a coupling member, a protective hood, and a control member. The coupling member is coupled to the main body around the transmission portion. The protective hood is rotatably mounted to the coupling member at a center thereof, wherein the protective hood is provided with an engagement means defining a plurality of indentations. The control member has a protrusion, which can engage with one of the indentations of the engagement means to allow the protective hood to be fixed in an angle position. The present invention allows the protective hood to be adjusted without using an external tool, and can achieve a compact design.

Abstract: A handheld machine, comprising a first grip (106) for receiving a first hand of a user of the machine, a second grip (118) for receiving a second hand of the user of the machine, and at least one coupling (114) for connecting the handheld machine to a flexible line (116). The second grip (118) extends in its usage position over the coupling (114) but is displaceable from this position.

Abstract: A clamp arrangement for releasably securing an accessory to an oscillating power tool can include a tool body including a motor that drives an output member. A clamp assembly can include a first clamp member that moves relative to the accessory between a closed position wherein the clamp assembly retains the accessory and an open position wherein the first clamp member of the clamp assembly is offset from the accessory permitting removal of the accessory from the clamp assembly. A lever can have a user engagement portion and a pivot portion including a pivot axle. The lever can be pivotally coupled to the tool body about the pivot axle between a first position, wherein the clamp assembly is in the closed position and a second position wherein movement of the user engagement portion of the lever causes the clamp assembly to be moved to the open position.

Abstract: A protective hood rotation prevention device for a power tool, in particular an angle grinder, includes a clamping unit that is configured to clamp a protective hood unit. The clamping unit includes at least one clamping element with a rotation prevention unit that has a rotation prevention element. The device further includes a movement coupling unit that is configured to move the rotation prevention element in at least one operating state depending on a movement of the clamping element. The device also includes a securing unit that is configured, in at least one operating state, to secure the rotation prevention element, in the event of a movement of the clamping element in a loosening direction of the clamping element, at least as far as possible counter to a movement in an uncoupling direction of the rotation prevention element out of a rotation prevention position of the rotation prevention element.

Abstract: A hand-held power tool comprises an electromotive drive that is configured to drive an output shaft and that is positioned in a first housing part, wherein the electromotive drive and the output shaft define a common first axis. The hand-held power tool further comprises an electronic system that is configured to energize the electromotive drive and that is positioned in a second housing part. The second housing part is elongated and includes a grip that is distal from the electromotive drive. The second housing part defines a second axis that is at an angle to the first axis between 60° and 120°.

Abstract: A power tool, especially an angle grinder, includes at least one grip housing, at least one switching unit that has at least one latch element arranged on the grip housing, and at least one bearing unit configured to mount the latch element such that it is mobile at least with respect to the grip housing. When the latch element is actuated, the bearing unit is configured to guarantee a stroke movement of the latch element along a trajectory of a value greater zero, starting from an end of the latch element closer to the connecting region of the grip housing in the direction of an end of the latch element away from the connecting region, which end is configured to be gripped.

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: A flange nut for use in mounting a power tool component onto a rotatable spindle of a power tool. The flange nut includes one or more non-circular apertures into which an end of a shaped tool such as an Allen wrench may be inserted. Torquing or otherwise applying a force to a portion of the shaped tool serves to thread the nut along the spindle either towards the power tool component to secure the power tool component on the spindle or away from the power tool component to allow for removal of the power tool component.

Abstract: A hand-held electric power tool having a tool that can be rotated around a rotational axis by the drive unit, having a protective cover that at least partially surrounds the tool, having an outlet opening that conveys out of the protective cover the material removed from the workpiece that is to be machined, and having a suction adapter that is connected to the protective cover and that has a connection section with a suction opening for connecting a suction device, the suction adapter having a guide device for guiding the material being removed, the guide device having an outlet opening that differs from the suction opening.

