Abstract: A tool unit includes a tool head, a motor and a switching drive for the head. The head has a first section with first blades and a second section with second blades. The second section is movable to and fro between a passive and an active position relative to the first section, the second blades being retracted in the passive position, and the second blades projecting axially beyond the first blades in the active position. The drive includes an electromagnet and an actuating armature made from magnetically attractable material and is arranged in the region of action of the electromagnet. The electromagnet is positioned between the head and the motor and is fastened to a housing part of the motor such that it cannot be rotated. The armature is connected fixedly to the second section. A gap remains between the electromagnet and the armature in the passive and active position.

Abstract: A tool head is for machining edges of a workpiece and includes a first tool section with first blades and a second tool section with second blades. The second blades are positioned between the first blades when seen in the circumferential direction. The second section is movable relative to the first section in the direction of the longitudinal axis between a passive and active position. The second blades are axially recessed relative to the first blades in the passive position and project axially outwards between the first blades in the active position. The tool head has a pressure switching mechanism for moving the second tool section between the passive and active position. In a tool system, the tool head and an actuation element can be moved axially relative to each other. The at least one actuation surface and the actuation element are configured to be axially pressed towards each other.

Abstract: The invention is directed to a machine tool for edge machining a workpiece. The machine tool includes a drive unit for a rotary tool, a guide device for guiding the workpiece in a horizontal infeed direction and a chip collecting hood. The guide device includes an upper pressure element and a lower pressure element and one of the pressure elements is settable in the vertical direction relative to the other pressure element and also the drive unit. The chip collecting hood includes a side wall having a cutout for receiving an edge region to be machined of the workpiece. The side wall includes a base wall part and a closure wall part. The base wall part is positioned fixedly relative to the drive unit and the closure wall part is positioned fixedly relative to the pressure element to be settable in the vertical direction. The closure wall part delimits the cutout in the vertical direction.

Abstract: A milling tool has a support member with an exterior surface with at least one receptacle, wherein the at least one receptacle has a bottom. At least one cutting element provided with a cutter having a cutting edge is positioned in the at least one receptacle. A three-point support is arranged between the at least one cutting element and the bottom of the at least one receptacle for positioning the cutting edge relative to the bottom of the at least one receptacle. The three-point support comprises three support pads arranged at a bottom side of the at least one cutting element and/or three projections arranged at the bottom of the at least one receptacle.

Abstract: The invention relates to a machining tool (14) for machining materials by removing material, in particular for wood or wood-like materials, metals, plastics and/or composite materials. The machining tool is provided to be driven in rotation about an axis of rotation (1) and comprises at least one row (17, 18, 19) of individual cutters (2, 2?) arranged in the peripheral direction and having cutting edges (3, 3?) which at least partly overlap. The cutting edges (3, 3?) have a rake angle and are located at an axial angle (?) in relation to the axis of rotation (1). The axial angle (?) lies in a range from 55° to <90° inclusive. The rake angle is >55°.

Abstract: The invention relates to a machining tool (14) for machining materials by removing material, in particular for wood or wood-like materials, metals, plastics and/or composite materials. The machining tool is provided to be driven in rotation about an axis of rotation (1) and comprises at least one row (17, 18, 19) of individual cutters (2, 2?) arranged in the peripheral direction and having cutting edges (3, 3?) which at least partly overlap. The cutting edges (3, 3?) have a rake angle and are located at an axial angle (?) in relation to the axis of rotation (1). The axial angle (?) lies in a range from 55° to <90° inclusive. The rake angle is >55°.

Abstract: A cylindrical cutter for machining wood, wooden materials and plastics, has at least one helical cutting edge, wherein a helix angle ?s of the at least one cutting edge is in a range of 70° to close to 90°, a rake angle ?r of the at least one cutting edge between a tool orthogonal plane Po and a rake face A?—measured in a tool reference plane Pr—is at least 5°, and a wedge angle ?r between the rake face A? and a flank A?—measured in the tool reference plane Pr—is 45° to 65°.

Abstract: The invention relates to a treatment unit with a cutting tool (1) for treating wood, plastic or the like. Said treatment unit comprises a suction hood (6) with a ring (17) that encircles the tool (1) completely in the circumferential direction and at least partially in the axial direction. The suction hood (6) is located on the side of the drive spindle of the tool (1). A chip receiving opening (10) is provided in the tool (1) in the vicinity of the blade (4), said opening traversing the tool (1) in both the axial and the radial direction. A chip formed at the blade (4) is transported through the chip receiving opening (10) to the suction hood (6) from where the chip is removed by air suction.

Abstract: A cutting tool for separating and formatting of sheet materials has a rotationally driven support body having cutting teeth arranged about a circumference of the support body. The cutting teeth have a tooth profile with a radially outwardly positioned front-cutting area with a separating cutting edge and a formatting area with main cutting edges determining the cutting width of the cutting tool. The tooth profile further has a transition area located radially between the front-cutting area and the formatting area. The main cutting edges in the formatting area are arranged radially separately from the separating cutting edges of the front-cutting area by the transition area, wherein the transition area has transition cutting edges adjoining the cutting edges and angled relative to the separating cutting edges toward a radial center axis of the cutting tool. The front-cutting area is symmetrical relative to the radial center axis of the cutting tool.

