Abstract: In various embodiments, provided are ion optical assemblies, and systems for mounting and aligning ion optic components. In various embodiments, the present teachings provide ion optical assemblies with features that facilitate the alignment of ion optical elements. In various embodiments, the alignment of the ion optical elements by compressing them with securing members, as described in the present teachings, can simplify the alignment and assembly of ion optical elements. In the present teachings, no torque pattern is required to compress and align the ion optical elements. In various embodiments, the present teachings provide systems for mounting and aligning ion optic components that facilitate their alignment.

Abstract: A workpiece positioner includes a workpiece holder that is mounted to a chassis for rotation about a central axis, and further includes a first set of workpiece supports for retaining and supporting a first workpiece between a drive end and an idler end, and a second set of workpiece supports for retaining and supporting a second workpiece between the drive end and the idler end. The workpiece positioner also includes a support member that links the drive end to the idler end. This support member has a cross-sectional shape that is best characterized as an I-beam, and as such, the work envelopes for the first and second working pieces are very close together, but at the same time, still separated such that welding or other similar manufacturing and/or processing operations can be performed on each workpiece without any interference or effect on the other workpiece.

Abstract: An apparatus and method for machining of thin panels, in particular, panels having a complex shape, specifically non-deformable panels, in which the panel to be machined is placed beforehand in an isostatic position, characterized by: one defines one or more areas of a predetermined extent for purposes of machining, named machining windows, in the area of the panel to be machined; and perpendicular to each machining window; one of surfaces of panel is held in position without introducing positioning hyperstatism; the actual shape of the aforementioned surface is measured; the desired machining operation is performed on the opposite surface by taking the aforementioned measured surface as a reference; and the aforementioned surface is released.

Abstract: A manufacturing cell having a plurality of work stations, where at least one of the work station comprises a metalworking machine, and where at least one metalworking machine is provided with a modular tooling apparatus. The modular tooling apparatus consists of a base having one or more attachment surfaces, and one or more inserts that can be inserted semi-permanently to the attachment surfaces. The attachment surface is typically a pocket in the surface of the base. The insert has a workpiece support feature that can support and/or secure the workpiece into the proper position and orientation for machining. The base, pockets and inserts are configured to provide a characteristic location and orientation for the workpiece relative to the base, and to the metalworking machine.

Abstract: A circuit board router (10) and method thereof. De-paneling of printed circuit boards (62) off a panel 860) is efficiently increased by a router (40) which is positioned at a location above the panel (60). A fixture positions the panel 860) below the router (40) on a base (16). A controller (64) activates a first drive mechanism (20), a second drive mechanism (26), and a third drive mechanism (32) to guide an X-arm (18), a Y-arm (24) and a Z-arm (10), respectively. The router (40), located on the Z-arm (30), moves downward to engage a router bit (42) to the panel (60) to depanel the printed circuit board (62) from the panel. A fixture chip (72), which has a preprogrammed pattern of the panel (60), is embedded inside the fixture (58). A radio frequency transmitter (80) transmits the pattern to a radio frequency receiver (82) that relays the pattern to the controller (64).

Abstract: A stationary machine tool column supports a spindle head to be movable in an axial direction of the spindle. A table on which a workpiece is mounted is moved in directions orthogonal to the axial direction of the spindle. A cutting liquid feed device is fixed to the column through a support member and includes a cutting liquid nozzle and a shower nozzle. The cutting liquid nozzle is adapted to discharge cutting liquid toward a tool mounted to the spindle. The shower nozzle is adapted todischarge cutting liquid as a curtain of fluid to surround a cutting area.

Abstract: An end surface 820 of a work 80 gripped by a chuck 50 equipped to a main spindle of a lathe-type machine tool is machined, and at the same time has a screw hole 830 formed thereto. The jig plate 60 is provided with a main body 600 having a fixing surface 630 and an inverse tapered portion 610. The jig plate 60 is provided with a bolt 620, and is fixed to the work 80 by a torque wrench tool 70. A chuck claw 122 of a chuck 120 of the second main spindle grips the inverse tapered portion 610 and processes the remaining surfaces of the work.

