Abstract: A cutting guide system used with a rotary cutting tool to cut a sink drain fitting in a sink includes a cylindrical sink collar having an open lower end with a radially-projecting lower edge. A cylindrical tool engagement collar at an open top end engages the rotary cutting tool, and at an outside surface engages an inner wall of the cylindrical sink collar. A rotary shaft engages a rotary tool chuck at a proximal end and has at a distal end a rotary blade mount for a generally circular rotary blade. With the tool engagement collar fixed with the rotary cutting tool, and with the sink collar fixed with the tool engagement collar, the rotary cutting tool is inserted into the sink drain fitting to cut through the sink drain fitting in a circular path. Spark arresters, a garbage disposable support stand, and a debris-catching bowl are further included.

Abstract: A cutting tool rotatable about a tool axis, having a cutting body and at least one indexable, single-sided cutting insert removably secured in an insert receiving pocket of the cutting body. The cutting insert has opposing upper and lower surfaces with a peripheral side surface extending therebetween and a central axis passing therethrough. First and second clamping bores extend between and open out at the upper and lower surfaces. First and second primary cutting edges are formed at the intersection of the upper surface and the peripheral side surface. The lower surface includes first and second annular recesses communicating with the first and second clamping bores, respectively, and first and second recess channels extending from the first and second clamping bores, respectively, to the peripheral side surface. The first and second recess channels extend parallel to a longitudinal first plane containing the central axis.

Abstract: A drilling device with automatic or controlled feed speed. The drilling device includes a casing that houses a drilling spindle that is to drive a cutting tool in motion to drill a workpiece having a target surface. The spindle is tiltable inside the casing relative to the axis of the casing. The device has a self-alignment, which self-aligns the spindle relative to the target surface. The self-alignment moves the spindle into a position in which its axis is essentially perpendicular to the target surface under the effect of an application of a thrust force of the drilling device against the target surface essentially along the axis of the casing.

Abstract: A machine tool for cutting a workpiece with a cutting tool, includes a spindle motor that generates heat, a spindle head for supporting the spindle motor, and a heat insulating sheet disposed between the spindle motor and the spindle head. The area of a part of the heat insulating sheet that is in contact with a part of the spindle head having a high heat capacity is small so as to increase the amount of heat transferring from the spindle motor to the part of the spindle head having a high heat capacity, and thereby make the temperature distribution of the spindle head uniform.

Abstract: A cutting tool is configured to cut and countersink a hole in a workpiece. The cutting tool includes a shank and a fluted body extending along an axis. The body includes a tip, a chamfer in an axially spaced relationship with the tip and a cross hole with a proximal end opening to the chamfer. The body has a cutting section extending between the tip and the chamfer, and a countersinking section extending along the chamfer. At the cutting section, the body includes at least one hole-cutting edge. At the countersinking section, the body includes a scalloped countersink-cutting edge along a junction of the chamfer and the proximal end of the cross hole.

Abstract: A cutting insert, a cutting tool and method of manufacturing a machined product. The cutting insert includes: upper and lower surfaces; a side surface; a cutting edge; and a rake portion on the upper surface. The cutting edge includes major and minor cutting edges that are convex toward outside of the main body portion. The minor cutting edge has a curvature radius smaller than a curvature radius of the major cutting edge. The rake portion is inclined and approaches the lower surface as moving from the major cutting edge toward inside of the main body portion and is located along the major cutting edge. An inclination angle of the rake portion becomes smaller as moving from a part continuous with one end of the major cutting edge toward a part continuous with center of the major cutting edge.

Abstract: Proposed is a lubrication system, in particular a single-duct minimum quantity lubrication system, having an aerosol generator, a spindle, a tool clamper arranged on the spindle and a rotary feedthrough arranged on the side of the spindle located opposite the tool clamper, the tool clamper, the spindle and the rotary feedthrough are penetrated by a duct, in the duct is arranged a spindle tube which improves the transport of aerosol, in particular the transport of lubricant particles and/or coolant particles, above all inside the spindle or motor spindle. Further, the spindle tube is mounted in the duct in an electrically insulating manner and/or in that the spindle tube is produced from a material that is not electrically conducting and/or in that the spindle tube and/or the duct is/are provided with at least one electrically insulating layer for coating the spindle tube and/or the duct in an electrically insulating manner.

