Abstract: A grinding-means device, in particular a grinding-disc device or backup-pad device, for arranging at least one grinding means, in particular at least one grinding wheel, on a portable power tool, in particular a grinding machine, includes at least one receiving unit, in particular a grinding disc or backup pad, which is fixable in a thread-free manner on an output unit of the tool and on which at least one grinding means is arranged. The grinding-means device includes at least one securing unit formed separately from the receiving unit and configured to axially fix the receiving unit and/or the grinding means to the output unit of the tool in a tool-free manner, and/or at least to axially fix the grinding means to the receiving unit in a tool-free manner.

Abstract: An ultrasonic resonator support structure including a holder supports an ultrasonic resonator at both sides such that the ultrasonic resonator is rotatable to the holder. The ultrasonic resonator includes an ultrasonic horn with a machining tool attached, and a first booster and a second booster coaxially fixed one by one to both ends in the axial directions of the ultrasonic horn. The holder has a rolling bearing mechanism that rotatably supports the first booster side of the ultrasonic resonator and a gas bearing mechanism that rotatably supports the second booster side of the ultrasonic resonator.

Abstract: An oscillating device includes: a driving source; an oscillating member which performs an oscillating motion; and a connecting mechanism which converts a rotational motion of the driving source into an oscillating motion and transmits the oscillating motion to the oscillating member. At least one of a part or whole of a component forming the connecting mechanism is a component made of a fiber-reinforced resin, and the component made of a fiber-reinforced resin includes a reinforced fiber and a binder resin.

Abstract: A quick clamping device for a portable machine tool includes at least one drive shaft, at least one clamping unit, and at least one operating unit. The clamping unit has, for tool-less fastening of an insertion tool on the drive shaft, at least one clamping element for exerting a clamping force on the insertion tool in a clamping position. The operating unit is configured to move the clamping element into a release position, and includes at least one operating element, in particular an operating lever. The operating element has at least one activation surface for movement of the clamping element into the release position. The activation surface is arranged such that at least one force initiation point of the operating element is movable, upon interaction with a contact surface of an actuating element of the operating unit, as a factor of movement of the operating element on the contact surface.

Abstract: A work tool includes a housing, a spindle, a clamp shaft, a biasing member, an operation member, a motion-converting mechanism and a pushing-down member. The spindle is supported to be rotatable around a driving axis. The clamp shaft is movable in the up-down direction relative to the spindle. The biasing member is configured to bias the clamp shaft upward relative to the spindle so as to apply to the clamp shaft a clamping force for clamping a tool accessory between a head part of the clamp shaft and a lower end portion of the spindle. The motion-converting mechanism is configured to move the pushing-down member in the up-down direction along with turning of the operation member around the driving axis. The pushing-down member is configured to be moved downward so as to push the tool accessory downward when the operation member is turned in a first direction.

Abstract: A work tool includes a spindle, a clamp shaft and at least one biasing part. The spindle is configured to be reciprocally rotated within a specified angle range around a driving axis. The spindle has a first inclined face inclined in a direction crossing the driving axis. The clamp shaft includes a shaft part and a head part. The shaft part is configured to be coaxially inserted into the spindle. The head part is formed on a lower end portion of the shaft part and configured to clamp the tool accessory in cooperation with the spindle while a second inclined face of the tool accessory is pressed against the first inclined face. The at least one biasing part is provided in the spindle and configured to always bias the tool accessory downward while the tool accessory is clamped by the head part and the spindle.

Abstract: A grinding wheel center hole protection pad is provided, which mainly include a positioning portion attached to the peripheral thereof and the guiding portions disposed at the center hole at the axial center thereof. The guiding portions serve as the isolation layer between the center hole of the grinding wheel and the peripheral plate guiding wall of a flange plate. Therefore, the grinding wheel can be closely attached to the flange plate during the assembling process to decrease eccentricity. Accordingly, it is not necessary to perform the cutting calibration process and balance adjustment by a cutting machine, which can reduce the waste of manpower and material resources.

Abstract: A hand-held power tool, in particular an angle grinder, includes a gearing housing part and an accessory equipment. The gearing housing part includes at least one machine-side contact element. The accessory equipment includes at least one accessory equipment-side contact element. In the mounted state of the accessory on the hand-held power tool, the at least one machine-side contact element comes into contact with the at least one accessory-side contact element.

