Abstract: An assembly to plug a leak in a flowline includes a plug configured to plug the leak in the flowline, which includes a circumferential surface and a longitudinal axis. A plug insertion subassembly supports the plug. The plug insertion subassembly can move the plug between the circumferential surface and the longitudinal axis of the flowline. An axial positioning subassembly supports the plug insertion subassembly. The axial positioning subassembly can move the plug insertion subassembly along the longitudinal axis of the flowline. A chain-operated rotational positioning subassembly supports the axial positioning subassembly. The rotational positioning subassembly can be attached to the flowline with the leak. The rotational positioning subassembly is movable and can move the axial positioning subassembly on the circumferential surface of the flowline.

Abstract: An automated method for restoring an end surface of a cylindrical component of a turbine engine by cutting a profile into the end surface is provided. A base of a cutting device is installed against an inner diameter of the cylindrical component. The base is the aligned to the end surface. A cutting head of the cutting device is positioned to a desired position to enable the cutting. A motor of the cutting device is activated to rotate the cutting head about a central axis of the cylindrical component to cut the end surface of the cylindrical component. A profile of the end surface is created by the cutting of the end surface via the motor. Upon activation of the motor, the cutting device is guided along a circumferential direction against the end surface. A system for cutting a profile into a surface of a cylindrical component is also provided.

Abstract: A guide apparatus for guiding a woodworking router relative a workpiece, comprising: a base for engaging with a workpiece or worktable carrying the workpiece; a guide frame coupled to the base and having at least one guide defining a linear guide path; a router housing slidably engaged with the guide for movement along the guide path relative the guide frame in an engaging direction towards the base and a disengaging direction away from the base, the router housing being configured to receive a woodworking router so that, in use, a router bit of the router extends from the router housing towards the base; and an actuation mechanism having a pivotable handle for receiving an input force from an operator to move housing along the guide path. The actuation mechanism is configured so that an input force is required to raise the housing and the router received therein against gravity.

Abstract: A surgical tool and attachment system includes a surgical power tool including a housing and rotary powered driver. A power tool accessory unit includes a power tool accessory driver and an attachment member connected to the housing. A coupling interconnects the rotary powered driver and the power tool accessory unit.

Abstract: A gearbox for a rack (6) and pinion (4) linear transmission, said gearbox further including—a reduction gear train (1-4) having at least a first (1), a second (2), a third (3), and a fourth gear wheel (4), where the fourth gear wheel is the pinion (4) for rotary engagement with the rack (6); a rotary input shaft (7) operatively connected to the gear train (1-4) to effect a linear relative movement between the rack (6) and the pinion (4); and an intermediate shaft (8) on which the first (1) and the second (2) gear wheel are fixed; the third gear wheel (3) being fixed on the input shaft (7), the fourth gear wheel (4) being journalled to enable it to rotate freely on the input shaft (7) and constituting the pinion (4), and the first gear wheel (1) and the fourth gear wheel (4) being in constant meshing engagement with each other.

Abstract: A method and apparatus for angularly drilling during a tapping procedure into a pressurized multiple strings of coaxially situated tubulars for wells and/or platforms which have overturned wherein the tapping occurs underwater via a diver or remotely operated vehicle.

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 valve seat processing machine (1) configured to process a valve seat (118) in a valve device (101) including a valve body portion (110) which forms a flow passage of fluid and a valve drive portion (120) which drives a valve element (124) capable of tightly engaging with the valve seat (118) in the valve body portion (110) includes: a base portion (10) attached to the valve body portion (110); a main body portion (20) movable relative to the base portion (10) in two different axial directions; a support portion (30) movable relative to the main body portion (20) in a drive direction of the valve element (124); a main spindle (40) rotatable relative to the support portion (30) about an axis parallel to the drive direction of the valve element (124); and a tool holder (50) configured to hold a tool (T) for processing the valve seat (118).

Abstract: Method and apparatus for grading food items, such as shrimps and chicken parts, with an automatically calibrated imaging system. Singulated food items are individually imaged. An estimated weight for each food item is computed from its image and an image-to-weight function. Calibration weighers weigh the food item individually or in batches before or after imaging. The actual weights are compared to the estimated weights to fine-tune the image-to-weight function and improve weight estimation.

