Abstract: An arbor for mounting a tool such as a drill or a grindstone to the end of a spindle of a machine tool and a machining method of employing such arbor. The arbor comprises a lubricant receiving member provided in the main body for receiving a lubricant supplied, and a lubricant passageway provided in the main body and extending between the lubricant receiving member and the tool mounting portion for flowing the lubricant from the lubricant receiving member to the tool mounting portion so as to supply the lubricant into an interior of the tool. The lubricant supplied from the spindle or another source of supply is allowed to flow through the lubricant receiving member and the lubricant passageway, and is supplied into an interior of the tool to ensure the appropriate supply of the lubricant to the area in which the tool acts upon the workpiece.

Abstract: An apparatus for boring a laminated plate includes a table having a first surface on which a laminated plate may be placed for boring and an opposing second surface, the table defining at least one passage therethrough; a supporting pad for urging a laminated plate to be bored towards the first surface of the table; and a cutter for boring a laminated plate to be bored, the cutter operable to bore in a direction generally opposite to the direction that the supporting pad urges and through the passage defined by the table. Further according to the present invention, the cutter includes a knife edge, a pivotal mechanism adapted to be pivoted about its axial center line, and a stepping mechanism for moving the knife edge in one direction and unsuccessively further in a second direction so that successively deeper boring may be performed.

Abstract: A collar adapted to be engaged about a rotating cutting tool for continuously transporting a cutting fluid from a stationary source to the cutting tool including outer and inner rings in sealed relationship forming a cutting fluid channel and at least one low friction material containing channel and a pair of tenon keys positioned in curvilinear grooves on the surface of the inner ring to provide a sealed passageway for the flow of the cutting fluid from the collar to the cutting tool, and cutting tools employing the same.

Abstract: The present invention relates to a drill head having removable spindles. The spindles include a shaft adapted for receiving and rotating a drill. The shaft is also removably rotatable with the drilling unit. A mechanism for providing a coolant to the workpiece is coupled with the spindle.

Abstract: A coupling between a tool head and a tool support exhibits, for rough positioning, a holding fixture pin connection. By at least one fastening bolt running in the axial direction of the tool support, the tool head is braced against the tool support. In doing so the fastening bolt engages through a first screw coupling with the tool head and through a second screw coupling with the tool support. The first and second screw couplings exhibit synchronized threads of differing pitch so that, when tightening the fastening bolt, the tool support and the tool head are braced against each other in the axial direction. Further, the fastening bolt exhibits a centering section which, in the assembled state of the coupling, centers the tool head relative to the tool support. The fastening bolt, in the assembled state of the coupling, is received in its entirety in the inside of the unit formed by the tool support and the tool head and is accessible only through a borehole.

Abstract: A drill comprising a drill shank having a taper portion adjacent to a threaded portion provided on the rear or basal portion of the shank. When the drill is screwed into an axial hole in a drill holder of a drilling machine, the opening edge or inner tapered wall of the axial hole of the drill holder bites into the taper portion of the drill shank, consequently to bring the drill into firm connection with the drill holder of the drilling machine.

Abstract: Method and apparatus for conducting boring of a series of spaced walls on a workpiece using a self-adjusting boring bar.

Abstract: A one-piece rotary drill or end milling cutter is an extruded product made of sintered hard metal. The front end portion of its shank has one or more cutting edges and its rear end portion tapers in a direction away from the front end portion and is receivable with friction in a complementary conical socket of a rotary holder. The shank has one or more longitudinally extending coolant holes with a circular or triangular cross-sectional outline, and such hole or holes are formed in the course of the extruding step. The periperhal surface of the shank has one or more longitudinally extending chip evacuating grooves, and those portions of the grooves which are formed in the rear end portion of the shank contain fillers of bondable plastic material or solder.

Abstract: A holder for a cutting tool has a main spindle formed with a bore to receive the cutting tool, a casing mounted on the main spindle, and an oil receiver stand secured to the casing. The main spindle, casing and receiver stand are each formed with an oil passage communicating with one another to feed cutting fluid to the cutting tool. The holder is characterized in that an intensifier for increasing the feed pressure of the cutting fluid is provided in an annular chamber provided around the main spindle in the oil passage to the cutting tool.

