Abstract: The cutting method of steel for machine structural use includes: forming a mist by mixing a cutting fluid supplied at a supply rate of 0.01 ml/hour to 200 ml/hour and an oxidizing gas containing, by volume %, 21% to 50% of oxygen; and cutting the steel for machine structural use while the mist is blown on the cutting edge surface of a tool and the surface of the steel for machine structural use, wherein the steel for machine structural use includes, by mass %: C: 0.01% to 1.2%, Si: 0.005% to 3.0%, Mn: 0.05% to 3.0%, P: 0.001% to 0.2%, S: 0.001% to 0.35%, N: 0.002% to 0.035%, Al: 0.05% to 1.0%, and the balance consisting of Fe and inevitable impurities in which O is limited to 0.003% or less, and the amount of Al [Al %] and the amount of N [N %] satisfy [Al %]?(27/14)×[N %]?0.05.

Abstract: A drilling device having an oil supply tank disposed at a position where the oil supply tank is less likely to collide with surrounding objects. This device includes a fixing member (12) fixed to a workpiece, a column (14) extending upward from the fixing member, a tubular slide unit (16) that is slidable along the column, a tool body (18) disposed on the tubular slide unit, and an oil supply tank (20) provided between the tool body and the fixing member and removably fixed to the tubular slide unit. The tool body is provided with a cutting oil supply passage having a cutting oil inlet (109) disposed toward the fixing member, while the oil supply tank is provided with a cutting oil outlet disposed upward. The tool body is displaced upward on the column and the oil supply tank is moved close to the tool body from the lower side of the tool body, whereby the cutting oil outlet of the oil supply tank is connected to the cutting oil inlet of the tool body.

Abstract: The invention relates to a method for machining a part to be machined using a machining tool, in which at least a portion of the machining area, likely to be heated during the machining of the part, or a portion of the machining tool is cooled by dispensing liquid nitrogen to said machining area or said tool. Solid CO2 particles are also dispensed into the machining area. The invention also relates to an apparatus for implementing said method.

Abstract: The present invention relates to a core drilling machine (100). The core drilling machine (100) includes a front housing part (102) including a protruding nose. The drilling machine (100) includes a front handle assembly (118) and an output drive shaft (110) projecting outward from the protruding nose. A fluid attachment ring (120) is rotably arranged around the protruding nose. Further, the front handle assembly (118) is arranged around the protruding nose.

Abstract: A reamer includes a column section rotating around a central line in a predetermined rotation direction; a blade section provided on an outer surface of the column section and extending while being twisted in a direction to upper-cut; a cut liquid flow passage provided in the column section to introduce a cut liquid into the cut liquid flow passage; and an outlet group formed on the outer surface of the column section and connected with the cut liquid flow passage. The cut liquid flow passage extends such that the cut liquid is discharged from the outlet group toward a back portion of the reamer.

Abstract: A dust suction device for detachable attachment to a hand-held drilling machine includes a housing, a telescoping suction pipe coupled to the housing, an electric motor positioned in the housing, a suction fan driven by the electric motor and operable to generate a vacuum in the suction pipe, a dust collection container coupled to the housing and positioned upstream of the suction fan, and a support frame. The support frame includes a first portion coupled to the housing, a second portion coupled to a neck of the drilling machine, and an auxiliary handle extending from one of the first and second portions of the support frame. The support frame supports the drilling machine in a side-by-side relationship with the dust suction device.

Abstract: A drill guide, of the type that has a main body with a flat base and an aperture for assisting the movement of a drill bit, interchangeable drilling heads for guiding drill bits of different diameters, the heads designed to be optionally attached and fit onto the housing defined according to the size of through hole of the main body that has the aforementioned interchangeable drilling heads and inside apertures of different diameters on each drilling head, the apertures are specifically designed to guide drill bits of different diameters, a positioning device for attaching the drilling head in use in a set position inside the housing, and a retaining device for retaining any of the interchangeable drilling heads inside the housing.