Abstract: A tool for inserting and fastening a replacement injector sleeve in the cylinder head of a diesel engine. The tool is part of an injector sleeve tool kit which also includes an injector sleeve removal tool. The installation tool includes an expandable mandril which is inserted into the injector sleeve and expands a portion of the sleeve causing a press fit of the sleeve within the cylinder head. The sleeve removal tool includes a tap having a longitudinal body and a threaded cutting head at one end and a bolt having a head at the other end. An extraction nut is threaded onto the threaded shaft of the drive member followed by a bearing surface member such as a spacer. A hollow cylinder or support sleeve having an internal diameter greater than the injector sleeve to be removed and an external diameter less than the diameter of the sleeve bore includes a shoulder member.

Abstract: A tool for removing an injector sleeve from the cylinder head of a diesel engine between the rocker arms while the head remains mounted to the engine block within the vehicle. The devices includes a tap having a longitudinal body and a threaded cutting head at one end. A drive member comprises a bolt having a head at one distal end. An extraction nut is threaded onto the threaded shaft of the drive member followed by a bearing surface member such as a spacer. A hollow cylinder or support sleeve having an internal diameter greater than the injector sleeve to be removed and an external diameter less than the diameter of the sleeve bore includes a shoulder member.

Abstract: A device (20) for root-rolling a thread (T) on an object (O) includes: a body (21), an accumulator piston (24) mounted for sealed sliding movement within a body passageway (22), a coarse adjustment screw (25) threaded onto the body, a Belleville spring stack (26) compressed between the coarse adjustment screw and the accumulator piston, an actuator piston (28A or 28B) mounted for sealed sliding movement within a cylindrical opening (23) in the body, and a thread roll (32) rotatably mounted on the actuator piston. A fine adjustment screw is threaded (33) into a first opening (34) on the body, and communicates with a fluid chamber between the accumulator and actuator pistons. The positions of the coarse and fine adjustment screws may be selectively adjusted to controllably vary the fluid pressure within the chamber. The device may be mounted on a machine tool (35) and selectively moved toward the object to root-roll a thread on the object when the object and device are rotated relative to one another.

Abstract: A handheld power drill apparatus includes a drill motor, a carriage motor, a drilling implement with an interchangeable locking chuck, an electronic controller, and guide plates. The guide plate is slidably mounted to accommodate different work piece thicknesses. The drilling implement is coaxially mounted on a lead screw mounting plate. The drilling implement is positioned substantially orthogonal to the workpiece. The drilling implement is automatically driven into a workpiece by the carriage motor.

Abstract: The present invention relates to methods and systems for automatically feeding a feeding housing (206) of a drilling device (200). The drilling device (200) includes a drill stand (202), a drilling machine (204) and a feeding housing (206). Further, the drilling machine (204), which is suspended by the feeding housing (206), includes a drill with a drilling motor for performing a drilling operation through a drilling object. The feeding unit (208) includes an electric feeding motor for feeding the feeding housing (206) along the stand (202). Further, the feeding unit (208) also includes a controller for manually influencing the feeding motor's direction of rotation, speed and feeding force.

Abstract: An aligning attachment includes a support aligned relative to a workpiece by a base and a collar slidably connected to the support. The aligning attachment is connected to a power tool and the power tool is guided toward the workpiece by the collar. The translation of the power tool is controlled by a control force applied to a lever pivotally connected to the collar. The lever cooperates with the support to transfer the control force to the support and the collar to counteract an input force applied to the power tool. The control force and associated reaction forces on the support and the lever lie approximately in the same plane. A user controls the translation of the power tool device by increasing or decreasing the control force applied to the lever.

Abstract: A reaming tool has a generally planar base with a base opening. A stand is coupled to the base and extends away from the base, the stand having at least one cross member. A guide opening extends through the cross member. An elongate reamer has a longitudinal axis, a first end and a second, opposing end. The reamer extends through the guide opening and the base opening, with the second end of the reamer being proximal to the base opening. A set of reaming flutes are formed in the reamer proximate its second end. The reamer is slidable and rotatable in the guide opening and the base opening, and the orientation of the longitudinal axis of the reamer with respect to the base and the stand is fixed by the guide opening.