Abstract: A clamping unit includes a drawbar having an interior surface defining a fluid transport channel. A fluid transport pipe is at least partially disposed within the interior of the drawbar and is in fluid communication with a fluid transport adapter and a fluid transport channel to enable high pressure fluid to be provided directly to a toolholder. The clamping unit further comprises at least one spring-like member positioned around the outer surface of the drawbar to provide a biasing force against an end plate. The drawbar is movable along a longitudinal axis between a locked position and a tool release position by applying and not applying hydraulic pressure against the end plate, thereby providing a quick-change feature of the invention.

Abstract: A machine tool for machining a workpiece clamped in the working space of the machine tool by means of a tool. The machine tool includes a machine bed, which has a chip collection region having at least one conveying channel open on the working space side for collecting chips that drop during the machining of the workpiece, and a conveying device for leading away chips that have dropped into the chip collection region in the at least one conveying channel. The conveying device has a stationary supporting shaft, which extends in the at least one conveying channel in the longitudinal direction of the conveying channel, wherein a spiral element is rotatably supported on the stationary supporting shaft, and wherein the conveying device also comprises a drive for driving the rotational motion of the spiral element about the stationary supporting shaft.

Abstract: A step bit according to some embodiments includes a body including one or more flutes having a cutting edge configured to cut a hole in a workpiece, and a plurality of steps provided on the body. The steps progressively increase in diameter from a first distal step to a terminal proximal step. One or more of the steps have first and second lands. An outer diameter of the first land is less than the outer diameter of the second land. A length of the first land is less than a length of the second land.

Abstract: The present invention provides a machine tool provided with a cover body having a simple structure, excellent operability, and low manufacturing cost. A tool post movement region one-side-closing cover part (9) for closing a tool post movement region open part (8) is configured so as to be: capable of expanding and contracting in a horizontal movement direction of a tool post (3); arranged facing the tool post (3); elongated by urging means (10) to press against the tool post (3) in a relatively slidable manner and close the tool post movement region open part (8); expanded and contracted by movement of the tool post (3) to hold the tool post movement region open part (8) in a closed state; and provided unconnected to the tool post (3) so that the tool post (3) is relatively slidable with respect to the tool post movement region open part (8) is held in a closed state.

Abstract: An attrition liner machining tool, configured to machine the surface of an attrition liner provided radially outward of a set of a plurality of fan blades in a gas turbine engine. The tool includes at least one rotating machine tool having a connector at a first end and a cutter at a second end. The connector is configured to rigidly connect to a rotating fan blade mount of the gas turbine engine that, in use of the gas turbine engine, supports the fan blades. The cutter is configured to machine the attrition liner. The at least one rotating machine tool is configured such that, when it is connected to said rotating fan blade mount of a gas turbine engine, the cutter is passed across the surface of the attrition liner when said rotating fan blade mount is rotated.

Abstract: A method for skiving machining a toothed workpiece includes the steps of: providing the toothed workpiece rotatable about a workpiece axis; providing a toothed tool rotatable about a tool axis; tilting the tool axis through an azimuth angle ?>0° with respect to an x direction; tilting the tool axis furthermore through a polar angle ?<90 ° with respect to a z direction; rotating the toothed tool about the tool axis, the toothed tool in a contact zone sliding over the toothed workpiece rotating about the workpiece axis. The workpiece axis defines the x direction and the perpendicular of the contact zone to the workpiece axis defines a z direction. The x direction, a y direction and the z direction form a Cartesian coordinate system. This method can easily produce a chamber on the toothed workpiece with the toothed tool which is subject to fewer geometric restrictions.