Abstract: A drainage assembly for a faceting machine splash pan including a drain for draining slurry, a funnel for capturing the slurry including a basin mounted upon a tubular neck, the basin defining a rim having a sealing member circumferentially disposed thereon, the funnel further including a hose fitting positioned within the neck, and a drain hose received within the neck and removably attached to the hose fitting and in fluid communication with the basin, wherein a mechanical disconnect is provided between the drain and the drain hose.

Abstract: A drilling apparatus designed used to drill multiple holes in the bottom surface of an overhead surface. The drilling apparatus includes a lower frame member and an upper frame member longitudinally aligned thereover. The lower frame member includes two vertical uprights perpendicularly aligned and attached to a lower base mounted on caster wheels. A cable attached to a winch selectively lowers and raises the upper frame member over the lower frame member. Attached to the upper end of the upper frame member is a perpendicularly aligned horizontal support member. Mounted on the support member are two or more drill brackets that hold inverted drill motors each with a drill bit at a fixed location and at a fixed angle. At least one drill bracket includes a horizontal alignment flange surface that is used as an alignment surface for a laser placed on the support surface and aimed upward to the precise hole location on the overhead surface.

Abstract: A cutting tool includes a coolant conveying member, to provide coolant fluid to a cutting area during a cutting operation. The coolant conveying member includes a member body having a fluid passage formed therein, and a nozzle to convey and to jet out the coolant fluid therethrough. The nozzle is shiftable relative to the member body, between a first, extended position and a second, retracted position. In the extended position, for example, assumed during the cutting operation—the nozzle extends out and forwardly from the member body, stabilized by the continuous flow of coolant fluid therethrough, forcing the nozzle forwardly. In the retracted position, for example, assumed when the when the coolant fluid does not flow through the coolant conveying member, or flows at a very low rate, the nozzle may be at least partially accommodated in the fluid passage, to allow, for example, indexing or replacing of the cutting insert.

Abstract: A vacuum device for a drilling hand tool includes a housing, a connection piece, a blower, and a collecting vessel. A drilling tool can be plugged into and through the connection device along a working axis. The blower conveys dust-laden air from the connection piece into the collecting vessel. The connection vessel includes a tray cartridge which can be removed from the housing, and a locking bar. The locking bar is hinged on the tray cartridge or on the housing and can pivot between a locking position and an unlocked position. When the locking bar is in the locking position, it presses the tray cartridge against the housing to provide pretensioning.

Abstract: A suction device with a hand-held power drill is disclosed. The suction device has a housing and a locking mechanism for fastening the housing to a housing of the hand-held power drill. The suction device furthermore has a fan motor and a controller for the fan motor. The controller contains a sensor for detecting the operating state of an electric motor of the hand-held power tool. The controller is configured to activate the fan motor when the electric motor is in a rotating state of operation.

Abstract: A cutting insert-shim assembly that has a cutting insert with a bottom surface and a plurality of interior coolant passages wherein each interior coolant passage has a coolant inlet in the bottom surface of the cutting insert. The shim has a first side surface and a second side surface and contains a cavity, which communicates with the coolant conduit. The cavity defines a first opening in the first side surface and a second opening in the second side surface. When the shim is in a first condition, the first side surface contacts the bottom surface of the cutting insert and the first opening provides a first level of coolant communication to the interior coolant passages in the cutting insert. When the shim is in a second condition, the second side surface contacts the bottom surface of the cutting insert and the second opening provides a second level of coolant communication to the interior coolant passages in the cutting insert.

Abstract: A tool holder includes: a shank portion gripped by a main shaft; a tool attachment portion having an insertion port into which a tool is inserted in a tip end surface thereof; a cover having a tubular wall that covers an outer periphery of the tool attachment portion and a bottom surface that covers the tip end surface of the tool attachment portion; a bearing provided between the tubular wall of the cover and the tool attachment portion; and a stopper that prevents the cover from co-rotating with the tool attachment portion. A through hole penetrated by the tool and an ejection port disposed on a periphery of the through hole in order to eject the coolant toward the tool are provided in the bottom surface of the cover.