Abstract: Described are various embodiments of a tapping apparatus and accessory for tapping a hole. The apparatus generally comprises a body defining a longitudinal cavity therein for longitudinal alignment with the hole. A tap assembly comprises opposed tapping and driving elements engaged within the cavity to rotate in longitudinal alignment therewith and to be longitudinally guided thereby in operation.

Abstract: A method of engaging a fastener may include attaching a guide assembly to a structure. The guide assembly may include a first arm, a second arm, and a head assembly mounted to an end of the first arm. The method may further include threadably engaging a tool sleeve to the head assembly, coupling a tool to the tool sleeve, and adjusting and clamping the angular orientation of the second arm relative to the first arm using a swivel mechanism. The method may additionally include engaging the tool to a fastener, rotating the tool sleeve relative to the head assembly, and applying a down force to the fastener in response to rotating the tool sleeve to move the tool axially relative to the head assembly.

Abstract: There is described a device for a remote controlled, submarine machining unit arranged for machining of a surface on an installation element by rotation and axial displacement of a tool head and also displacement of one or more cutter holders relative to the tool head, the machining unit being provided with means for releasable mounting of the machining unit at or on the installation element, wherein the tool head is fastened in a rotor shaft axially displaceably supported in a frame and axially rigidly supported in a primary adjustment works enclosing an end portion of the rotor shaft; and a secondary adjustment works is connected to the rotor shaft and comprises means arranged for transfer of a rotary movement of an adjustment handle projecting from the rotor shaft end portion, to a displacement of the cutter holders.

Abstract: Disclosed is a core drilling machine, comprising a stand part for fixing the core drilling machine to a component, and comprising, on the stand part, a guide along which a core drilling unit is carried in a movable manner, the stand part having a stand housing, on an outside face of which the guide is carried, and the core drilling unit having an elongate machine housing, which is carried so as to be movable along the guide by means of a slide, and comprising a cable, which, together with a protective sleeve, is routed from the stand part to the core drilling unit, the cable being routed from the stand housing to the core drilling unit via a flexible protective sleeve and being carried on the core drilling unit by means of a swivelling rotary joint.

Abstract: A pushing structure of a metal work drilling tool includes a drill housing, a drill assembly, a push part and a feed trigger. The drill assembly is constituted by a drill bit, an extension rod and a power device. When drilling needs to be conducted, the feed trigger is pressed to drive the drill assembly forward that the drill bit gently contacts with the object for drilling; next, the drilling tool is activated and the feed trigger is pushed, then drilling force can be controlled effectively to improve a drilling efficiency and reduce a chance that the drill bit is broken due to percussion.

Abstract: The invention relates to a drilling apparatus which is held firmly on the workpiece by means of feet, and which has a step-down transmission for easier manual feeding.

Abstract: A deep-hole boring machine (100) includes a base (11) to be fitted to an upper face of a floor, a pillar (14), a fixing mechanism (40), a guide member (15), a rotary tool (17), a tool rotation driving section (16), a rising/descending mechanism (50), a guide base (60) and a tool guide mechanism (30). The deep-hole boring machine 100 can be used to bore a vertical hole or an inclined hole in a concrete in a construction site.

Abstract: An apparatus and method for forming a hole in material for non-medical and medical purposes such as a cranial burr hole for ventriculostomy and brain biopsy procedures. The apparatus includes a main unit upon which a drill unit is located. The drill unit includes a drill bit and an on/off switching means. The main unit includes a handle which is suitable for grasping, and an advancing mechanism including a release/engage mechanism, and an advancing lever and an optional on/off switch. The drill unit is advanced a predetermined distance relative to the main unit each time an advancing lever is pulled. In use, the apparatus is placed in a desired position upon the material to be drilled such a patient's skull and is stabilized by a stabilization platform, the apparatus is then turned on, and the advancing lever is pulled to advance the drill unit a predetermined distance relative to a longitudinal axis of the main unit with each pull of the advancing lever.

Abstract: A rotary cutting machine 10, if inclined at large angles, provides positive supply of a cutting oil and avoids leakage of the cutting oil. The machine 10 has a machine body 14 and an arbor 18. An oil tank 50 is mountable to the machine body 14 so that the oil tank 50 is oriented at a given angular position about the central axis of the arbor 18. The tank body 54 has an interior space. The interior space is divided into a first interior part and a second interior part by an imaginary plane containing the central axis of rotation of the arbor. The first interior part is less in volume than the second interior part.