Abstract: A cutting blade is mounted on a fixed flange having a cylindrical blade mounting portion. The cutting blade includes an annular blade main body having an outer circumference serving as a cutting edge and a central through-hole that has a diameter greater than an outer diameter of the blade mounting portion and in which the blade mounting portion is to be fitted, and three or more flexible inner circumferential protrusions that project from an inner circumference of the central through-hole toward the center in a diametrical direction and contact at extremities thereof with the blade mounting portion fitted in the central through-hole to support the annular blade main body.

Abstract: An auxiliary oil supply apparatus for a rotating device (50, 51), the rotating device comprising a primary oil supply (52), a rotating component (50) and a static component (51) situated radially outwardly of a centre of rotation of the rotating component (50) and arranged to collect oil (58) held radially outwardly from the rotating component (50) as the rotating component rotates. The auxiliary oil apparatus comprises a scoop (56) associated with the rotating component (50) and is responsive to a change in a known parameter to move between a first position in the static component (51) to a second position between the static component (51) and the centre of rotation.

Abstract: A work tool includes a spindle and a clamp shaft. The spindle is supported to be rotatable around a driving axis defining an up-down direction of the work tool. The clamp shaft includes a shaft part and a fixing part. The shaft part extends coaxially with the spindle. The fixing part is coupled to the shaft part on a lower side of the spindle. The clamp shaft is supported to be movable in the up-down direction relative to the spindle. The clamp shaft is configured to be biased upward and to fix the tool accessory to a lower end portion of the spindle by the fixing par. The fixing part is configured to be removable from the shaft part and to be integrally coupled to the shaft part only by moving upward relative to the shaft part.

Abstract: An oscillating power tool system in one embodiment includes a motor, an output power shaft extending along an axis and operably connected to the motor, the output power shaft driven in an oscillatory manner by the motor about the axis, a flange supported by the output power shaft and fixedly positioned with respect to the output power shaft so as to oscillate with the output power shaft when driven by the motor, the flange including a lower surface defining a first plane, and a plurality of mounting pins extending from the flange to a location beneath the first plane, the plurality of mounting pins configured such that when an accessory is mounted to the flange, a mounting force is applied directly to the plurality of mounting pins from the accessory.

Abstract: A rotary power tool comprises a drive mechanism, a spindle rotatable about a rotational axis in response to receiving torque from the drive mechanism, and a first shank coupled for co-rotation with the spindle and having a first diameter. The first shank includes a first threaded portion upon which a first tool bit is receivable. A second shank is coupled for co-rotation with the spindle and extends outwardly from and coaxial with the first shank. The second shank has a second diameter that is smaller than the first diameter and a second threaded portion upon which a second tool bit is receivable.

Abstract: A glass-plate working apparatus 1 includes: a scribe line forming device 5, glass-plate bend-breaking devices 15A and 15B, glass-plate peripheral edge grinding devices 19A and 19B, and a glass-plate transporting device 20 for carrying in and carrying out two glass plates 2 at a time with respect to each of the scribe line forming device 5, the glass-plate bend-breaking devices 15A and 15B, and the glass-plate peripheral edge grinding devices 19A and 19B, and X-Y coordinate system controlled movement of the glass-plate peripheral edge grinding devices 19A and 19B in simultaneous grinding of peripheral edges of the glass plates 2 is adapted to be effected independently of each other.

Abstract: A power tool is provided including a motor driving a shaft and a drive spindle. The drive spindle includes an outer spindle rotatably driven by the shaft and an inner spindle disposed within the outer spindle. The outer spindle includes an end portion defining an engagement surface for mounting a working accessory, and the inner spindle is axially moveable along a longitudinal axis of the outer spindle but rotationally fixed to the outer spindle. A spring member is arranged to apply a biasing force on the inner spindle in a first direction with respect to the outer spindle. Securing the working accessory on the drive spindle against the engagement surface of the outer spindle applies an axial force on the inner spindle in a second direction opposite the first direction with respect to the outer spindle.

Abstract: Abrasive preforms include a frame having first and second opposed parallel major surfaces. The first major surface has a plurality of first cavities formed therein. The second major surface optionally has a plurality of second cavities formed therein. The frame comprises a binder precursor material. Abrasive particles are disposed in at least a portion of the plurality of first cavities and optional plurality of second cavities. Methods of making abrasive articles using the abrasive preforms and bonded abrasive articles preparable thereby are also disclosed.