Abstract: The invention relative to a device for machining workpieces comprising: a chip removing, rotating tool (2) configured substantially as a hollow body including at least one cutter (4), a portion of the tool adjoining the cutter (4) being penetrated by a chip receiving opening (6) for communicating chips into a tool cavity; and an exhaust means including a stationary exhaust housing (10) configured substantially as a hollow body communicating with the cavity (8) at least in part and in connection with at least one exhaust air source; the communicating portion of the exhaust housing (10) comprising in the region of the cutter (4) a chip communicating window (26) porting into an exhaust passage (36) of the exhaust housing (10); and the exhaust passage comprising in an exhaust passage section upstream of the chip communicating window (26), relative to the exhaust direction, at least one auxiliary air infeed opening. The invention relates furthermore to a method for machining workpieces by means of one such device.

Abstract: A milling tool for machining workpieces of wood, derived timber products, plastic material etc., has a support with a receiving portion and a cutting portion. The cutting portion has cutouts with a support surface for receiving at least two exchangeable cutting tips that are connected to the cutouts by at least one screw, respectively. The cutting portion has bores extending from the support surface of the cutouts into the cutting portion. the bores have a threaded portion and a threadless portion. The screws are threaded into the threaded portion of the bores for pressing the cutting tips against the support surface. The cutting tips have receiving openings. The screws have a guide shaft penetrating the receiving opening and extending into the threadless portion that has a tight clearance fit relative to the guide shaft. The screws have a head and the head has a clamping surface extending parallel to the support surface. The guide shaft is arranged adjacent to the clamping surface.

Abstract: A slitting tool for a circular saw machine has a tool carrier with a first and second tool flanges arranged coaxially and axially displaceable relative to one another. A slitting saw blade has first and second blade halves. Fasteners are provided for fastening the first blade half in a detachable manner to the first tool flange and for fastening the second blade half in a detachable manner to the second tool flange. The fasteners are distributed circumferentially about the tool carrier. An adjusting device is arranged within the tool carrier and connects the two tool flanges to one another. At least one fastener is arranged in a displaced position relative to other fasteners for balancing the slitting tool, wherein the displaced position is determined according to balancing criteria.

Abstract: In a method of manufacturing tools having attached thereto cutting plates with a cutting edge coated with a hard cutting material, the cutting plates are first positioned on the cutting tool body in a desired position and fixed on the cutting tool body in that desired position by electric spot welding. Subsequently, the soldering material is applied to each cutting plate. Soldering of the cutting plates to the cutting tool body is performed at a temperature of 720.degree. C. to 850.degree. C. in a vacuum of 10.sup.-4 to 10.sup.-6 mbar. In a final step, the cutting tool body with the cutting plates soldered thereto is slowly cooled in the vacuum oven.

Abstract: Various clamping mechanisms are known for clamping shank-like tools such as drills, milling cutters and the like. The known clamping mechanisms often require long setting times involving long idle times when changing tools, particularly on machines with several spindles. The instant disclosure teaches a clamping mechanism allowing rapid tool change on the machine spindles and having good concentricity characteristics. A bayonet catch-like locking device is used for this purpose.

Abstract: The invention relates to a milling cutter having interchangeable cutter blades which are fixed in grooves in the milling cutter body by means of clamping elements. The cutter blades have integrally formed radial and axial support mountings, by which means a simple and precise mounting of the cutter blades is achieved. The seating surfaces made at the milling cutter body are made as simple, flat surfaces.

Abstract: Circular saw blades, especially for separating wood, cutting grooves into wood and the like materials, are disclosed. Such blades include a cutting zone in which there are arranged cutting teeth, which cutting teeth may be equipped with hard metal cutting plates. Next to the cutting zone there is arranged a carrying zone comprising a central receiving opening. The carrying zone is of approximately constant thickness and is provided at least in the region between the receiving opening and the cutting zone with raised portions. The raised portions are arranged to extend generally over the entire radial and circumferential extent of the carrying zone, substantially continuously in sequence to one another, and in respective opposite direction projecting above the pertaining larger side of the carrying zone. The projections can occupy respectively a section between radii located at an angle of from about 15.degree. to about 30.degree..

Abstract: Tool for drilling holes, such as cylinder head drill, woodworking drill, and the like, which includes a carrier member having at least one endwise arranged end face cutter, or first cutting means, and at least one precutter, or second cutting means, extending in endwise direction, and circumferentially beyond the carrier member, the precutter defining the diameter of the hole to be produced with the tool and including at least one cutting edge. At least the part adjacent the cutting edge of the precutter is approximately parallel to the pertaining circumferential portion of the carrier member. The outer side of the precutter includes at least one guide surface parallel to the outer circumferential portion of the carrier member. The end face cutter and the precutter are removably securable with at least one clamping element to the carrier member and can be in the form of reversible cutting elements.