Abstract: An eyeglass lens processing apparatus includes; a drilling tool for forming a hole in an eyeglass lens; a first movement mechanism part that relatively moves the drilling tool relative to the lens; a target lens shape input section that inputs data of a two-dimensional target lens shape of the lens; a hole-position input section that inputs data of a position of a hole to be formed in a refractive surface of the lens, which is designated on a two-dimensional coordinate system of the input target lens shape; a measurement part that measures a shape of the refractive surface of the lens; a calculation section that corrects at least part of the input hole-position data into hole-position data along the measured refractive surface shape of the lens and determines hole processing data based on the corrected hole-position data; and a control section that controls the first movement mechanism part based on the determined hole-processing data.

Abstract: A drill assembly, for example for drilling or coring concrete, has a drill column formed from a composite material. A track for a wall saw or for supporting other structures for movement along the track is formed from a composite material. A composite column, rail or other longitudinally extending composite structure having a hollow interior portion includes an internal support structure.

Abstract: A machine tool includes a machine body, a first driving unit, a first sliding member driven by the first driving unit to move on the machine body along a direction, a second driving unit disposed on the first sliding member, and a second sliding member driven by the second driving unit to move on the first sliding member along the direction.

Abstract: Techniques of performing a manufacturing operation on a workpiece are disclosed. In one embodiment, a method includes forming an indexing hole in the workpiece. A coordinating pin may be installed into the indexing hole, the coordinating pin including a quantum of indexing information. A sensor may be positioned proximate the coordinating pin. The quantum of indexing information may be sensed with a sensor. A manufacturing operation may be performed on the workpiece based at least partially on the quantum of indexing information.

Abstract: A drill assembly, for example for drilling or coring concrete, has a drill column formed from a composite material. A track for a wall saw or for supporting other structures for movement along the track is formed from a composite material. A composite column, rail or other longitudinally extending composite structure having a hollow interior portion includes an internal support structure.

Abstract: A drill stand for a core drilling machine (1) for driving an annular core bit (2) rotatable about a rotational axis (A) has a base plate formed of a post plate (3) and a vacuum plate (6) securable with each other with a possibility of displacement relative to each other in a plane (E) separating the post and vacuum plates (3,6), at least one post (5), an attachment element (4) for securing the post (5) on the post plate (3); and a vacuum planar attachment element (7) for mounting the base plate on a surface.

Abstract: A jewelry setting/presetting tool for drilling countersink basins in jewelry and setting stones therein. The jewelry setting/presetting tool includes a bracket assembly including a board-like mounting bracket having an opening being disposed therethrough from a topside to a bottom side thereof; and also includes a tubular base member being secured in the opening of the board-like mounting bracket and having an open bottom end and an open top end; and further includes a work-piece support member being adjustably fastened in the tubular base member through the open bottom end thereof; also includes a tool support member being movably disposed in the tubular base member; and further includes a working tool assembly being securely and removably fastened to the tool support member; and also includes a means of moving the tool support member and the working tool assembly in the tubular base member.

Abstract: A T-bracket having a pair of spaced apart arms support a housing containing a sprocket wheel and a shaft to turn the sprocket. A handle attached to one end of the shaft turns the sprocket to tighten a chain turning on the sprocket teeth. A flexible wire rod is welded to the T-bracket and is juxtaposed around a rear end of a power drill. The chain is looped around a work piece and attached to a side of the drill opposite from the T-bracket. The handle is turned to tighten the chain and exert force on a drill bit being driven by the power drill.

Abstract: A method of drilling and a drill motor are provided for use with a stationary template attached to a material to be drilled. The drill motor has a frame having a handgrip and surrounding a movable carriage or motor assembly. The motor assembly contains an air-powered motor for rotating a drill bit. At least two air cylinders are located in the motor assembly on opposite sides of the drilling axis and are used to move the motor assembly within the frame. The force that can be applied to move the motor assembly is adjusted by adjusting the airflow to the cylinders. Hydraulic restrictions control the maximum speed at which the motor assembly moves. An auto-return valve and adjustable pin provide means for automatically returning the motor assembly to its rearward position once a desired drilling depth has been reached. Controls are provided at the grip for operating the feed system and manually retracting the motor assembly.