Abstract: A post-process tool includes: a fixing bracket mounted in at least one robot; and a grinding assembly installed at one side of the fixing bracket, being moved in a longitudinal direction of the vehicle body, and configured to grind a lamination region. The grinding assembly includes a grinding bracket mounted at the one side of the fixing bracket, a grinding motor reciprocatably installed in the grinding bracket and moving in upward and downward directions; and a grinding wheel coupled to a drive shaft of the grinding motor.

Abstract: A safety cover used in a sand grinder is disclosed to include a cover body rotatably mounted at the base of the sand grinder around the sand wheel and having equiangularly spaced oval locating holes, a positioning device selectively engaged into one of the oval locating holes, and a switching lever mounted at the base and biasable between a locking position where an abutment portion of the switching lever is abutted against the positioning device to lock the positioning device in one oval locating hole and an unlocking position where a bearing portion of the switching lever faces toward the positioning device for enabling the positioning device to be disengaged from the respective oval locating hole.

Abstract: An accessory holder for holding an accessory of a power tool includes a support frame and an actuator. The support frame includes a tool connection structure configured to connect to a driven output of the power tool and an accessory connection structure fixedly extending from the tool connection structure and defining at least one recess. The actuator is rotatably connected to the accessory connection structure and is rotatable to a clamped position and an unclamped position. The actuator is configured to deform a portion of the accessory into the at least one recess when the actuator is in the clamped position, such that the accessory is clamped to the accessory connection structure when the actuator is in the clamped position.

Abstract: A dustless table saw with a built-in dust collection system is disclosed. The table saw uses a soft foldable seal to seal the gap between the blade slot and the blade housing, the blade housing has an internal extraction channel to maximize the dust collection. Another variation of the table saw utilizes a U-shaped blade housing with a divider. The table saw has a built-in raising/lowering mechanism to raise/lower the blade, and a built-in tilting mechanism to tile the blade. The table saw also utilizes an anti-dust blade guard to optimize the dust extraction.

Abstract: An adapter according to one aspect is an adapter for fixing to a shaft of a grinding machine a grinding wheel having a through-hole where the shaft is inserted. The adapter is provided with a main body having at least a portion thereof inserted into the through-hole, the main body including an outer wall that contacts a wall of the through-hole and an inner wall that forms an opening that corresponds to the shaft, and a plurality of reinforcing parts provided in predetermined intervals along a circumferential direction of the main body. Each reinforcing part extends from the inner wall to the outer wall, and a notch is formed in each reinforcing part.

Abstract: A spindle locking device for a portable machine tool includes a locking unit and a movement activation unit. The locking unit has a movably mounted locking element configured to lock a spindle of the portable machine tool in at least one direction, and an operating element configured to actuate the locking element. The movement activation unit is configured to pretension the locking element in a direction towards a locking position, at least when the operating element is in an unactuated position.

Abstract: A self-centering grinding wheel assembly that includes a spindle shaft including a conical-shaped end, a grinding wheel, and a grinding wheel adapter. The grinding wheel adapter affixed to the grinding wheel. A plurality of alignment members disposed radially within the grinding wheel adapter. Each of the plurality of alignment members include a tapered surface that conforms to a conical end of the spindle shaft. The plurality of alignment members slide radially with the grinding wheel adapter. The plurality of alignment members self-center the grinding wheel adapter on the spindle shaft in response to the grinding wheel adapter being assembled to the conical end of the conical shaft.

Abstract: A power tool has a driving shaft for driving a working element and a clamping device for clamping the working element. The clamping device has a clamping position in which the working element may be fixed relative to the driving shaft and a release position in which the working element can be removed from the driving shaft. An operating member is coupled to the clamping device for moving the clamping device between positions. The clamping device also has a rotating position in which the working element can be rotated by an angle relative to the driving shaft and the operating member has an operating position that corresponds to the rotating position.

Abstract: A method and a machine for automatically changing a disc tool to a tool holder of an automated machine working with the disc tools is disclosed. The method includes in the disc tool replacement machine: determining that the tool holder is in a replacement area in the disc tool replacement machine; unfastening a fixing member of the tool holder by applying an unfastening force to the fixing member, wherein the fixing member fixes a disc tool to a backing plate of the tool holder through a through hole at a centre of the disc tool; removing the disc tool from the tool holder after said unfastening; inserting a new disc tool to the tool holder; and fastening the fixing member of the tool holder by applying a fastening force to the fixing member, thus fixing the disc tool to the backing plate of the tool holder through the through hole.