Abstract: A single-lip solid drilling tool has a one-piece shank with an integral head having a radially or diametrically extending groove for a blade with an eccentric tip. The blade is held in its groove by several clamping screws so that it can be removed for sharpening or for replacement with a fresh blade. One or both lateral portions of the blade extend beyond the periphery of the head to guide the tool in actual use. The shank has an eccentric coolant hole whose discharge end is adjacent the blade and which is formed by providing a short cylindrical hard-metal blank with an eccentric axially parallel bore before the blank is stretched to reduce its diameter to a requisite value and to simultaneously reduce the diameter of the bore. The stretched blank is then machined to provide it with one or more chip evacuating flutes and, if necessary, with one or more grooves for discrete guide members which extend beyond the peripheral surface of the head.

Abstract: A drilling tool which has at least one helical fluid flow channel at its interior, is composed of a hard metal core having an exterior surface and a hard metal tubular casing having an interior surface. The casing encloses the core with their surfaces in firm contact so that the core and casing form a composite body. Each channel is formed as a groove in the surface of the core or casing.

Abstract: A drill bit for use in a drill string comprising a set of a plurality of central rod members and a set of a plurality of tubular members surrounding said rod members. The drill bit is provided with a longitudinally extending flushing channel which communicates with an annular space between the rod members and the tubular members via a transverse passage. The flushing channel comprises at least two end passages terminating in the bit front. The cross section area of each of the end passages is smaller than the overall cross section area of the portion of the flushing channel located between the end passages and the transverse passage.

Abstract: As an alternative to the drilling of relatively long holes through a mass of material to provide a passage for fluid coolant the invention makes use of a laterally open elongated slot cut into the mass of material into which easily worked material is embedded to form the fluid passage. One alternative is to lay a preformed length of tube in the slot and secure the tube in place with an appropriate bedding mass. Another is to make use of a molding expedient, namely, packing the passage with a moldable material in which an elongated core is embedded and then removing the core to form the fluid passage.

Abstract: A unit for mounting a cutting tool on a machine tool. The casing is divided into two portions, one with a joint for connection with the spindle of a machine tool and the other with a chuck unit for mounting a cutting tool. The shank itself is also divided into two portions. Even so, cutting oil is supplied through the unit case and injected toward the cutting tool at any cutting angle.

Abstract: A chuck for a cylindrical rotary metal cutting tool, such as an end mill, is provided with a liquid coolant system. The chuck is constructed to direct cooling liquid onto a cutting tool secured in an axial bore defined therein with a plurality of converging liquid streams directed at the tool. The chuck is constructed with alternative passageways. Liquid coolant may be directed along a central, axial cooling liquid passageway remote from a transverse end face of the chuck. Liquid may pass radially outwardly therefrom through radial bores and into intersecting longitudinal cooling liquid distribution ducts which are inclined toward the axis of the tool holder and which terminate in outlet ports in the end face. The radial bores are plugged at locations radially outwardly from the intersection of the ducts with the radial bores.

Abstract: For correcting axial errors of a tool, the latter is held by a two-part tool holder, whose two parts are reciprocally displaceable by a setscrew along their engaging interfaces at right angles to the axis. For this purpose, the locking screws of a flange connection are correspondingly loosened. The axial correction can be simply and rapidly performed, in that the setscrew is provided on a setting ring rotatable about the axis.

Abstract: A rotatable coolant supply shank, and cutting tool incorporating such shank, provided with a coolant inlet, for alignment with a ring bore, extending inwardly from the peripheral surface of the shank for positively pulling coolant towards the shank axis when the shank is coupled to the cutting tool and rotated while coolant is being supplied to the inlet from the ring bore.

Abstract: A tap for forming threads on the inside of a bore which includes a hexagonal central pilot bore and transverse dihedral shafts constituting means for extracting a tap broken within a bore and also constituting means for depositing lubrication or coolant or introducing pressurized air to the cutting dies of the tap. Slots are formed in the distal end of the tap to allow a flat bladed instrument to be inserted for removal of a broken tap part.

Abstract: Quick change chuck systems with integral fluid inducer. A quick change drill bushing system reduces misalignment of bushing to motor spindles and enables rapid change of cutting tools and bushing thereby reducing the number of dedicated working systems. The quick change chuck system with integral fluid inducer may utilize a quick change nosepiece system in combination.

