Abstract: A tool can include a tool body defining a recess defining a recess depth measured in a radial direction from an outer diameter of the tool body; and a detent member coupled to the tool body, the detent member including a leg extending from the tool body and sized to be received within the recess of the tool body upon one of deformation and movement of the leg at least partly in a radially inward direction, the leg biased in a radially outward direction by one of a wall of the recess and a biasing element of the tool, the leg configured to catch upon a portion of a pipe coupon surrounding a drilled hole in the pipe coupon to facilitate movement of the pipe coupon with the tool.

Abstract: An upper drill tool including a central chuck, an upper component, a lower component and a coupling assembly. The central chuck has a chuck base and a chuck structurally configured to retain a drill bit. The upper component is attached to the central chuck and has a lower stop surface. The lower component has a central body and an outer ring that threadedly engages the central body, with the outer ring having an upper stop. The coupling assembly is configured to facilitate the slidable movement of the lower component from a first orientation wherein the upper stop is spaced apart from the lower stop surface and a second orientation wherein the upper stop is in abutting engagement with the lower stop surface, with the first orientation and the second orientation defining a stroke.

Abstract: A dust collection system for a power tool can collect, with an ordinary bit, dust with a flexible hose connected. A dust collection system for a power tool includes a power tool to receive a tip tool protruding frontward and including a tool body, a cylindrical first dust collection attachment attachable to the tool body and covering the tip tool over its entire circumference with the first dust collection attachment being attached, a second dust collection attachment attachable to the tool body and including a dust collector, and a flexible hose to connect the first dust collection attachment and the second dust collection attachment to collect dust sucked through the first dust collection attachment into the dust collector included in the second dust collection attachment.

Abstract: A dust collector operable to collect dust and debris generated during operation of a power tool includes a mounting base configured to couple to the power tool. The mounting base defines a longitudinal axis. The dust collector also includes a shroud extending from the mounting base. The shroud includes a first end adjacent the mounting base, a second end operable to contact a workpiece, a sleeve extending between the first end and the second end, and a spring biasing the second end away from the first end. The second end is movable relative to the first end against the spring.

Abstract: A coring unit comprises a clamping arrangement for releasably attaching the coring unit to a structure into which a core is to be cut. A bit is provided comprising an elongated tubular body having a cutting surface at a first circular end of the elongated tubular body for cutting the core. The unit includes a drive system adapted to rotate and linearly translate the bit so that the drive system rotates the bit and moves the bit with respect to the clamping arrangement to advance and retreat the bit through the structure to cut the core from the structure. A method of using the coring unit is also described. The unit and method permit an accurate, reliable, safe, and reproducible cutting of a hole in a structure. The unit and method find particular application in cutting holes in studs of wood frame structures to accommodate services such as wires and piping.

Abstract: A method and apparatus. The apparatus comprises a first portion of a tool and a second portion of the tool. The first portion of the tool has a first surface. The first surface has a shape that is complementary to a first portion of a part. The second portion has at least one of a second surface configured to be recessed from a second portion of the part or a hollow portion.

Abstract: An example of a guard for a power tool includes a body that defines an interior space configured to receive the power tool. The body is configured to cover at least a moving portion of the power tool. The body includes an aperture formed through a bottom face of the body and a fastener configured to pass through the aperture and secure the guard to the power tool.

Abstract: An optical mining apparatus comprising: a light weight solar reflector; optics for controlling the delivery of concentrated sun light onto the surface of a target; and a temperature controlled gas enclosure that contains the target; wherein said solar reflector is oriented to reflect sun light onto said optics.

Abstract: An ingress-egress apparatus for protection of a surgical work site during removal of a surgical implant therefrom includes an inverted frustum surface having a sidewall defining: a bottom open area at a base portion of the frustum surface sidewall, and an opposing top open area at a top portion of the frustum surface sidewall. The top open area has a larger area than the bottom open area. The apparatus includes an ingress port located at the base portion of the frustum surface sidewall and an egress port located at the base portion of the frustum surface sidewall. During surgical removal of the surgical implant using a surgical burr, the apparatus can be used to irrigate the work site, thereby cooling it and protecting it from damage, and further removing metal implant particles generated during burring.