Abstract: The portable drill press has a rack bar with a brace attached at one end. A pinion slide assembly is slidably engaged with the rack bar such that the pinion is in rotational engagement with a rack. The pinion slide assembly may be retained on the rack bar by a bolt. The pinion may be attached to a pinion shaft that may be rotated by a rotation lever. A mounting bracket may be attached to the pinion slide assembly for attachment of a hand drill. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: A chuck for holding a small bit and used with a table drill is provided for drilling a millipore. The chuck includes a holding jaw having four holders; a jaw-positioning guiding body with a square hole at the front portion for positioning the holding jaw; a crossing linkage for connecting the body to the jaw and having a crossing head and a projection portion between which a groove is formed; a guiding jacket matched with the crossing linkage and the body; a positioning screw nut matched with the jaw-position guiding body; a screw collar matched with the crossing linkage; and a bevel gear housing housed around the screw collar for adjusting the position of the holding jaw.

Abstract: The portable drill press has a rack bar with a brace attached at one end. A pinion slide assembly is slidably engaged with the rack bar such that the pinion is in rotational engagement with a rack. The pinion slide assembly may be retained on the rack bar by a bolt. The pinion may be attached to a pinion shaft that may be rotated by a rotation lever. A mounting bracket may be attached to the pinion slide assembly for attachment of a hand drill. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: A method of drilling and a drill motor are provided for use with a stationary template attached to a material to be drilled. The drill motor has a frame having a handgrip and surrounding a movable carriage or motor assembly. The motor assembly contains an air-powered motor for rotating a drill bit. At least two air cylinders are located in the motor assembly on opposite sides of the drilling axis and are used to move the motor assembly within the frame. The force that can be applied to move the motor assembly is adjusted by adjusting the airflow to the cylinders. Hydraulic restrictions control the maximum speed at which the motor assembly moves. An auto-return valve and adjustable pin provide means for automatically returning the motor assembly to its rearward position once a desired drilling depth has been reached. Controls are provided at the grip for operating the feed system and manually retracting the motor assembly.

Abstract: A method of drilling and a drill motor are provided for use with a stationary template attached to a material to be drilled. The drill motor has a frame having a handgrip and surrounding a movable carriage or motor assembly. The motor assembly contains an air-powered motor for rotating a drill bit. At least two air cylinders are located in the motor assembly on opposite sides of the drilling axis and are used to move the motor assembly within the frame. The force that can be applied to move the motor assembly is adjusted by adjusting the airflow to the cylinders. Hydraulic restrictions control the maximum speed at which the motor assembly moves. An auto-return valve and adjustable pin provide means for automatically returning the motor assembly to its rearward position once a desired drilling depth has been reached. Controls are provided at the grip for operating the feed system and manually retracting the motor assembly.

Abstract: A drilling device for frameless glasses with a drill head (34), which can be moved up and down. The drill head (34) can be inclined to either side and a holding device (50, 56, 58) is provided for the two lenses of a pair of glasses, in which holding device (50, 56, 58) the opposite edge regions of the lenses are accessible to the drill bit of the dual head (34).

Abstract: A portable machine tool for removing stub ends of heat exchange tubes from a heat exchanger header or other plate structure and preparing the tube opening in the header for butt-welding a new tube at the opening. The tool includes a mandrel that may be locked within the tube opening and a plurality of stabilizing legs extending between the mandrel and the header for stabilizing the mandrel during machine tool operation. A cutting head is mounted concentrically on the mandrel and is advanced into engagement with the stub end of a heat exchange tube and it's respective opening to remove the stub end and prepare the opening for welding the new tube thereon.

Abstract: A column positioning device for a drill press includes a base having a post and a positioning pin respectively extending from a top of the base. The post is received in a hollow column on which a motor is connected. The column has two positioning passages so that the positioning pin is engaged one of the positioning passages. A frame is connected a side of the column and a pusher is connected to the frame. A rod extends from the pusher and a pressing member is movably mounted to the rod. When rotating the column 180 degrees about the post, the column is conveniently positioned by inserting the pin with the other positioning passage.