Abstract: Quick change chuck systems with integral fluid inducer. A quick change drill bushing system reduces misalignment of bushing to motor spindles and enables rapid change of cutting tools and bushing thereby reducing the number of dedicated working systems. The quick change chuck system with integral fluid inducer may utilize a quick change nosepiece system in combination.

Abstract: The invention provides a holding device for a reamer tool in a machine tool, which comprises a tool holder adapted to be secured to the machine tool for rotation about a longitudinal axis, a tool receiving bushing radially displaceably guided in the tool holder, and a coupling providing a non-rotational connection between the tool holder and the tool receiving bushing. The coupling comprises a coupling disc having two radial end faces, a first one of the coupling disc end faces cooperating with a radical end face of the tool holder, a second one of the coupling disc end faces cooperating with a radial end face of the tool receiving bushing, at least a part of the coupling disc end faces and of the tool holder and tool receiving bushing end faces being configurated as planar gliding surfaces, and pairs of the gliding surfaces facing and contacting each other for transmitting axial pushing forces to the reamer tool.

Abstract: A drill bit structure has a drill bit body 4 and a plate-like hard tip member 9. The cutting end of the drill bit body 4 has a groove 7 extending substantially at right angles to the central drill bit axis, and the hard tip 9 is fitted and fixed in the groove 7. The web thickness is 25-35% of the drill bit diameter and the flute width ratio is 0.4:1 to 0.8:1. The rake angle of each cutting lip 10 measured at positions spaced at least 2/3 of the drill bit diameter radially outward from the drill bit center is in the range of -5.degree. to positive values.

Abstract: A tapper for loading a spindle of machine tools with a tap. The tapper proper has a shaft to be driven, which is supported under floating axially by means of a pair of springs the pressurizing direction of which are opposite to each other, built-in. Cutting oil is pressurized to be fed from the outside of the tapper proper through oil passages, respectively which are provided on the tapper proper and the shaft to be driven to a oil hole and, in that case, the oil passages are formed such that the resultant hydraulic pressure does not give rise to an action of breaking the floating state of the shaft to be driven.

Abstract: A coolant and lubricant is supplied to the cutter head through the shank of a reamer. For this purpose an axial channel extends through the reamer shank and encloses in its front part a conical screw used for adjusting the cutter head and whose threaded shank has at least one longitudinal slot, so that the coolant and lubricant passes through the threaded shank into a ring channel in the front region of the reamer. The coolant and lubricant flows from said ring channel via outlet channels between the cutters. The outlet channels slope outwards in the direction of the leading edge of the cutters, so that an optimum cooling and lubrication of the latter is obtained.

Abstract: A drill is described having a metal bit carrier part on which a sintered metal bit is placed. The bit possesses at least one enclosed helical cooling channel which continues in alignment into a corresponding cooling channel in the bit carrier part. This drill is particularly characterized by very great mechanical and thermal stability, which is not adversely affected in any way by the system of cooling channels in the interior of the drill, so that the service life and cutting power of the drill can be greatly increased. These advantages apply both to twist drills proper and to single-lipped deep-hole drills, for which there is the particular advantage that the geometry of the drill head can be optimally adapted to the particular material to be processed.

Abstract: A line boring machine adapted for high speed line boring of engine blocks or the like featuring a series of spaced crankcase bulkheads, employes a motorized spindle capable of advancing, and boring bar from one end of the block therethrough to the other end to penetrate a remote cutting end of the bar serially through the bulkheads.

Abstract: A workpiece cutting apparatus including a spindle-supporting assembly, a rotatable spindle mounted within the assembly and a cutting tool supported by the spindle utilizes a network of passages defined in the spindle-supporting assembly, the spindle and cutting tool for effectively introducing a lubricating and/or cooling fluid into the region of a workpiece being cut by the cutting edge of the cutting tool. The spindle-supporting assembly includes a collar having an opening through which a portion of the spindle is rotatably received, and the surface of the opening defines an annular groove encircling the spindle into which fluid is directed. The surfaces of the groove and spindle define an annular cavity, and the spindle defines a passageway defining an opening which is in constant communication with the annular cavity. The cutting tool defines a conduit having an entrance in flow communication with the spindle passageway and an exit positioned adjacent the cutting edge of the cutting tool.