Abstract: A formed rotary cutting tool includes a cutting edge defining a cutting edge diameter that is increased and reduced in a direction of an axis of the tool, so as to have at least one neck portion in which the cutting edge diameter is minimized. The cutting tool includes a roughing portion which is provided on a periphery thereof and which is constituted by a succession of protrusions and recesses arranged in the direction of the axis. The roughing portion includes (i) a fine roughing portion that is provided in at least one of the at least one neck portion, and (ii) another portion that is provided in a portion that is other than the at least one of the at least one neck portion. The fine roughing portion of the roughing portion is different in characteristics from the above-described another portion of the roughing portion.

Abstract: A deburring tool includes a shank attached at a first end to a chuck and a working portion at a second end of the shank. The working portion includes a first end portion closest to and joining the second end of the shank at a first end of the first end portion, a second end portion furthest from the shank, and an intermediate portion disposed between the first end portion and the second end portion, a first end of the intermediate portion joining a second end of the first end portion and a second end of the intermediate portion joining a first end of the second end portion. The intermediate portion tapers continuously from a largest diameter at the first end of the intermediate portion to a smallest diameter at the second end of the intermediate portion, and deburring cutter members provided on the second end portion adjacent the second end of the intermediate portion.

Abstract: A milling tool is disclosed. The milling tool may include an elongated body having a longitudinal axis and a plurality of cutting inserts. The cutting inserts may each have a cutting edge and a cutting radius and be coupled to the body and spaced along the longitudinal axis. One or more of the plurality of cutting inserts may be adjustable (e.g., mechanically adjustable) between first and second cutting radii. A difference between the first and second cutting radii may be at least 10 ?m. The milling tool may include cutting inserts having a plurality of different cutting radii. The milling tool may be configured to have a length that spans an entire height of an engine bore. The cutting inserts having different radii may compensate for dimensional errors in an engine bore diameter that occur when milling a deep pocket.

Abstract: A holding apparatus for an in particular dental workpiece includes a holding element and a fixing device. The workpiece can be fixed to the holding apparatus by a relative movement of the fixing device with respect to the holding element. The fixing device or the holding element has a split sleeve, and the inside surface of the split sleeve forms a clamping surface for the workpiece. Upon the relative movement of the fixing device with respect to the holding element, the workpiece can be braced against the holding device by the clamping surface.

Abstract: Inclined surfaces are formed on a rake face and a recessed groove is formed in the central portion between the inclined surfaces. A groove width of the recessed groove gradually increases from the position of the end cutting edge toward the rear, then gradually decreases such that the recessed groove has a narrowest portion at a position P2 forward of the position P3 of an upper end of a breaker wall and rearward of a positive rake angle rear end position P1, and then gradually increases toward the rear up to the position P3 of the upper end of the breaker wall. The dimensional relation W1<W2<W3 holds, where W1 is the groove width at the end cutting edge, W2 is the groove width at the narrowest portion, and W3 is the groove width at the position P3 of the upper end of the breaker wall.

Abstract: A router power tool having a housing and a base, the housing mounted to be moveable with respect to the base. The base and housing are connected by first and second extendable assemblies, at least one of the assemblies including biasing means to bias the housing away from the base. This extendable assembly has a control portion which can be moved, while located with the extendable assembly, from a first position in which the biasing means provides the biasing force and a second position in which the biasing means is released. In one embodiment, the router power tool includes safety stop portions to prevent movement of the tool holder while cutting tool changing is being performed. In another embodiment, a safety stop portion limits movement of at least one of the extendable assemblies when the cover is held by the power switch when in the on position.

Abstract: A positioning of a spindle with micrometric forwarding control and tilting of its rotation axis includes a spindle shaft rotatingly supported inside rotatable supports, wherein the rotatable supports include two spherical elements having housings which are eccentric with respect to the rotation axis that join the centers of the spheres, and wherein the two spherical elements are positioned in a cylindrical housing having at least two parts, and wherein two rotation elements are connected to the two spherical elements and cause their independent rotation.