Abstract: A chuck for holding a small bit and used with a table drill is provided for drilling a millipore. The chuck includes a holding jaw having four holders; a jaw-positioning guiding body with a square hole at the front portion for positioning the holding jaw; a crossing linkage for connecting the body to the jaw and having a crossing head and a project between which a groove is formed; a guiding jacket matched with the crossing linkage and the body; a positioning screw nut matched with the jaw-position guiding body; a screw collar matched with the crossing linkage; and a bevel gear housing housed around the screw collar for fixing it.

Abstract: An automatic boring device is provided that comprises a tool housing having attached to it two opposing handles with switches mounted thereon for selective engagement of pneumatic controls that activate a clamping device, rotation of a chuck of a pneumatic drill, and downward movement of the drill. The pneumatic drill is removable and the depth of the downward boring stroke is adjustable.

Abstract: This invention is a portable pneumatic cutter tool for cutting countersinks into a workpiece 17 having pre-drilled holes 15. When pressure is applied, a piston return cylinder 57 and a feed rate cylinder 79 are also pressurized, which sets a body piston 72 and spindle piston 80 reacts against a spindle bar 82 which holds nose 94 in its outer-most limit position. A pistol grip drill 44 drives a geared belt 34 to cut the countersink after actuation by trigger 45. A flare tube shaft 14 expands a multiple finger and pad arrangement of a collet 12 to provide clamp-up on the back side of workpiece 17. Clamp-up on the front side of workpiece 17 is provided by pneumnatic pressure and solid mechanical stops 16. The countersink cutter 18 advances into workpiece 17, reaching its depth, and returns automatically to its start position.

Abstract: Disclosed is a device for use in machining an interior surface of a tubular object which comprises a pair of rails that can be longitudinally instad through the interior section of the tubular object. Braces join the rail for fixing the rails to the tubular object. A platform is movably mounted on the rails to allow longitudinal movement of the platform. A machine tool can be mounted on the platform.

Abstract: A drill rig for drilling access holes in drill resistant materials, such as those used to construct safes or other secure containers. The drill rig includes a drill bit holding and advancing mechanism having enclosed threaded members for allowing incremental, even pressure to be applied during a drilling operation while preventing burrs and chips from becoming lodged within the threads. A sliding connection is provided between stationary frame structure of the rig and the drill bit holding and advancing mechanism. The connection includes a spring loaded, quick-release mechanism for allowing quick detachment of the drill bit holding and advancing mechanism from the frame structure at the end of a drilling operation or as needed to replace the drill bit.

Abstract: A hand held drill press (20) is shown for a drill motor (30) having a clamping collar (44) and a drill bit (26). The drill motor is mounted in a movable jaw (56) which is moved along a slide bar (52) toward a fixed jaw (54) by squeezing a trigger (58) against a handle (100) of the movable jaw. A work piece (24) placed between the fixed jaw and the drill bit is drilled as the trigger is squeezed.

Abstract: A new water supply line tapping tool for allowing plumbers to tap into a main water supply line. The inventive device includes a main shaft having a first end and a second end. The first end is adapted for coupling with a standard portable electric drill. The main shaft has a threaded hole therein disposed inwardly of the second end. The threaded hole receives a screw therein. The second end has an internally threaded receiving collar disposed thereon. A hole saw is coupled with the receiving collar on the second end of the main shaft. The hole saw has an arbor portion. The arbor portion has an internal end extending inwardly of the second end of the main shaft for being engaged by the screw extending within the threaded hole. A sleeve is slidably disposed on the main shaft for coupling with a saddle valve.

Abstract: An apparatus for piercing a hole in a tube centered on a tube axis has a plurality of housing parts one which is formed with a throughgoing threaded passage centered on a passage axis and both of which are secured the housing parts around the tube with the passage axis extending generally radially of the tube axis. A tool body threadable into the passage is formed with a blind bore generally centered on the passage axis, open radially inward of the tube axis toward the tube, and having an end wall directed radially inward of the tube axis toward the tube. A straight hard metal needle in the bore has a pointed inner end directed radially inward of the tube axis at the tube and an opposite outer end confronting the end wall of the bore. The outer needle end is centered by appropriate formations in the bore on the passage axis and the outer needle end is braced radially outward of the tube axis against the bore end wall.