Abstract: A food shield for use in a restaurant or food service institution includes a pair of partially overlapping upper and lower transparent panels, first and second locking assemblies connected to and supporting one lateral side of each of the upper and lower transparent panels, and first and second non-locking assemblies connected to and supporting the opposite lateral side of each of the upper and lower transparent panels. Each of the first locking and non-locking assemblies, which supports the upper transparent panel, is mountable to a respective vertical support post. The food shield is transformable into three different settings. In a cafeteria setting, the upper and lower transparent panels overlap each other to provide a full length barrier in front of food product being displayed. In a self-serve setting, the lower transparent panel is pivoted inwardly such that it resides behind the upper transparent panel.

Abstract: A vacuum dust extraction apparatus for a percussive air tool contains and extracts workplace dust created by the impacting action of the air tool's implement. The apparatus includes a clamshell adapter constructed as two halves that are oppositely disposed about the air tool's retainer, and joined to enclose the retainer, and a tubular dust bellows fastened to the outboard end of the joined clamshell halves. The clamshell adaptor includes an integral exhaust port, and an industrial vacuum coupled to the exhaust port via a flexible suction/vacuum hose creates suction in the bellows for extracting airborne dust created by percussive action of the implement on a workpiece. Suction loss through the clamshell adaptor is minimized by a sealing element that bridges a gap between the interior periphery of the clamshell adaptor and the exterior periphery of the air tool's retainer.

Abstract: A resin composition includes a cellulose ester compound (A); polylactic acid (B); and a polystyrene (meth)acrylate-based compound (C) containing 10% by mass or more and 40% by mass or less of a constituent unit derived from styrene.

Abstract: An apparatus configured to be mounted to a power tool includes a hollow shaft configured to surround an operating element of the power tool; a substantially flat sled, in which a bottom surface of the sled is configured to interface with a working surface; and a guidance fin protruding from the bottom surface of the sled, wherein the guidance fin is configured to guide the apparatus along an operating path. The apparatus may include at least one vacuum port attachment, which can be mounted to a top surface of the sled and/or may be built into a support member of the apparatus. The apparatus may include a clamp configured to mount the apparatus to the power tool. The power tool can be a rotary hammer drill.

Abstract: A core sampling and tapping assembly is disclosed that may be mounted to a cylindrical pipe. The assembly includes a nozzle having an interior portion extending between an open distal end and a proximal end. The proximal end sealed to an upper saddle member and the upper saddle member coupled to a lower saddle member to clamp the pipe in between. The assembly further includes a tapping mandrel including a mandrel plate, the tapping mandrel extending through the interior portion and a core cutter fixedly coupled to the mandrel plate. The assembly further includes a pilot bit coupled to the mandrel plate and disposed within an interior cavity of the core cutter. The tapping mandrel adjacently aligns the core cutter and the pilot bit with an outer surface of the pipe and subsequently rotates the pilot bit and core cutter to collect a core sample from the pipe.

Abstract: A device for minimally invasive bone harvesting surgery described herein includes a cutter, a sleeve, and a drive control system. The cutter includes a head and a spiral conveying portion. An external screw thread is disposed on a surface of the spiral conveying portion, the sleeve is sleeved on the cutter, and the head and at least a part of the screw thread of the surface of the spiral conveying portion are exposed from the sleeve. The drive control system drives and controls the cutter to work. The device for minimally invasive bone harvesting surgery in this invention only needs a very tiny skin incision and bone window, cuts or grinds cancellous bone to bone fragments and then conveys them through a screw thread channel, which realizes the oriented conveying of the harvested bone.

Abstract: A hand-held power-tool device includes at least one coupling device, which has at least one contact receiving region, and which is configured to couple an optional additional module to at least one energy supply unit, in at least one operating state. The at least one contact receiving region has (i) at least one receiving opening configured to receive a corresponding contact element of the optional additional module, and (ii) at least one dirt removal opening.

Abstract: Certain embodiments of the invention relate to a surgical procedure resulting in the fusion of transverse processes. The disclosure herein presents novel approaches for accessing transverse processes of the spine, novel methods for the delivery of fusion material for the fusion of said transverse processes, and novel tools to facilitate the procedure. Certain embodiments of the invention include a graft delivery assembly, which has a delivery shaft, delivery sheath, and at least one curved rod. Bony material is position with a graft delivery assembly, in which retraction of the delivery shaft or sheath places the bone fusion material to the fusion site. The graft delivery assembly further includes features to decorticate and prepare the bone surface for fusion.