Abstract: A working tool includes a housing (10) and a lever (3) having a gap defined therein for accommodating a rotatable switch lock (1). The switch lock has a first engagement portion (1a) defined on a first side and a stopper portion (1b) defined on a second side, and the lever has a support portion (3a) proximal to the first engagement portion. A handle portion of the housing has a left push button (8) and a right push button (5) inserted therein, a first groove (8a) and a second groove (8b) of the left push button (8) and right push button (5) each having a second engagement portion formed on a groove wall thereof, each of a first extension section (3a-2) and second extension sections (3a-1) being provided with, at a side facing a corresponding second engagement portion, a third engagement portion engageable with the corresponding second engagement portion.

Abstract: A counter-rotating polisher includes: an enclosure, an electric motor, a polishing arrangement and a counter-rotating arrangement. The electric motor is fixed to the enclosure and includes a driving axle. The polishing arrangement includes two polishing device. The polishing devices respectively include a fixed tray and a polishing material that are fixedly connected to an outside of the fixed tray. The fixed tray is perpendicular to the driving axle. The counter-rotating arrangement includes a first driving wheel, a second driving wheel and a change-direction wheel. The first driving wheel is connected to the driving axle and driven by the driving axle. The second driving wheel is fixedly connected to the second fixed tray. The change-direction wheel is connected to the first driving wheel and the second driving wheel. The driving axle rotates the first polishing material positively. The change-direction wheel reversely transmits the rotation to the second driving wheel.

Abstract: An improved hand-held power tool is provided which can effectively reduce whirling vibration caused by imbalance of a rotating element. The power tool has a grip that is connected to a tool body and designed to be held by a user and a self-synchronous mechanism that reduces whirling vibration caused in the tool body or the grip when the tool bit is driven. The self-synchronous mechanism is of a phase variable type, having a rotating body which serves as a vibrator and is rotationally driven by a driving source different from a driving source for the tool bit. The self-synchronous mechanism is disposed in the tool body or the grip in which whirling vibration is caused, and arranged such that a phase of vibration of the rotating body is automatically tuned to a phase of the whirling vibration, thereby reducing the whirling vibration.

Abstract: An impact absorbing mechanism for absorbing impact generated upon meshing of gears by starting or stopping an electric motor, for example, in a speed reduction gear train of a disk grinder, has the problem that its ease of manufacture and the durability are lowered because small elastic components are located between a driven gear and a driven shaft when an impact absorbing action occurs in the rotational direction in the related art. The present invention is aimed to improve the ease of manufacture and the durability of the impact absorbing mechanism. It is configured to absorb impact by displacing steel balls in a diameter expanding direction by relative rotation of a driven gear and a driven shaft due to rotational power generated upon meshing and by displacing an axial displacement member in an axial direction against an axial elastic member.

Abstract: A scratch removal tool that includes a motor, a housing, a rotatable shaft operably coupled to the motor and movable in an axial direction along a length of the shaft, and a head assembly. The head assembly includes a shroud member having an open end, a pad member, a slurry input, a slurry output, and a seal member. The pad member is positioned within the shroud and mounted to the shaft. Rotation of the shaft rotates the pad member. Axial movement of the shaft moves the pad member relative to the open end of the shroud. The slurry input and slurry are in fluid communication with the pad member. The seal member is positioned at the open end of the shroud.

Abstract: Disclosed herein is a power tool (10) comprising a body (12), a rotatable drive shaft (14) having a free end (15) extending from the body (10), and a motor (16) for transmitting torque to the drive shaft (14). A cutting disc (24) having a mounting aperture (26) is engageable on the drive shaft (14). An attachment mechanism is provided for attaching the cutting disc (24) to the drive shaft (14). The attachment mechanism comprises a releasable locking member (30) associated with the drive shaft (14), the locking member (30) being movable between a locked configuration for retaining the cutting disc (24) on the drive shaft (14) and an unlocked configuration for releasing the cutting disc (24) for removal from the drive shaft (14). A biasing member (54) is associated with the locking member (30) for resiliently biasing the locking member toward the locked configuration.

Abstract: A protective cover for a handheld power tool, with a tool that is at least partially surrounded by the protective cover, is formed of at least a first wall element and a second wall element, which in order to form a tool space are connected to each other in a parallel-spaced arrangement. The first wall element has a first circumferential section and the second wall element has a second circumferential section. The circumferential sections overlap each other and form a circumferential wall of the protective cover, with at least one opening which is provided in the outer-lying second circumferential section and under which the inner-lying first circumferential section extends.