Abstract: A water feed apparatus (20) of the present invention includes a water storage tank (40) that stores water for feeding, a pump unit (50) that feeds gas with a pressure to the water storage tank (40), and an adapter (30) that couples between the water storage tank (40) and a core drill (1). The pump unit (50) has a gripper portion (51) whose internal space is enlargingly and reducingly deformable by a gripping operation by an operator to feed the gas to the water storage tank (40). The adapter (30) has a drill-mounting portion (31b) for mounting on the core drill (1), a tank mounting portion (34) where the water storage tank (40) is mounted, a water passage (37) that connects between the drill-mounting portion (31b) and the tank mounting portion (34), and a valve unit (33) that opens and closes the water passage (37).

Abstract: A fluid delivery system for use with a cutting tool used to machine an opening in a workpiece may include a delivery tube having an outlet to be aligned with a cutting tool and a fluid supply coupled to the delivery tube to provide fluid to the delivery tube under pressure. The delivery tube is aligned with the workpiece at a side of the opening opposite to side through which the cutting tool is initially inserted and supplies fluid to the workpiece and cutting tool in a direction generally opposite to the direction that the cutting tool is inserted into the workpiece.

Abstract: A fluid distribution apparatus for use in a cutting or shaping machine to facilitate chip breaking and cooling a variety of different diameter gear tools and workpieces when machining a workpiece is described. The fluid distribution apparatus includes a manifold block having a top face and a bottom face, with the top face including a seating surface adapted to be seated against an attachment surface of the machine. The apparatus also includes mounting holes in the top face for fastening engagement to the cutting machine, at least one inlet passage for connection to at least one fluid delivery nozzle, and a plurality of outlet flow passages.

Abstract: Embodiments of the invention relate to a reamer for machining a workpiece by chip removal. Embodiments of the reamer can incorporate a holder, having a receiving opening disposed on a workpiece-side end face and having an internal thread, a holder bore extending inside the holder in a longitudinal direction thereof and opening into the receiving opening, an exchangeable head, having a cutting-nose element having a plurality of cutting noses disposed in a distributed manner in a circumferential direction, an exchangeable-head shank having an external thread corresponding to the internal thread disposed in the receiving opening, a bearing contact element disposed between the cutting-nose element and the exchangeable-head shank and having a first bearing contact surface for bearing contact on a first support surface disposed on the workpiece-side end face, with an exchangeable-head bore corresponding to the holder bore extends through the exchangeable head in a longitudinal direction thereof.

Abstract: A cylindrical rotating tool comprises a major diameter portion having formed therein an internal fluid passage, a minor diameter portion provided in front of the major diameter portion, and a tip attached to the front of the minor diameter portion. When seen from behind the central axis line, an inner circumference of an outlet of the internal fluid passage intersects with an outer circumference of the minor diameter portion. At the site of the outlet, a notch is formed on an outer circumferential surface of the minor diameter portion. An inclined portion of the notch is formed obliquely so that the distance from the central axis line to the inclined portion on further forward of the minor diameter portion becomes larger than the distance from the central axis line to the inclined portion on a closest position on the entire circumference of the outlet to the central axis line.

Abstract: A shank attachment structure which may supply coolant even if a drill without a center pin is attached. A shank can be attached to a shank attachment hole with a single motion. The outer diameter of the shank can be inserted into the shank attachment hole. A chamfered portion is formed around an edge of a base end, and an elongated concave portion is formed on a tip end. A coolant hole is formed on a base end of the shank attachment hole, and a valve body is disposed in the hole. A sealing member is disposed adjacent to the tip end side. A first sleeve is disposed such that a base of the shank moves the first sleeve, so that a base of the sleeve separates from the sealing member; and when the shank is not in contact with the tip, an outer peripheral surface of the first sleeve moves the engaging member radially outwardly.