Abstract: A groove machining head has a dust collecting hood 40 having a suction port in the vicinity where tools 32 protrude from a bottom plate 33 of the groove machining head. When performing groove machining on a substrate W using the groove machining head 30, a blower 35 sucks air inside the dust collecting hood 40 through ducts 34. Doing so can suck dust produced by the groove machining through the suction port of the dust collecting hood 40 before attachment of the dust on the substrate W.

Abstract: The fan screw nut for removing scraps includes a screwing hub, multiple fan blades and a frame. The screwing hub has an outer periphery. The fan blades are spiral in shaped and are formed around the outer periphery of the screwing hub. A flux space is formed between each fan blade. The frame is formed integratedly on an outer periphery of a front side of the fan blades. Multiple through holes are formed between the inner side of the frame and the flux spaces for air flowing. The fan screw can be introduced air into flux space via through holes to blow up scraps that generated from cutting a work piece.

Abstract: An assembly for the removal of particulate residue generated by a CNC machine including a first means mounted on a gantry thereof for directing a stream of air downwardly toward a worktable thereof and at a degree toward a tool holder thereof effective to form an air current across a forwardly disposed opening of such gantry and entrain particulate residue, a second means mounted on such gantry rearwardly of such first means for directing a stream of air downwardly toward such worktable and to a degree toward such tool holder effective to form an air curtain across a rearwardly disposed opening of such gantry and entrain particulate residue and means mounted on such gantry for exhausting air entrained with such particulate residue from within such gantry between such air curtain.

Abstract: A case preparation and/or trimming assembly. The assembly may include a case shoulder engagement surface and a cutter. The spacing between the case shoulder engagement surface and the cutter is adjustable for changing the amount the cutter trims from a case. A case body engaging member may have an adjustable inner diameter for engaging bodies of cases having different diameters. A kit includes a case trimming assembly and a plurality of interchangeable case bearings (e.g., collets and/or bushings) adapted for engaging cases of different sizes for guiding the cases into proper position with respect to a cutter. The case preparation apparatus includes a support member for supporting a trimming assembly of the apparatus in an upwardly inclined orientation. The case preparation apparatus includes a storage container. Associated methods are also disclosed.

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: It is an object of the invention to provide a technique that contributes to rationalization of dust collection, in a dust collecting attachment for use on a power tool. Dust collecting attachments 250, 350 are used on a power tool 201 having a tool body 203, a tool bit 209 which can be coupled to a front end region of the tool body 203, and an auxiliary handle 208 attached to the tool body 203. The dust collecting attachments 250, 350 include dust collecting members 251, 351, respectively, which can be attached to the auxiliary handle 208 in such a manner as to surround the front end region of the tool body 203 around a longitudinal axis of the front end region in order to collect dust generated during operation by the power tool 201, and a connecting hose 273 for connecting the dust collecting members 251, 351 to a dust collector.

Abstract: A technique for allowing a user to operate an operating member disposed in a front end region of a power tool in the state in which a dust collecting attachment designed to be attached to the front end region of the power tool is left attached to the power tool. The dust collecting attachment is used on a power tool having an operating member for removal and/or bit angle setting of a tool bit coupled to a front end region of a tool body. The dust collecting attachment has a dust collecting member which can be attached to the front end region of the tool body. The dust collecting member has an opening formed in a region which faces the operating member in the state in which the dust collecting member is attached to the tool body, and the operating member can be operated by user's finger through the opening.

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: Devices, systems, and methods are provided for cutting bone and collecting bone debris. A disclosed device includes a receptacle having a proximal opening, a cutting tool having a connector on a proximal end, and a space between the cutting tool and receptacle. In use, bone debris produced by the cutting tool is received by the receptacle into the space. A distal opening of the receptacle may have dimensions corresponding to those of the cutting tool. The receptacle may be shaped so that it does not extend beyond the outer periphery of the cutting tool.