Abstract: A hand-held rotary tool is provided which can offer improved usability while realizing reduction of vibration of a tool body. The rotary tool has a tool body, a drive shaft disposed in the tool body, a driven shaft to which a tool bit is attached, an Oldham's coupling that transmits rotation of the drive shaft to the driven shaft, and an elastic element disposed between the driven shaft and the tool body. The driven shaft is prevented from moving in a longitudinal direction of the driven shaft relative to the tool body and allowed to move in a direction transverse to the longitudinal direction of the driven shaft relative to the tool body. During this relative movement, power transmission from the drive shaft to the driven shaft is maintained via the Oldham's coupling. The elastic element absorbs the movement of the driven shaft relative to the tool body.

Abstract: A surface abrasion tool (12) has a first drive shaft (42) connect a motor (14) to a power transfer assembly (20). The power transfer assembly (20) transfers rotary power from the first drive shaft (42) to a second drive shaft (46) which is spaced apart from and parallel to the first drive shaft (42). A sanding disc (26) is secured to the second drive shaft (46). A linear drive means (16) is mounted in fixed relation to the motor (14) and selectively moves a pressure plate (22) relative to the sanding disc (26). A locating pin (28) extends from the pressure plate (22) in opposed relation to the sanding disc (26) and fits within a hole in a work piece. The linear drive means (16) is actuated to push the sanding disc (26) into a side of the work piece opposite the locating pin (28).

Abstract: A concrete saw is disclosed having a rigid metal frame, a hydraulic drive system, a water-cooled hub, and an axially rotatable trigger assembly comprising a 12 volt switch. The saw may include a hydraulic pump operable to supply pressurized hydraulic fluid to the drive system. In some embodiments, the saw may includes a flow sharing valve fluidly coupled to the hydraulic drive system to distribute the pressurized hydraulic fluid from the a hydraulic pump in a portable power pack. A method of removing trip hazards with the saw is also disclosed.

Abstract: A dust collection hood installed on a grinding machine tool which includes a driving motor and at least one grinding portion driven by the driving motor to rotate. The dust collection hood includes a circumferential wall surrounding the grinding portion and a dust collection cap. The dust collection cap is coupled with the circumferential wall to form a dust collection chamber to house the grinding portion, and includes a top fastened to the grinding machine tool. The dust collection chamber is formed at a height gradually decreased from the top towards the circumferential wall. The dust collection cap further includes a dust discharge port communicating with the dust collection chamber and an airflow guiding portion to guide airflow from the dust collection chamber to the dust discharge port. Thus a great amount of dust generated during grinding can be discharged via the dust discharge port.

Abstract: A power tool includes a housing accommodating a motor therein, a bearing base having a lower surface and an upper end that is connected to the housing, an output shaft that is mounted in the bearing base and protrudes out of the lower surface of the bearing base, a shield that is movably connected with the bearing base, and a locking mechanism for locking the shield relative to the bearing base. The locking mechanism further includes a locking element arranged on the shield and a stop member and the bearing base is formed with a hollow chamber within which the stop member is arranged.

Abstract: An abrasive article and method of making same wherein the abrasive article comprises a mounting assembly and an abrasive attachment assembly wherein the first interlock member of the mounting assembly and the second interlock member of the abrasive attachment assembly are configured to align the central axis of the abrasive attachment assembly and the central axis of the mounting assembly, and the first interlock member releasably engages the second interlock member. The abrasive article is adapted to clean a work surface area around studs using a rotary tool, including, for example, a drills or die grinder.

Abstract: A dust shroud apparatus for a work tool includes a housing having at least two perpendicularly aligned side walls, an exhaust tube coupled to the housing, and a mounting system coupled to the housing. The mounting system is adjustable to permit the housing to be secured to a plurality of different sized work tools. The apparatus also includes a cut wheel having an outer edge substantially aligned with the at least two perpendicularly aligned side walls.