Abstract: The invention relates to a drill for metal drilling, comprising a drill body and a drill tip provided with cutting portions. The drill tip is detachably secured to the drill body by means of fastening devices, which are arranged on opposite sides of the centerline (CL) of the drill. The planar lower face of the drill tip is provided with a central tap which engages in a central recess in the mainly planar front surface of the drill body in order to center the drill tip relative to the drill body. A central fluid passage is formed in the drill body, which transforms into eccentrically arranged fluid passages in the drill tip. The fastening devices form at least partly walls in the eccentrical fluid passages.

Abstract: A conical cutting insert. The insert is comprised of a body member with first and second end sections oppositely disposed from a median plane. One or both of the end sections may be provided with a cutting edge. The cutting edge is formed by the intersection of an interior outwardly tapered cutting surface and an exterior inwardly tapered flank surface. The cutting surface may be frustro-conical or one or more planar surfaces. The flank surface may be frustro-conical or one or more planar surfaces. Where planar surfaces are utilized, the cutting edges are linear. Where frustro-conical surfaces are utilized, the cutting edge is circular. A plurality of coolant flow orifices are provided to allow the flow of coolant on one or both of the flank surface and cutting surface. Chip flow grooves may be provided on the cutting surface to guide and/or break chips during the cutting operation. Lobes may be provided on the flank surface to provide a constant flank angle during the cutting operation.

Abstract: A chuck for a cylindrical, rotary, metal cutting tool, such as an end mill, is provided with a liquid coolant system. The chuck has a stationary, annular collar within which a tool holder rotates at high speed. An annular channel is defined between the collar and the tool holder and liquid coolant is pumped into the collar to the channel through an inlet on the collar. Internal ducts within the tool holder are directed inwardly at an angle from the annular channel toward an end face from which a rotary tool, such as an end mill protrudes. The ducts are also oriented at an angle corresponding to the helical spiral of flutes on the end mill and are radially aligned with troughs between the flutes. Liquid coolant, such as water, is forced from the annular channel through the ducts toward the troughs between the flutes. The liquid coolant travels all the way to the tip of the end mill to cool the bit and wash chips of metal therefrom with a minimum of water being thrown from the end mill by centrifugal force.

Abstract: A coolant supply apparatus, and cutting tool incorporating such apparatus, wherein during a cutting operation coolant is supplied from a coolant supply means through a coolant supply member which is spaced from a tool shank mounted supply ring. A valve is included for preventing leakage at the space between the coolant supply means and the supply ring when the coolant is being supplied.

Abstract: A drill bit, particularly for cutting deep holes in hard materials, includes a tubular shank with a solid center and diametrically opposed coolant conduits which supply coolant to a tungsten carbide tip located on one end of the tubular shank. Swarf and debris are carried by the coolant away from the cutting area and along swarf clearance channels located along the exterior of the shank tube out of the borehole. The carbide tip is brazed to the tubular shank and is formed with a pair of angularly spaced tubular chambers which communicate with the coolant conduits in the shank. One cutting edge is provided on top of each chamber in the tip. A coolant hole is formed at the top of each tubular chamber, behind the cutting edge. The coolant which emerges from the tip flows to the space between the tubular chambers and carries with it the swarf along the swarf clearance channels defined by the shank out of the borehole.

Abstract: A holder for a cutting tool has a main spindle formed with a bore to receive the cutting tool, a casing mounted on the main spindle, and an oil receiver stand secured to the casing. The main spindle, casing and receiver stand are each formed with an oil passage communicating with one another to feed cutting fluid to the cutting tool. The holder is characterized in that an intersifier for increasing the feed pressure of the cutting fluid is provided in an annular chamber provided around the main spindle in the oil passage to the cutting tool.

Abstract: A coolant inducer pipe has one end thereof communicating with a source of coolant and is fixedly supported to place the opposite open end thereof adjacent to and beneath a machine tool spindle. The coolant inducer pipe is engageable with a coolant inducer ring on a metal cutting tool simultaneously with engagement of the cutting tool shank within the machine tool spindle.