Abstract: A workpiece engraving machine provides for a way to clamp, align and identify a workpiece for engraving. An engravable band with a permanently embedded flexible engravable tag and a method of engraving the tag in the engraving machine. In a first aspect, a workpiece clamping table comprising a support surface, a clamp, one or more workpiece alignment devices, a positional sensor and a processor. The processor determines the workpiece type, keeps the automatic inventory and may indicate when workpieces need to be ordered. In a second aspect, a workpiece engraving machine may also have workpiece inventory doors which comprise containers with workpiece holders. The containers are attached to the engraving machine by rotators.

Abstract: In a double housing machining center, a table having a plurality of T slots on its top surface is arranged substantially in a horizontal direction. A lower space, into which chips are received, is provided under the table. A plurality of through-holes, being in fluid communication with bottom portions of the T slots and passing through the table to reach the lower space, is scattered and formed in the table. The chips introduced into the T slots are discharged into the lower space through the through-holes. Thus, the chips splashed down onto the table and introduced into the T slots are readily removed and the cleaning work of the table is reduced.

Abstract: In one aspect of the invention a method of manufacturing a thin wall isogrid casing by a chip machining process comprises the steps of: positioning a substantially cylindrical casing (10) on a support (20); the support having a substantially continuous cylindrical support surface (22) engaging at least part of the inner or outer surface of the casing; and machining a plurality of recessed pockets in the said inner or outer surface of the casing opposite the surface engaged by the said support; whereby the support reacts loads acting on the casing by the chip machining tool during machining to minimise distortion of the casing and tearing of the pockets being formed. With this method isogrid pockets (14) can be chip machined, by drilling and/or milling etc, with pocket wall thicknesses of less that 1 mm.

Abstract: A workpiece engraving machine provides for a way to clamp, align and identify a workpiece for engraving. An engravable band with a permanently embedded flexible engravable tag and a method of engraving the tag in the engraving machine. In a first aspect, a workpiece clamping table comprising a support surface, a clamp, one or more workpiece alignment devices, a positional sensor and a processor. The processor determines the workpiece type, keeps the automatic inventory and may indicate when workpieces need to be ordered. In a second aspect, a workpiece engraving machine may also have workpiece inventory doors which comprise containers with workpiece holders. The containers are attached to the engraving machine by rotators.

Abstract: A machine tool 1 comprises a spindle head 11 for supporting a spindle 9 to which a tool 7 is fitted, a column 5 for supporting the spindle head 11 and a table 13 for mounting a workpiece 15, and machines the workpiece 15 by relatively moving the tool and the workpiece. A cavity 5a is defined in the column so that a liquid can be circulated. A liquid pump 19 is provided for circulating the liquid into the cavity 5a. A circulating pump controller 27 is provided for controlling the circulation of the liquid by activating and deactivating the liquid pump 19. By circulating the liquid into the cavity 5a of the column 5, the temperature of each part of the column 5 is evenly maintained to prevent the thermal deformation of the column 5.

Abstract: A coupling device, particularly for vehicle wheels undergoing surface finishing, comprising elements for the releasable fixing of a wheel to a chuck, which act in holes for the passage of screws for fixing the wheel to a hub of a vehicle.

Abstract: A nut member 5 for moving forward and rearward by rotating a feed screw 4 by a stepping motor 28 and a transfer table 7 for transferring a workpiece W are elastically connected by a spring means 24 in transferring of the workpiece to thereby allow the nut member 5 to overrun by flection of the spring means 24, to allow the stepping motor 28 to rotate excessively in a cushioned manner, and to obtain a thrust for pushing the workpiece against an object after the transfer table 7 reaches the transfer end of the workpiece.