Abstract: The present invention relates to an abrading or polishing tool with an improved motor chamber, and more particularly to a tool with a motor chamber having a sleeve or liner lining the inside surface of the motor chamber. In one embodiment, an abrading or polishing tool includes a body defining an internal motor chamber with an inner surface, a liner lining the inner surface of the motor chamber, a rotor contained within the motor chamber for rotation against the liner, and an abrading or polishing head coupled to the rotor for rotation.

Abstract: A concrete finishing tool includes a body having a chassis, a guard, and frame supports. An extension handle is attached to the body, and a motor is attached to the body and operatively connected to a driving gear and driven gear to rotate blades having a quick change coupling mechanism. An integrated handle is configured on the body and houses a switch for the motor that is powered by a power supply.

Abstract: A grout removal tool includes a cover shaped to define a substantially enclosed interior cavity and a grinding assembly designed to simultaneously abrade grout from multiple, non-linear tile joints. The grinding assembly includes a motor-driven shaft that is rotatably coupled to the cover by a pair of ball bearings. The grinding assembly additionally includes two or more grinding elements that are axially mounted on the shaft in a spaced apart relationship, each grinding element including at least one disc-shaped grinding wheel. A vacuum attachment is externally mounted on the cover and is in communication with the interior cavity through a plurality of circular openings formed in the cover in direct alignment with the grinding elements. One end of the vacuum attachment is preferably connected to a vacuum device that forcibly withdraws and contains debris created during the grout grinding process.

Abstract: The invention relates to a protective hood for a hand tool, in particular for an electrical hand tool which has a support area for the attachment of a flange of the hand tool, and with a clamping device for fastening the protective hood to the flange as well as an anti-twist device to secure the angle position of the protective hood relative to the hand tool. It is provided that the support area (9) has at least one anti-twist device element (18) working in conjunction with at least one anti-twist device mating element (47) of the flange (34).

Abstract: The present invention provides a power tool in which the permanent set of an elastic member is suppressed and the vibration reduction effect is maintained over a long period of time. A rubber ring is disposed as the elastic member between a wheel washer mounted on a spindle and a substrate of a diamond wheel, and these are secured by a locknut screwed to a tip of the spindle. This rubber ring absorbs the vibrations applied to the diamond wheel at grinding work. A mounting hole of the substrate is mounted on a boss portion of the wheel washer with a clearance fit, and spring pins whose both ends are supported by the wheel washer and a portion of a holding plate in the locknut are inserted into insertion holes of the substrate and insertion holes of the rubber ring with a clearance fit.

Abstract: A damage prevention tool and method is provided in which a free-floating disk is connected to an abrasion disk through a bearing structure. When the tool is actuated, the abrasion disk rotates substantially independent of the floating disk. The floating disk may have a slightly larger circumference and a non-marring friction material on its outer edge, such that the outer edge does not damage foreign objects and protects the abrasion disk, and the abrasion material mounted to the abrasion disk, from contacting foreign objects.

Abstract: A universal dust shroud includes a unitary mounting bracket on top of the shroud body. The bracket includes a plurality of collar sections attached to the body via a ‘Z’ shaped joint which allows the collar sections to move radially inwardly and outwardly relative to each other to accommodate different angle grinders. The bracket may include slots formed at the base of the bracket. The slots allow air to flow in through the slots, out past the grinding disk, and to the vacuum port. As such, the slots can aid in cooling the grinder output and bearings, and helps keep dust and debris away from the bearings in order to extend the life of the grinder.

Abstract: A motorized lightweight handheld polishing and cleaning apparatus used to clean and polish large and hard to access surfaces and a motorized method for cleaning and polishing large and hard to access surfaces are disclosed. The motorized lightweight handheld polishing and cleaning apparatus includes (a) a body, further comprising a motor used to rotate a cleaning disk, (b) a cleaning disk attached to a rotary axis of a vertical gear of said motor and (c) at least one handle.