Abstract: A tool support, or an extension or reduction part holding a tool support, is held by its shank in an axial bore of a socket of the tool-holding device. The socket has one or more further bores, the longitudinal axes of which each form an angle of from 0.degree. to about 5.degree. with a straight line perpendicular to the longitudinal axis of the socket. A setscrew disposed in one such further bore cooperates by means of a beveled or faceted surface at its lower end with a chucking surface running on the outside of the shank at an angle to the longitudinal axis thereof. Another setscrew may cooperate with a second such chucking surface forming an angle of about 45.degree. with the first chucking surface.

Abstract: A quick-change system for power feed and positive feed drill motors having quick-change capabilities whereby a nosepiece may be separated from the drill motor employing a quick-release coupling that does not utilize threaded means. The quick-change system utilizes a quick-change nosepiece, chuck and shank adapter means such that the oil line to a fluid inducer remains attached during nosepiece removal.

Abstract: This spade drill has an elongated holder with a standard driving configuration at one end, and adapted at the axially opposite end to receive a carrier block provided with receptacles for receiving indexable standard cutting inserts of extremely hard alloy.

Abstract: A tap extension having a dual-mode coolant delivery system is disclosed which is adapted to connect a thread-cutting tap with an associated machine tool spindle having a pressurized coolant supply. The extension includes a generally elongated shank portion, with a locking arrangement provided at one end thereof for receiving and releasably retaining a tap in driven relation with the tap extension. Notably, the tap extension includes a valve arrangement whereby pressurized coolant is directed: (1) through the axial bore of a tap in a first mode of operation, or (2) exteriorly of a solid tap to between its cutting flutes in a second mode of operation. Versatile and efficient thread-forming in either blind holes or through holes is thus facilitated by use of the present construction.

Abstract: A rotatable cylindrical extension member, and cutting tool incorporating such extension member, provided with a coolant inlet, for alignment with a ring bore, extending inwardly from the peripheral surface of the extension member for directing coolant towards the axis of the extension member when it is coupled to the cutting tool and rotated while coolant is being supplied to the inlet from the ring bore.

Abstract: A conical cutting insert. The insert is comprised of a body member with first and second end sections oppositely disposed from a median plane. One or both of the end sections may be provided with a cutting edge. The cutting edge is formed by the intersection of an interior outwardly tapered cutting surface and an exterior inwardly tapered flank surface. The cutting surface may be frustro-conical or one or more planar surfaces. The flank surface may be frustro-conical or one or more planar surfaces. Where planar surfaces are utilized, the cutting edges are linear. Where frustro-conical surfaces are utilized, the cutting edge is circular. A plurality of coolant flow orifices are provided to allow the flow of coolant on one or both of the flank surface and cutting surface. Chip flow grooves may be provided on the cutting surface to guide and/or break chips during the cutting operation. Lobes may be provided on the flank surface to provide a constant flank angle during the cutting operation.

Abstract: A device for boring holes has a geometrical longitudinal axis, a clamping zone, a shank having a front end zone, two turnover plates fastened on the front end zone of the shank in opposite positions, and a chip space in front of each turnover plate. In the shank, a longitudinal slot runs radially to the geometrical longitudinal axis, which is open towards the front end zone and has a bottom that extends so far towards the clamping zone that the shank halves thus formed can be bent forward at the front end zone to a degree that is sufficient for fine setting the bore diameter. Beyond the bottom of the longitudinal slot, a tapped hole in the shank is coaxial with the longitudinal axis. A coaxial rest hole in the shank in the inner zone of the longitudinal slot is intersected by the longiudinal slot.

Abstract: A tool holder assembly which comprises a tool holder adapted to be connected with a machine spindle for rotation together therewith, a stationary support member for rotatably supporting the tool holder and adapted to be connected to a fixed portion of the machine, a fluid supply circuit defined in the tool holder for the supply of a cutting fluid from an external source thereof towards a fluid discharge passage defined in a machine tool replaceably carried by the tool holder, and a vane-type displacement pump for forcibly pumping the cutting fluid from the fluid supply circuit to the fluid discharge passage in the machine tool for pouring the cutting fluid onto the workpiece being machined by the cutting tool. The displacement pump has its rotor constituted by a portion of the tool holder, and a pump casing constituted by a portion of the stationary support member.