Abstract: A micro-machine powered by an electric motor and/or a gas turbine drive and capable of rotation speeds to 1,500,000 rpm is disclosed. The micro-machine may include a rotating spindle which is constructed, balanced and arranged to provide a tool holder function and may incorporate a portion of the drive system. The other portion of the drive system is incorporated in a machine housing. The housing locates and supports at least one foil thrust bearing and at least one foil journal bearing to support the spindle. The housing and the bearings may be split into at least two parts and reassembled and the housing incorporates a gas reservoir and gas distribution channels for forced gas cooling of the bearings. In one embodiment of a foil journal bearing, a plurality of overlapping top foil segments supported by individual bump foil segments consisting of generally uniformly-spaced ridges and flats are secured within a housing.

Abstract: An inner cylinder, a pin, and a valve body are movable in a reciprocating manner in a direction along the rotational axis in relation to an oil supply pipe. At a proximate position, where a cutter attaching portion is close to the oil supply pipe, a rod portion of the valve body is supported by a pressure receiving portion of the holder inner cylinder due to the elastic force of a compression coil spring, such that an opening-closing portion of the valve body closes a valve port of the oil supply pipe. At a separated position, where the cutter attaching portion is separated from the oil supply pipe, the rod portion of the valve body is supported by the upper end of the pin due to the elastic force of the compression coil spring, instead of the pressure receiving portion, such that the opening-closing portion opens the valve port.

Abstract: A system with a container (1) and a tool holder (20) having two ends (21, 22). One of the ends of the tool holder is adapted to be secured to a machine tool and the other end is adapted for attaching a cutting edge or a cutting edge carrying unit. The tool holder includes an internal cavity (23) surrounded by a cavity wall. The cavity accommodates the container. One end of the cavity is adapted for connection to a supply for a cooling medium and the other end is connected to an outlet for cooling medium. The cavity furthermore includes an opening (25) for installation of the container. At least one gap for leading the cooling medium is formed between the container and the cavity wall. The container can be installed in a machine tool, and the container can be used to accommodate one or several sensors for measuring parameters or for receiving a damping system.

Abstract: A high speed handheld power drill includes a housing with a motor, a chuck rotationally driven by the motor, and a drill bit clamped in the chuck. A pressure foot is mounted on the housing for coaxial rotation about the drill bit and lockable in a selectable angular position relative to the housing. A drill guide is slidably disposed within the pressure foot at an outer end thereof and biased for coaxial sliding movement between the drill bit and pressure foot. A vacuum cuttings pickup and coolant fluid delivery tool is coupled to the drill guide and arranged to deliver coolant fluid to the drill bit and to remove drill cuttings and coolant fluid and vapor therefrom during drilling. A coolant fluid reservoir is coupled to the drill motor housing and adapted to deliver selectably metered amounts of coolant fluid to the cuttings pickup and coolant delivery tool during drilling.

Abstract: An apparatus for a drilling operation. In one advantageous embodiment, the drilling operation includes a motor, a rotary sensor, and a controller connected to the rotary sensor. The rotary sensor may be capable of generating a signal in response to rotary movement of the drill motor. The controller may be capable of monitoring a speed of the air motor from the signal generated by the rotary sensor and may be capable of identifying a change from a current layer in a stackup to a new layer in the stackup using the signal.

Abstract: A device for supplying coolant into a shank of a rotary tool as well as a rotary tool, in particular a drill. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Abstract: The present invention is a coring unit adapted to be engaged to an articulated arm, to reduce the labor necessary for on-site coring of sewage and water pipes. The coring unit includes a frame containing the components of the unit, which include a coring bit, a coring bit motor, a traverse mechanism, and a stabilizer for allowing ready orientation of the coring unit with respect to an object being cored. The unit may also be provided with a traverse motor for driving the coring bit into an object being cored, and for withdrawing the coring bit once a core has been formed. The coring unit may additionally be adapted to allow for remote operation of the coring unit.

Abstract: A suction cup dust extractor for a drill including a housing; a drill collar attached to the housing, having a drill passage formed through it; a recess formed by the walls of the housing having an opening and which, in use, locates against a work piece to create a chamber; an aperture located on the housing through which air can pass; and an air passage formed within the housing which enables air to pass from the drill passage to the aperture.