Abstract: The invention relates to an interface between a knife and a knife holder, wherein the knife and the knife holder are designed such that the knife can be mounted on the knife holder in such a way that the knife is initially positioned on the knife holder in the axial direction, and then by rotating either the knife relative to the knife holder and/or the knife holder relative to the knife, the knife is locked on the knife holder with respect to the axial direction, wherein the knife has a single central fastening opening which is delimited by a knife edge region, and the knife holder has a fastening section for the fastening opening of the knife, which is delimited by a holder edge region.

Abstract: In a thread grinder which grinds a thread grove on an inner surface of a workpiece while a rotation axis of a grinding wheel shaft is inclined with respect to an axis of a main shaft, a centering master which has a cylindrical outer surface is mounted to the main shaft. A measuring unit including two measuring instruments such that probes can contact two edges of a grinding wheel is mounted to the centering master. The origins of the measuring instruments are set by the probes contacting the cylindrical outer surface of the centering master. The measuring unit is moved in the axial direction of the centering master to bring the probes of the two measuring instruments into contact with the edges of the grinding wheel, respectively. The position of the grinding wheel shaft is adjusted such that measured values obtained by measuring instruments become same.

Abstract: A powered working machine facilitating work of fixing a tip tool to a tool supporting member is provided. A powered working machine in which a tip tool is driven by power of an electric-powered motor includes: an output shaft to which the tip tool is attached; a tool fixing member which fixes the tip tool to the output shaft; a second shaft to/from which the tool fixing member is attached/detached; a clamp having a locked state in which a state of attachment of the tool fixing member to the second shaft is maintained and an unlocked state in which the tool fixing member can be detached from the second shaft; and a guide member having a first rotation position at which the clamp is in the locked state and a second rotation position at which the clamp is in the unlocked state.

Abstract: A power tool having a housing, a motor, a tool holder driven about an output axis by the motor, and an output element for performing an operation on a workpiece. The tool holder has a locating feature including a tapered portion becoming narrower in a direction away from the surface of the tool holder. The output element has an aperture for receiving the locating feature and a face facing the surface of the tool holder when the locating feature is received. The power tool also includes a flange for transferring a clamping force for urging the output element towards the tool holder and a tab projecting from the flange for finger tightening the flange. A biasing member provides the clamping force toollessly. A gap is defined between the surface of the tool holder and the face when the tapered portion of the locating feature is fully received in the aperture.

Abstract: A power tool includes a spindle and a clamp shaft, and drives a tool accessory clamped by an outer flange and a clamp head. A ball or a grooved clamping element is configured to hold the clamp shaft against the spindle in a fixed manner. A holding element holds and moves the ball or grooved clamping element. A coil spring biases the holding element. The ball or grooved clamping element is movable between a first position where it holds the clamp shaft and a second position where it does not hold the clamp shaft. The holding element is capable of moving the ball or the grooved clamping element from the first position to the second position. The coil spring biases the holding element and prevents movement of the holding element when the ball or the grooved clamping element is located in the second position.

Abstract: A clamping device for a hand-held power tool includes at least one clamping unit configured to clamp a processing tool in an axial direction and at least one operating unit configured to actuate the at least one clamping unit. The at least one operating unit has at least one jaw coupling element configured to couple the at least one operating unit to the at least one clamping unit in a rotationally fixed manner. The at least one jaw coupling element is supported so as to be movable at least substantially parallel to the axial direction.

Abstract: An accessory clamping mechanism for clamping an accessory to a working mandrel having a mandrel flange. The accessory clamping mechanism includes: a fastening flange; a driving device for forcing the fastening flange to move between a released position in which the accessory can be removed between the mandrel flange and the fastening flange and a clamped position in which the accessory is clamped between the mandrel flange and the fastening flange; a pushing member connected to the fastening flange; and a first elastic member by which the fastening flange is biased towards the clamped position; wherein the pushing member is arranged on one side of the working mandrel.

Abstract: A power tool arbor assembly includes an arbor, an actuating member located at a second end of the arbor, and a friction member located at the second end of the arbor. The friction member is axially movable along the second end of the arbor. The friction member has a first axial position when no power tool accessory is attached to the second end of the arbor. The friction member is moveable toward a first end of the arbor from the first axial position to a second axial position in response to contact between the power tool accessory and the friction member, and the friction member is moveable toward the first end of the arbor from the second axial position to a third axial position when the actuating member is actuated.