Abstract: A blade sharpening system is provided that includes a sharpening assembly including a sharpener configured to engage a generally circular agricultural implement blade while mounted on the agricultural implement. The blade sharpening system also includes a rail configured to support the sharpening assembly and to facilitate movement of the sharpening assembly along the rail. The blade sharpening system further includes a mounting feature coupled to the rail and configured to engage a structural member of the agricultural implement to support the rail and sharpening assembly.

Abstract: A hand held, portable drill bit sharpener is provided which may be powered by a standard commercially available electrical power tool. The power tool may be used to actuate the drill bit sharpener by arranging the drive shaft of the sharpener into the power tool chuck. This drive shaft is connected through a gear set to a biased rotating sharpening stone which is pressed against a drill bit tip. The drill bit may be held in the sharpener using a standard keyless drill bit chuck.

Abstract: The portable abrasive tool comprises a flat motor composed of a rotor having a coil disk in the form of a disk on which multiple coil pieces are arranged in the circumferential direction about the output shaft when seen in the direction of the axis line of the output shaft and a stator having magnets arranged in the manner that the magnetic flux passes through the coil disk in the direction of the axis line of the output shaft, and an abrasive part connected to one end of the output shaft of the flat motor.

Abstract: A counter-rotating polisher includes: an enclosure, an electric motor, a polishing arrangement and a counter-rotating arrangement. The electric motor is fixed to the enclosure and includes a driving axle. The polishing arrangement includes two polishing device. The polishing devices respectively include a fixed tray and a polishing material that are fixedly connected to an outside of the fixed tray. The fixed tray is perpendicular to the driving axle. The counter-rotating arrangement includes a first driving wheel, a second driving wheel and a change-direction wheel. The first driving wheel is connected to the driving axle and driven by the driving axle. The second driving wheel is fixedly connected to the second fixed tray. The change-direction wheel is connected to the first driving wheel and the second driving wheel. The driving axle rotates the first polishing material positively. The change-direction wheel reversely transmits the rotation to the second driving wheel.

Abstract: A counter-rotating polisher includes: an enclosure, an electric motor, a polishing arrangement and a counter-rotating arrangement. The electric motor is fixed to the enclosure and includes a driving axle. The polishing arrangement includes two polishing device. The polishing devices respectively include a fixed tray and a polishing material that are fixedly connected to an outside of the fixed tray. The fixed tray is perpendicular to the driving axle. The counter-rotating arrangement includes a first driving wheel, a second driving wheel and a change-direction wheel. The first driving wheel is connected to the driving axle and driven by the driving axle. The second driving wheel is fixedly connected to the second fixed tray. The change-direction wheel is connected to the first driving wheel and the second driving wheel. The driving axle rotates the first polishing material positively. The change-direction wheel reversely transmits the rotation to the second driving wheel.

Abstract: A protective hood device includes at least one basic body, at least one fastening unit, and at least one protective-hood-device anti-rotation unit. The at least one fastening device is configured, at least partially, to fasten the basic body relative to a hand power tool, in particular by force closure. The at least one protective-hood-device anti-rotation unit has at least one stop element, which is configured, at least partially, in at least one operating state of a hand power tool, to lock the basic body against rotation relative to the hand power tool, in particular by form closure. The at least one stop element is at least partially integral with the fastening unit.

Abstract: A powerhead for a hand held power tool includes a powerhead assembly, the powerhead assembly being operably couplable to a hand held motive source, the powerhead assembly having a rotatable implement, the implement being selectively rotated by the motive source when the motive source is operably coupled to the powerhead assembly, the implement further being rotatable about an implement axis, the implement axis being disposed transverse to a powerhead assembly longitudinal axis, the implement axis intersecting the powerhead assembly longitudinal axis. A hand held power tool and a powerhead of forming a powerhead for a hand held power tool are further included.

Abstract: The present invention particularly relates to a hand-held sanding machine with an outer housing (1), a tool shaft (2) and a brushless electric drive motor. In the present invention, the rotor of the drive motor is fastened to the tool shaft (2) of the sanding machine, and the stator (6) is positioned in the outer housing (1). The present invention also relates to a control method for an electric sanding machine.