Abstract: A dust box joined to a dust collecting device is formed of a box body, and a lid body that is joined to the box body by a hinge and can open and close an opening of the box body, and a main filter and a pre-filter are attached to the lid body.

Abstract: The present invention provides a device and method for independently anchoring a core in a core drilling operation prior to, during and after the drilling operation, so that upon severance of the core from its surrounding structure, free fall of the core is prevented and safety of nearby workers is protected. The device comprises a hollow core drive shaft and a structurally separate, independent anchoring device positioned within the central axis of the hollow core drive shaft and secured to the core. The device and method provides complete physical accessibility and visibility to the core at all times during a drilling operation. The core can thus be securely anchored from the top side of a structure without the need to brace the underneath side of the structure and having the core fall down upon severance from the structure.

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.

Abstract: A dust collecting device is provided which is capable of preventing static charge while rationally collecting dust generated during operation. A dust collecting device is removably attached to a power tool and can be carried together with the power tool, and collects dust generated when a predetermined operation is performed on a workpiece by driving a tool bit coupled to the power tool. Further, the dust collecting device has a dust suction region that sucks dust generated during operation in response to the operation of the tool bit, a dust transfer region that transfers the dust sucked in the dust suction region, and a dust storage region that communicates with the dust transfer region and stores the dust. Furthermore, the dust collecting device has a grounding member through which static charge on the dust is dissipated.

Abstract: A quick adjust ratcheting pocket hole jig is presented. The pocket hole jig has a base with a removable upright connected thereto. A guide assembly is slidably received within the upright. Removable and replaceable side supports are connected to the base by way of a dove tail joint. Removable and replaceable adjustable stops are connected to the base by way of key holes. A clamp assembly is connected to the base having a handle portion and a clamp follower. The clamp follower has a ratcheting mechanism and a compressible plunger assembly. The clamp follower can quickly be adjusted using a button on the clamp follower that disengages the ratcheting member such that it can be quickly adjusted. When the handle is operated, it draws the clamp follower towards the upright and guide assembly compressing the spring loaded plunger assembly thereby quickly and tightly and adjustably holding a workpiece therebetween.

Abstract: A dust collecting device disposed circumferentially around a roof tool and in association with a roof drill bit and slidable thereon for collecting and removing dust generated during a dry drilling operation. The dust collecting device comprises a cylinder member, a bushing, and a mounting assembly comprising a top washer, a rubber insert, and a bottom washer. Another aspect of the invention provides a dust collecting device comprising a cylinder member, a bushing, and a mounting assembly comprising a disk and clips. The rubber insert and the clips resist movement of the dust collecting device along the drill steel of the roof tool during the drilling operation.

Abstract: A power tool dust collecting device includes a fan chamber and a dust collecting chamber. The fan chamber is formed in a housing which is mountable on a hammer drill and in which a suction opening is provided protrudingly. The fan chamber houses a fan that rotates in accordance with driving of a motor. The dust collecting chamber is formed on an upstream side of the fan chamber. Mounted on the dust collecting chamber is a filter through which passes air that has been sucked up from the suction opening by the rotation of the fan and which collects dust included in the air. An air pumping unit that pumps air from a downstream side of the filter toward an upstream side is provided inside the housing.

Abstract: An apparatus and system comprises a pole having a top end and a bottom end. The top end is used adjacent a ceiling. The bottom end is used by an installer who is standing on the ground below the ceiling. The present invention is intended to be “modular,” the top and bottom ends being like-configured such that either end can be used as the top end or as the bottom end. Exemplary accessories are shown and described, each of which is disposed in a top end position. There are two types of accessory items contemplated by this invention. First, are fastening tools which are, for the most part, common utilitarian tools used with some sort of specific adapter and/or coupler. Second, there are proprietary accessories, which include offset couplings which can be used to drill and then impact or screw/torque a fastener into an aperture following drilling.

Abstract: An adjustable hole cutter for cutting a hole with a predetermined diameter in sheet or panel material includes a blade holder that moves along a track or slot to alter a diameter of the cut hole; a blade arc adjuster coupled to the blade holder; and one or more replaceable blade segments coupled to the blade holder.