Abstract: A suction cup dust extractor for a drill including a housing; a drill collar having a drill passage formed through it; a recess formed by the walls of the housing having an opening and which, in use, locates against a work piece to create a chamber; an aperture located on the housing through which air can pass; at least one first air passage formed within the housing which connects to the aperture; and at least one second air passage formed within the housing which enables air to pass from the recess to the aperture; the collar being releasably attachable to the housing, the at least one first air passage making fluid connection with the drill passage when it is attached to the housing to enable air to pass from the drill passage to the aperture.

Abstract: A hand-held water drill system including a drill coupled to a shank to transmit torque to a drill bit. A solution delivery device substantially surrounding the shank provides solution to the drill bit. The shank freely rotates within the solution delivery device. The solution delivery device includes a handle having a channel. A solution delivery control is provided to operate the valve to allow flow control of the solution to the drill bit distal end while allowing the user to maintain a grip on the handle. Additionally, the solution delivery device is positioned and constructed to provide improved control of the position of the drill bit during use.

Abstract: There is provided a water treatment pad for a drilling tool capable of being fixed quickly and firmly. The present invention provides a water treatment pad for a drilling tool, which is installed on a drilling surface of an object to be drilled when a hole is drilled in the object by using the rotating drill tool while machining water is supplied. The water treatment pad includes a substantially cylindrical pad body having a drain in the side surface thereof and mounted in a manner that surrounds the drilling tool, and a cylindrical diffuser ring detachably fixed in the pad body in a manner that surrounds the drilling tool to accelerate a fluid therein and release the fluid to the outside. On the end surface of the diffuser ring which comes into contact with the drilling surface, convex-shaped blades the transverse cross section of which has an airfoil profile tilting in the rotative direction of the drilling tool are arranged in an aligned manner.

Abstract: A metal cutting system with a tool holder, a shim, an insert with a top depression, a top piece and a clamp. A rake face cooling channel for fluid delivery is formed between the top piece and the depression in the insert. A primary discharge slot at the end of the rake face cooling channel delivers fluid from below the cutting edge of the insert. A second cooling channel for delivery of fluid to the flank face is formed between the insert and the shim or is formed between the shim and the tool holder with a portion of the cooling channel passing through the shim.

Abstract: A boring tool for boring cylinder bores (6), with a tool holder (8) and a tool head (4) with a cutting edge carrier for at least one cutting edge (3) and with a rotary drive for driving the at least one cutting edge (3). The cutting edge carrier is provided with a first, preferably hydraulic, adjusting device for the adjustment of a variable cutting radius of the cutting edge (3), a ring module for first support rails (1), which concentrically surrounds the tool head (4), a second adjusting device for the variable radial adjustment of the supporting radius of the first support rails (1), and a third adjusting device for variable radial adjustment of a supporting radius of second support rails (2). The tool head (4) is axially moveable within the ring module. A method for boring cylinder bores (6) involving the use of the boring tool is disclosed as well.

Abstract: This invention generally pertains to a self-reversing tapping apparatus system, and more particularly, embodiments of this system include an improved coolant system, a reduction of the components which reverse rotational direction, and provides a modular tapping apparatus system.

Abstract: Nibbling mechanism (100) for producing a plurality of indented surfaces within a cavity within a construction material (160) including a tube, a plurality of cutters and a cutter moving mechanism, each of the cutters (104) being coupled with the tube (120), the tube (120) being rotatable by a power shaft rotator, the tube including a tube longitudinal axis, the plurality of cutters (104) producing the plurality of indented surfaces within the cavity, the cutter moving mechanism forcing the plurality of cutters (104) in a radial direction away from the tube longitudinal axis toward the cavity, thereby producing the plurality of indented surfaces, wherein the cutter moving mechanism can be inserted into the tube (120).

Abstract: The apparatus for supplying a cooling fluid to the outer surface of a tool consists of a guide element which surrounds the tool shank and gives rise to a laminar coolant flow.