Abstract: A device for replacing sanding elements of a polishing device includes a first support, a second support, a feeder assembly, a suction assembly, a first pushing assembly, a second pushing assembly, and a clamping assembly. The feeder assembly includes a receiving member configured to receive the sanding elements, and a supporting member positioned below the receiving member. The suction assembly includes a suction member configured to draw a sanding element from the receiving member, and a rotary actuator configured to rotate the suction member. The first pushing assembly is configured to receive the sanding element from the suction member and transport the sanding element to the polishing device. The clamping assembly is configured to attach an unused sanding element to, and detach a used sanding element from, a manipulator of the polishing device, and the second pushing assembly is configured to separate the sanding element from the clamping assembly.

Abstract: A tool chucking device, especially an oscillation tool chucking device, includes at least one chucking unit which has at least one chucking element for clamping a treatment tool in an axial direction and at least one control unit for actuating the chucking element. The tool chucking device further includes at least one conversion unit which is designed to modify a conversion ratio depending on at least one movement component of a control element of the control unit.

Abstract: A power tool braking device of a portable power tool includes at least one braking unit that is configured to brake a spindle of the portable power tool and/or a machining tool in at least one braking position of the braking unit. The power tool braking device further includes at least one spindle fixing unit that is configured to fix the spindle in at least one fixing position of the spindle fixing unit. The braking unit and the spindle fixing unit are at least partially configured as a single piece.

Abstract: A tool arrangement for a rotary machining tool, for example a grinding disk, has a spindle rotatably accommodated in a housing via a bearing set, onto which spindle a tool holder including a tool mandrel can be clamped for fixing the tool. The tool holder with the tool can be clamped onto the spindle such that the at least one front bearing of the bearing set as well as the set center of the bearing set are enclosed by the tool mandrel and/or the tool.

Abstract: The invention discloses a hand-held power tool including a housing with a spindle head. A tool spindle can be driven in rotary oscillation about its longitudinal axis and, at its tool-side end, is configured to carry a tool. The tool spindle has a clamping mechanism, which is configured to move a positioning element between a clamping position, in which a tool that is to be carried can be fixed to the tool spindle, and a release position, in which the tool can be released. The clamping mechanism has an actuating mechanism having an actuating element configured as a slide having an engaging surface for axially moving the positioning element to move the clamping mechanism between the clamping and the release positions when the actuating element is moved.

Abstract: An abrasive cut-off wheel with an abrasive cut-off ring (1), the abrasive body (10) of which comprises bound abrasive, wherein the abrasive cut-off ring (1) is fixed in the operating state by means of two circular clamping discs (2, 3) that can be clamped together in axial direction by means of central clamping flanges (4a, 4b) on the machine side, and at least one clamping disc (2) is connected in an anti-twist manner to the abrasive cut-off ring (1) by means of interacting projections (5, 6) and recesses (7, 8), and wherein the projections (5) and recesses (7) respectively arranged on the abrasive cut-off ring (1) are provided on a metal insert (9) of the abrasive cut-off ring (1), which projects beyond the abrasive body (10) in radial direction.

Abstract: A power tool has a driving shaft for driving a working element and a clamping device for clamping the working element. The clamping device has a clamping position in which the working element may be fixed relative to the driving shaft and a release position in which the working element can be removed from the driving shaft. An operating member is coupled to the clamping device for moving the clamping device between positions. The clamping device also has a rotating position in which the working element can be rotated by an angle relative to the driving shaft and the operating member has an operating position that corresponds to the rotating position.

Abstract: An oscillating rotary electric power tool, in which a spindle with a distal end tool attached thereto is projected downward from a front end portion of a housing accommodating a motor, and the housing also accommodates a coupling member rotatable integrally with an output shaft of the motor, a crankshaft fitted with the coupling member in a depression and projection fitting structure, and a link member to which the spindle is fixed and power is transmitted from the crankshaft to rotate clockwise and counterclockwise in an oscillating manner so that the link member will be driven by the motor to rotate the spindle clockwise and counterclockwise in the oscillating manner, wherein an elastic body is interposed between the coupling member and the crankshaft in the same axial direction as the output shaft.