Abstract: The present disclosure describes and teaches a drill safety system including a magnetic unit, a vacuum unit, and an improved hole saw drill set. The various parts of the drill safety system may be used individually or in combination with one another. The user may use the magnetic unit to surround the drilling site so that metal drill shavings on the drill surface may be collected by the magnetic unit. In addition, the magnetic unit includes a flippable top mechanism, allowing convenient disposal of the debris. The vacuum unit is fitted to the inner surface of the drilling site, collecting debris that fall through. The improved hole saw prevents over-penetrating by the drill, reducing the likelihood of damaging equipments underneath the drill site. This makes the drill particularly suitable for drilling holes during electrical work.

Abstract: A nozzle removes by suction dust and chips from a drilling machine in an industrial plant. The nozzle has a first tubular portion for connection to a suction tube communicating with an opposite second tubular portion with an intake opening. An outer flange extends transversely from an intermediate position between the first and second tubular portions. The intake opening is directed in a lateral direction, parallel to the transverse direction of the flange. A magnetic element is incorporated in the flange. The nozzle can be applied to a drilling template having cylindrical through-openings in which respective bushings made of ferromagnetic material are fixed. When the second tubular portion is inserted through a cylindrical bushing, the magnetic element acts on the bushing, opposing axial and rotational movements of the nozzle.

Abstract: A method of using a hand-held power tool having a debris removal attachment is provided. The method includes providing a hand-held power tool having an output shaft and selectively coupling an extension shaft to the output shaft. The method also includes coupling a first impeller to the extension shaft and providing a housing adjacent the first impeller. The method further includes rotating the first impeller to generate a pressure differential sufficient to draw debris into the housing. The extension shaft has a first end and a second end, the first end configured to couple to the output shaft of the hand-held power tool, and the second end configured to couple to a tool bit.

Abstract: A system and method for capturing resultant dust from power tool operation are disclosed. The system comprises a device that includes a housing with a substantially cylindrical shape. The housing has a first end that tapers to an opening for a tool bit and at least one suction port that opens into an interior volume of the housing. The housing has a second end configured to couple to a power tool. An air intake passage attaches to the exterior surface of the housing body such that an interior volume of the air intake passage connects to an interior volume of the housing. An exit passage is coupled to the air intake passage and is configured to couple to a vacuum.

Abstract: A dust collecting case provided on a cutting machine for cutting a target object includes an outer case member and an inner case member. The outer case member includes a bottom plate, a first side member extending from a peripheral edge of the bottom plate, and a suction port. The inner case member includes a second side member positioned inside the first side member, and an upper member provided between an upper portion of the first side member and an upper portion of the second side member such that the upper member closes from above a space surrounded by the first side member and the second side member. The second side member includes an inner peripheral surface that faces and surrounds an outer periphery of the target object. A gap is located in between an outer surface of the second side member and an inner surface of the first side member.

Abstract: A cutting assembly includes a cutting tool having a shank portion and a cutting portion extending axially from the shank portion, the cutting portion having a cavity extending axially therein forming an open end and defining a central axis. The cutting assembly also includes a collet disposed in the cavity for receiving and retaining a slug to be cut by the cutting portion in a workpiece after the cutting portion is withdrawn from the workpiece. The collet includes an inner contact surface with at least a portion of the inner contact surface disposed substantially non-parallel to the central axis for guiding the slug therein, and a slit extending through the collet for enabling the collet to move between an at-rest position and an expanded position to retain the slug therein.

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; an aperture located on the housing through which air can be sucked out by a suction device; a recess formed by the walls of the housing having an opening which, in use, locates against a work piece to create a chamber; at least one first air passage formed within the housing which enables air to pass from the drill passage to the aperture; at least one second air passage formed within the housing which enables air to pass from the recess to the aperture; and a manually operable valve mechanism mounted in the housing which is connected to the recess and which, when operated, allows air surrounding the housing to freely enter the recess when its opening is located against a work piece; characterized in that the housing further comprises a hand grip), the valve mechanism being mounted, at least in part, inside of the hand grip.