Abstract: The invention relates to a multi-edged machining tool for the post-machining or precision machining of bores. The tool has at least one cutting insert with a pre-determined nominal diameter measurement and with cutting edges that are distributed substantially uniformly around the periphery, in addition to a guide body assembly that is axially offset in relation to said edges. The guide body assembly can be an integral component of a substantially cylindrical guide body that consists of a solid carbide. In some embodiments, said guide body forms at least n helical guide ribs which are equidistant around the periphery and which have a nominal diameter substantially smaller than the nominal diameter measurement of the cutting insert by a value equating to double the dimension of the lubricant gap that is formed during the operation of the tool.

Abstract: A damping tool holder, such as a boring head, a chuck, or a milling cutting arbor, integrates a damping device (2), in the form of an elongated body. The damping device (2) is housed in a mounting body (3), connected by one end to the tool-holder body (1) and having at its other end an end fitting (4) for mounting a tool, whereby the mounting body (3) is equipped with at least one lubricant feed pipe (32), emptying at its front end into the end fitting (4) for mounting a tool and connected at its other end to a circular groove (102) for distributing lubricant that is provided on the front surface of the tool holder (1).

Abstract: A main body of a machine tool is covered with a cover. A ceiling portion of the cover that is situated over a spindle motor is provided with an opening portion. The cover is provided with hanging portions that hang down from the opening portion with a predetermined clearance from side surfaces of the spindle motor other than the rear surface. Air that is mixed with a misty cutting fluid in a space inside the cover is sucked in through a suction pipe by a mist collector. The outside air flows into the space inside the cover through the clearance. The outside air that passes through the clearance is driven to flow through vents by a built-in cooling fan of the spindle motor, thereby cooling the motor, and is then discharged to the outside. In consequence, the temperature in the space inside the cover can never be increased by heating of the spindle motor.

Abstract: A metal cutting system with a tool holder, a shim, an insert with a top depression, a top piece and a clamp. A rake face cooling channel for fluid delivery is formed between the top piece and the depression in the insert. A primary discharge slot at the end of the rake face cooling channel delivers fluid from below the cutting edge of the insert. A second cooling channel for delivery of fluid to the flank face is formed between the insert and the shim or is formed between the shim and the tool holder with a portion of the cooling channel passing through the shim.

Abstract: Machining of aluminum workpieces with diamond or diamond-like carbon-surface coated tools may be conducted in an atmosphere containing hydrogen gas at a partial pressure effective for hydrogen to react with carbon atoms at the surface to form C—H bonds that resist adherence of aluminum to the tool surface. Suitably, hydrogen or a hydrogen-containing gas mixture is confined at the interface of tool and workpieces at the machining site. Hydrogen partial pressure may be determined for a tool-workpiece-machining temperature combination by calculation or experiment.

Abstract: A drilling tool is disclosed. The drilling tool has a shaft and a pot-shaped base body. Chisel cutters are inserted into the annular front surface of the base body which is open on a drilling side. At least one suction opening is provided offset radially from an axis of the hammer core bit in the base of the base body facing away from the drilling side. The drilling dust can be suctioned out of the base body through the suction openings.

Abstract: An auxiliary device for an electrical work machine is provided. The auxiliary device can be attached to the electrical work machine, and the electrical work machine can be equipped with a tool in a tool holder. The auxiliary device comprises a housing comprising a handle and an attaching device. The housing can be attached to the electrical work machine with the attaching device. The housing comprises a handling section, which is disposed next to the attaching device, and which comprises an opening, which allows at least the tool holder to be freely accessible from the sides. The handle is permanently connected to the handling section.

Abstract: A coolant distributor for use with a cutting head of a machine tool that is adapted to be rotated about a rotational axis. The coolant distributor comprises a generally cylindrical body adapted to be coupled to the cutting head about the rotational axis, the generally cylindrical body having a first end and an opposite second end, the first end being disposed adjacent the cutting head when the generally cylindrical body is coupled to the cutting head. At least one feed passage is formed in the generally cylindrical body, the feed passage having a first end disposed proximate the first end of the generally cylindrical body and a second end disposed proximate the second end of the generally cylindrical body. A deflecting element is disposed in the feed passage proximate the second end of the feed passage. An outflow passage is connected to the feed passage and disposed obliquely to the rotational axis.