Abstract: An adjustable safety rest for grinding wheel includes a notch in one of a base edge defining side walls and an inner wall conformable in a spaced relationship around outer side edges and the outer edge of a grinding wheel. A wheel edge gap conformable member or special shape member is mounted in a base fixed to the grinder and is axially adjustable in position to maintain a first end of member in a fixed spaced dimensional relationship relative to one portion of the outer surface of the grinding wheel as the grinding wheel undergoes wear. The member may be disposed in a recess in the base at a 45° degree angle intersecting at least one inner corner of the notch in the base. The member may also be centrally mounted on the base to intersect only the inner wall of the base.

Abstract: A clamping device for clamping an accessory to a power tool includes a first flange, a spindle member, and a cam member. The first flange is coupled to a drive system of the power tool and is configured to receive the accessory. The spindle member defines a longitudinal axis and includes a second flange provided on an end of the spindle member and a follower member provided on an opposite end of the spindle member. The cam member includes a cam surface configured to interact with the follower surface, the cam member is rotatable about the longitudinal axis to a clamped position and to an unclamped position. In the unclamped position the accessory is removable from the first flange, and in the clamped position the accessory is clamped between the first flange and the second flange.

Abstract: Devices for removing a coating on a pipe are provided. In one aspect, a device for removing a coating on a pipe includes a sleeve, an arm coupled to the sleeve, and a wheel coupled to the arm. The sleeve includes a wall and an aperture defined through the wall. The wall defines a cavity in the sleeve and the sleeve is adapted to receive the pipe in the cavity. The device also includes a wheel coupled to the arm and adapted to extend through the aperture to engage the coating on the pipe.

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 blade mounting assembly for mounting a rotary blade to an arbor comprises an outer washer including a hub configured to extend through a bore of the blade, the hub defining a central bore sized to receive a spindle of the arbor. The hub further includes a locating surface arranged to contact the shoulder when the spindle extends through the central bore. The washer includes an engagement surface contacting the left side face of the blade when the hub extends through the bore of the blade. The engagement surface is disposed a fixed axial distance from the locating surface relative to the length of the hub. A fastener engages the outer washer to the arbor with the locating surface in contact with the shoulder. The assembly further includes a biasing element configured to be disposed over the hub between the shoulder and the right side face of the blade.

Abstract: A position adjustment mechanism for grinding wheels includes a rotating body, a first grinding unit, a second grinding unit, and a fixing nut. The rotating body includes a fixing surface and a first thread portion. The first grinding unit includes a first grinding portion and a fixing portion fixedly engaged with the fixing surface. The second grinding unit includes a second thread portion, which is threadedly engaged with the first thread portion of the rotating body, and a second grinding portion which is spaced from the first grinding portion and which has a different grinding precision from that of the first grinding portion. The fixing nut is threadedly engaged with the first thread portion, and presses axially against the second grinding unit. Thereby, a rough grinding and a fine grinding can be accomplished together within a grinding process, and adjustment on a spacing between the two grinding wheels becomes easy.

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: An adapter is disclosed for mounting a tool on an oscillating drive having a drive shaft that can be driven to oscillate about its longitudinal axis, wherein the adapter is passed by a central opening, and has at its drive end at least one positive-locking element for positive connection with the tool, the positive-locking element having the shape of a regular polygon, or a plurality of positive-locking elements arranged on a circle concentric to the center axis, or a plurality of outwardly extending convex projections having rounded tips and being connected with neighboring projections via rounded concave lateral flanks, wherein the positive-locking elements on the drive end are configured for positive-locking connection with a matching positive-locking counter-element on the drive shaft, and wherein the adapter has a second receptacle on its tool end for effecting connection with a tool having a shape different from the first receptacle and being configured as a circle, or as a plurality of positive-locking

Abstract: A tool holder (10) for a tool which can rotate about an axis of rotation (D) comprises a clamping shank (18) which, in an end shank region, has a clamping formation (14) with an accommodating opening (16) which is central in relation to the axis of rotation (D) and is intended for accommodating a retaining shank of the tool, there being provided, on the lateral circumference of the accommodating opening (16), at least one clamping surface for securing the retaining shank of the tool with press-fit action. According to the invention, on an axial section which forms an axial bracing section (VA), the tool holder (10) has a bracing arrangement (20) which, at least during operation of the tool holder (10), subjects the tool holder (10) to a bracing force (Vk) with a bracing force component (Vk) acting in the axial direction.