Abstract: A dust collector is disclosed for use with a drill bit or a depth stop that is coupled to a drill bit. The dust collector includes a rear attachment portion configured to be axially fixed to a drill bit or to a drill bit depth stop that is axially fixed to a drill bit. An intermediate non-collapsible portion is attached to a front end of the rear attachment portion. The intermediate non-collapsible portion defines a dust-collecting pocket and is structured to inhibit collapse as the drill bit is inserted into a workpiece. A front collapsible portion is attached to a front end of the intermediate non-collapsible portion and at least partially collapses as the drill bit is inserted into a workpiece.

Abstract: A depth gauge for use with a drill bit includes a body configured to receive a drill bit, a retention mechanism coupled to the body and configured to removably couple the body to the drill bit, and a cap configured to be removably coupled to the body. The cap can be coupled to the body in one of a first position relative to the body where the cap contacts a workpiece surface to prevent the drill bit from entering the workpiece more than a first depth, and a second position relative to the body where the cap contacts the workpiece surface to prevent the drill bit from entering the workpiece more than a second depth that is different from the first depth.

Abstract: A countersink cutter or drill/countersink combination or similar rotary cutter or assembly for drilling/countersinking or performing similar cutting operation to precise depths in various applications, including aerospace applications, uses a pneumatically driven pistol grip motor attached to a tool assembly or countersink tool assembly. The countersink tool assembly, which has a multi-fluted cutter, is coupled to and is coaxial with the spindle. The cutter can be preset to a precise depth at the back end of assembly through the slot or using gage stops on the guide rods fastened to brackets by setting the gage between gage stops and the bracket.

Abstract: A fastening nut for fastening a receiving body and a collet together is disclosed. The fastening nut comprises a main body having an outer surface, a first end, and a second end distal to the first end and a plurality of blades located radially on the outer surface of the main body, wherein each blade is at an angle to the second end. The fastening nut is attachable on the receiving body for coaxial retention of the collet. Furthermore, axial rotation of the fastening nut creates a suction proximate the second end of the fastening nut. In one embodiment of the fastening nut, the plurality of blades protrude axially past the second end of the main body in a direction away from the first end. A tool bit holding system and a system and method for machining specimens comprising the fastening nut are also disclosed.

Abstract: Hammer drills and similar devices have an ongoing dust and debris problem that is solved by a protector device covering the drill in a main body protector shielding a user from the materials. The protector device has an evacuation region on its underside with multi dimensional adapters for attaching hoses of varying sizes. Additionally, an insertable collapsible accordion cylinder assists in covering the debris falling from different size drills being used. A second embodiment has a circular saw dust protector attachment arranged as two half moons or 1/4 moon and 3/4 moon having a central cylinder at their respective tops that are to be held together with a mechanical latch.

Abstract: In a device for limiting the advance during a drilling operation, which can be used in conjunction with a hand drill or with an automatic manufacturing machine, the device comprising a housing with a stop cage and a spindle mounted rotatably and axially displaceably in the housing, and a stop which is adjustable in the axial direction being arranged for limiting the advance, the invention consists in that the stop cage (2a) comprises a pin fixed to the housing for breaking the chips, with a housing-side end and a free end, in such a way that it extends approximately parallel and directly adjacent to the workpiece surface and approximately radially from the outside towards the drilling tool in such a way that its free end almost touches the countersink. Damage to the surface of workpieces is prevented by the invention, so that corresponding refinishing is avoided. Moreover, the removal of the coiled chips from the drilling tool previously necessary after each drilling cycle is dispensed with.

Abstract: A core retaining device is provided for use with a core drill bit, which is adapted to cut a core from a material such as concrete. The core retaining device includes a core attachment mechanism for releasably connecting the core retaining device to the core. A bearing is connected to the core attachment mechanism and allows the drill bit to rotate while the core attachment mechanism remains statically connected to the core. A biasing arrangement operably connects between the drill bit and the core via the bearing, and axially biases the core away from the material preventing the core from slipping from the drill bit. The core retaining device further includes at least one auxiliary safety feature such as extensions which extend laterally outward from the drill bit.

Abstract: A countersink cutter or assembly for countersinking to precise depths in various applications, including aerospace applications, uses a pneumatically driven pistol grip motor attached to a countersink tool assembly. The countersink tool assembly, which has a multi-fluted cutter, is coupled to and is coaxial with the spindle. The cutter can be preset to a precise depth at the back end of assembly through the slot using a gage.