Abstract: A deep-drilling tool, embodied by a tube provided with an internal passage and on the end of which a drill head is attached, the tube being divided into two tube sections, the rear one of which in the drilling direction has a diameter larger than that of the drill head. The entire drilling tool can accordingly be removed together with the drill head through a bearing or lubricating-oil supply device for replacement without disassembling the tool.

Abstract: A drill made of cemented carbide, is constructed for compensating for the brittleness of cemented carbide to increase its cross-break strength. For this purpose, the ratio of the diameter c of the web portion (1) to the drill diameter d is set in the range of 25% to 35%, and the flute width ratio (b:a) is set in the range of 0.4:1 to 0.8:1. Further, to decrease the cutting resistance on the drill, the radial rake .theta..sub.r angle of the cutting lip 4 measured at positions spaced at least 2/3 of the drill diameter toward the outer peripheral side is set in the range of -5.degree. to positive valves. Furthermore, to promote the chip ejecting function, the relative distance L between the cutting lip 4 and the flute wall 5 opposed thereto, is decreased.

Abstract: A tool changer for a deep hole drilling tool which has an internal passage for supplying or removing lubricating oil is described. The deep hole drilling tool is received such that it is adjustable in length in a tool receptacle, which on its receiving part has a groove which is engaged by clamping elements. These elements are provided in pivotable fashion in a tool adapter to which the receiving part belongs. They are held in the clamping position by spring-loaded parts and can by unlocked via a shifting sleeve counter to the force of the springs.

Abstract: A boring bar assembly comprises a shank portion and a detachable head portion supported thereon for rotary movement. The head portion may carry one or more removable cutting tool inserts for machining. The head portion is pinned in a fixed position on the shank portion by a shear pin. Excessive pressure in machining causes the pin to shear and allows the head portion to rotate on the shank portion and move away from the surface being machined, thus reducing tool breakage and damage to the parts being machined. An axially offset fluid passageway extends longitudinally through both the shank and head portions to direct liquid coolant onto the cutting tool surface. The axial offset of the passageway does not weaken the boring bar in flexure as much as an axial passageway.

Abstract: The invention relates to a device for transferring fluid to a rotating holder (11) for a tool (12) for chipforming machining. A locking means (28) is adapted to non-rotatably connect the holder (11) to a housing (20) when the holder (11) is removed from the machine tool, said housing being arranged on the holder (11) and carrying said locking means. For purposes of decreasing the risk that the housing (20) becomes nonuniformly loaded when the holder (11) is connected to the machine tool a locking means (28) is provided which is adapted to release the holder (11) from the housing (20) upon an application of a radially acting force on the locking means (28).

Abstract: A distributor body is idly mounted on the toolholder through rolling bearing means and a connector for feeding coolant even during the rotation; an off-center piston member on the distributor body and with a passage for the coolant is able to match the coolant plug on the machine nose; the piston can slide to engage and respectively disengage the toolholder and the distributor body upon the drawing out and respectively the fitting of the group from and into the machine spindle.

Abstract: Disclosed is a core drill assembly and method of using the same to drill a countersunk hole through a concrete slab, wall or the like masonary member. The assembly utilizes concentric inner and outer core drills, the longer smaller one of which is provided with flushing fluid outlets rearwardly of the front end of the outer or countersink drill and provided with closure means for confining fluid flow to the inner drill when that drill is in use, and for diverting the flow to the outer drill while performing the countersink operation. The two drills have separate coupling facilities thereby permitting the substitution of drills of any selected relative sizes.

Abstract: A reboring tool has a two-piece carrier for a separable cutter with several cutting edges. The front shank of the carrier is threadedly connected with the rear shank which has one axial passage for admission of coolant to the range of the cutting edges. The cutter is rotatable and axially movable in rear guiding sleeve in the retracted position of the tool. The front shank of the carrier is rotatable in a front guiding sleeve, and the workpiece is placed between the two sleeves so that the front shank extends through its bore prior to start of the bore enlargement operation. The distance between the cutter and the front end of the front shank of the carrier exceeds the length of the bore in the workpiece.