Abstract: A back-up apparatus for use with a surface treating apparatus can include a back-up plate having a pad attachment face and a back-up pad having a first pad face and a second pad face. The back-up apparatus can also include a porous interface layer. The interface layer can include an outer face. The back-up apparatus can also include a layer of a first adhesive on the outer face and extending into the interface layer, and a layer of a second adhesive provided on the layer of the first adhesive. The second adhesive can be selected to releasably adhesively bond to an abrasive sheet. The first and second adhesives can be selected such that the adhesive bond between the first adhesive and the second adhesive is stronger than the adhesive bond between the second adhesive and the abrasive sheet.

Abstract: The present invention is an original direct motor-drive portable angle grinder with a disc type motor installed in a position adjacent to the grinding wheel and an outer motor rotating part coaxially and directly driving the grinding wheel. By means of the direct drive, the present invention prevents the emission of noise made by angle type transmission devices. Moreover, an inertial body is installed on the rotating housing that is integrated with the rotating part to form a flywheel or the rotating housing and the inertial body are integrated into a single reinforced structure to enable a flywheel function in order to improve the grinding, polishing and machining or cutting abilities of the grinding wheel.

Abstract: An object of the present invention is to provide a dust collecting cover for a grinding cup wheel having both excellent practicality and versatility. A base plate is joined to a body of the dust collecting cover via elastic bodies at a plurality of positions, an adapter for joining an angle grinder is attachably/detachably provided on the base plate, and a portion of the body cover is formed as a sub-cover openable/closable utilizing a magnetic force of a magnet, and the sub-cover is configured to be fastenable to the body cover by a screw inserted via a through hole provided in the magnet into a female screw part provided on the body cover side.

Abstract: A handheld pneumatic grinder comprises a main body, a transmission portion, and a wheel guard structure. The main body defines an active space. The transmission portion is provided on the main body. The wheel guard structure includes a coupling member, a protective hood, and a control member. The coupling member is coupled to the main body around the transmission portion. The protective hood is rotatably mounted to the coupling member at a center thereof, wherein the protective hood is provided with an engagement means defining a plurality of indentations. The control member has a protrusion, which can engage with one of the indentations of the engagement means to allow the protective hood to be fixed in an angle position. The present invention allows the protective hood to be adjusted without using an external tool, and can achieve a compact design.

Abstract: An adapter is provided for coupling an accessory tool to any of a plurality of power tools wherein each of the plurality of power tools has a distinct tool drive structure. The adapter has body that includes a first side surface, and a second side surface positioned opposite to the first side surface. An inner peripheral surface extends from the first side surface to the second side surface that defines a central opening, and an outer peripheral surface extends from the first side surface to the second side surface. The first side surface has defined therein a plurality of recesses positioned around the central opening. In addition, the body has a first adapter drive structure and a second adapter drive structure. The first adapter drive structure and the second adapter drive structure define the plurality of recesses, and the first adapter drive structure and the second adapter drive structure each possesses a distinct configuration in comparison to each other.

Abstract: The present invention is directed to an insertion tool (12) for a machine tool that has a hub (16) with at least one opening (42, 80) for insertion of a fastening means (40, 84), via which the hub (16) is clampable on a driving flange (22) of the machine tool connected to a drive shaft, the opening (42, 80) including a retaining region (54) and a releasing region (56), the releasing region (56) including a stop (66, 88) for limiting a release motion of the fastening means (40, 84). It is provided that the opening (42, 80) adjacent to the stop (66, 88) has a convex section (76, 90).

Abstract: A sander according to the present application provides a sander with a rotatable plate which can be locked by hand. Specifically, the sander of the present application has a main body and a sanding head mounted below the main body. The main body has a housing, a motor and a coupling mechanism contained in the housing. The sanding head has a sanding plate rotatably connected to the base plate and the base plate and/or the sanding plate may be connected to the coupling mechanism. The base plate may also have a locking means to lock the sanding plate. The sanding head of the present application may also have a rotatable sanding plate to allow for more efficient use of the sanding paper and a locking means that can be used to lock the sanding plate to provide simpler, easier and more reliable manual locking.