Abstract: A drilling machine includes a motor housing, a gear box housing, a shaft driven by the motor and extending into the gear box housing, a drilling shaft extending through the gear box housing and having an outgoing channel arranged in the drilling shaft for supply/removal of a drill flow medium to/from a tool part that is connectable to the drilling shaft, a drill flow medium room, between the motor housing and gear box housing, that can be supplied with drill flow medium when the drilling machine is in operation, and an incoming drill flow medium conduit for the supply/removal of the drill flow medium to/from the drill flow medium room. The motor housing includes a detachable end cover which forms the rear unit of the drilling machine. The gear box housing includes a detachable end cover that forms the front unit of the drilling machine.

Abstract: A heat sink for a drill press includes a main body having a receiving chamber which has a top provided with a limit tube, a guide unit mounted on the main body, and a sponge mounted in the main body. The guide unit includes an outer tube mounted on the receiving chamber and protruding from the limit tube, a plurality of inner tubes laminating each other and mounted in the outer tube, and a positioning tube mounted between the limit tube and the outer tube and abutting the inner tubes to position the inner tubes in the outer tube. Thus, the guide unit has an adjustable size by provision of the inner tubes and the outer tube so as to fit drill bits of different sizes and specifications, thereby enhancing the versatility of the heat sink.

Abstract: A cutting insert for use in chipforming and material removal from a workpiece wherein coolant is supplied to the cutting insert from a coolant source. The cutting insert includes at least one discrete cutting location and at least one distinct internal channel that corresponds to the cutting location. The internal channel has an inlet to receive coolant and an outlet to exit coolant. The outlet is proximate to the cutting location, and the inlet is radial inward of the outlet.

Abstract: The present invention provides a cartridge-type spindle device having an easily separable structure despite the fact that it comprises a rotary joint for a through spindle coolant device. In the cartridge replacement type spindle device (11), front bearings of the spindle are built in a front housing (23) and rear bearings of the spindle (15) are supported on a rear housing (25) so that, when the front housing (23) is separated from the rear housing (25), the front bearings (17a, 17b), the spindle (15), and the rear bearings (19a, 19b) can be separated from the rear housing (25) integrally with the front housing (23). The rotary joint is disposed in a piston (63) of an unclamp means for unclamping a tool (21, T) mounted to the forward end of the spindle (15), so that a draw bar (51) accompanied by a seal ring can be separated from the rear housing (25) and the rotary joint together with the spindle (15) and the front housing (23).

Abstract: A suction cup dust extractor for a drill having a housing; a drill collar attached to the housing, having a drill passage formed through it; a recess formed by the walls of the housing having an opening which, in use, locates against a work piece to create a chamber; a single aperture located on the housing through which air can pass; at least one first air passage formed within the housing which connects between the aperture and the drill passage and which enables air to pass from the drill passage to the aperture; and at least one second air passage formed within the housing which connects between the recess and the at least one first air passage inside of the housing which enables air to pass from the recess the aperture wherein there is further provided a connection collar which is connected to the aperture via a flexible tube only; wherein the aperture has a longitudinal axis, and the drill collar has a longitudinal axis, the longitudinal axis of the aperture being orientated substantially perpendicularl

Abstract: A suction cup dust extractor for a drill having a housing; a drill collar attached to the housing, having a drill passage formed through it; a recess formed by the walls of the housing having an opening and which, in use, locates against a work piece to create a chamber; a single aperture located on the housing through which air can pass; at least one first air passage formed by the walls of the housing which connects between the drill and the aperture to enable air to pass from the drill passage to the aperture; and at least one second air passage formed within the housing which connects between the recess and the at least one first air passage and which enables air to pass from the recess to the aperture via a part of the at least one first air passage; characterized in that there is a dividing wall which forms both one of the walls of the recess and one of the walls of the first passage, the at least one second passage being an aperture formed through that wall.