Abstract: An inclining and rotating table apparatus comprises a rotating table device having a rotating table, and a support base for rotatably supporting the rotating table having a shaft body provided perpendicular to a rotation axis of the rotating table, and a base for rotatably supporting the rotating table device using the shaft body. A table surface of the rotating table is inclined by making the rotating table device rotate. A first V-shaped groove is directly formed in the shaft body along its rotating direction. The base has a second V-shaped groove opposing the first V-shaped groove. A cross roller bearing is structured by providing rolling bodies, which are placed in contact with the first and second V-shaped grooves and are capable of rolling therebetween, between the shaft body and the base, and arranging a rolling axis of a rolling body perpendicular to that of an adjacent rolling body.

Abstract: A positionable vacuum clamp system including a vacuum table and one or more positionable vacuum clamps which can be of various shapes to accommodate differently shaped workpieces. The positionable vacuum clamp(s) align to the vacuum table having a recessed grid. Each positionable vacuum clamp includes a base plate and a positionable center plate and attached top plate slidingly secured by a retainer washer to the base plate. Vacuum passages within and about the positionable vacuum clamp communicate between the vacuum table and the upper vacuum mating structure of the top plate to vacuumingly secure a workpiece to the top plate for subsequent machining by external equipment.

Abstract: A machine tool has a table body and a drive line on a bed. The table body is linearly movable via a guide member having a sliding or rolling guide surface. The drive line has a ball screw or the like, and moves the table body along the guide surface. A pair of guide members are provided at positions in point symmetry about the position of the center of gravity of the table body. Moreover, a pair of drive lines having the ball screws or the like are provided at positions in point symmetry about the position of the center of gravity of the table body. Alternatively, drive line having the ball screw or the like is provided at the position of the center of gravity of the table body.

Abstract: A guide (12) for setting the depth of cut of a rotary cutting tool, or other hand-held power tool, which automatically locks into a desired position to set the depth of a cut without requiring manual operation of a locking knob or similar structure. The depth guide is released from the locked position by actuation of a release switch (94). The depth guide includes a depth guide base (50), a depth guide shaft (52) attached to the depth guide base, and an automatic locking and release mechanism (54) coupled to the depth guide shaft. The automatic locking and release mechanism and depth guide shaft may be mounted in a handle (24) of the hand-held power tool, such as a detachable handle, for mounting the depth guide to the tool.

Abstract: The present invention is directed to enhancing the accuracy with which tooth restorations are performed, including the manner by which a tooth is prepared and fit with a dental prosthetic, such as a crown or bridge. Further, the present invention is directed to reducing the skill-dependent tasks associated with tooth restoration, including root canals, while at the same time, improving the precision with which these procedures are performed and by aesthetics of the prosthetic. By improving the accuracy of restoration procedures, any need to repeat these procedures for a given patient can be eliminated and patient comfort can be improved. In addition, by improving the precision with which a prosthetic is prepared for attachment to the prepared tooth of a patient, and/or fit to patient, durability and longevity of the prosthetic are improved.

Abstract: A chucking device, in particular for workpieces that are to be machined on more than one side, has a workpiece carrier with at least one turret, arranged to receive workpieces, that is supported rotatably about an axis of rotation on the workpiece carrier, A positive-engagement locking device is associated with the turret, on the workpiece carrier, by which locking device the turret can be locked positionally precisely in a predetermined rotary angle position relative to the workpiece carrier. The locking device has at least three locking parts disposed coaxially to one another, which on the plane faces facing one another each carry pairs of cooperating locking means that can be brought into and out of engagement with one another by means of an axial relative motion of the locking parts.

Abstract: A method of machining a plurality of workpieces in an unmanned manner, including the steps of holding, with a jig, a first one of the workpieces, attaching the jig holding the first workpiece, to a workpiece holding device of at least one machining device, so that the first workpiece is machined by the machining device, detaching, after the machining of the first workpiece, the jig holding the first workpiece, from the workpiece holding device, removing the first workpiece from the jig, and holding, with the jig, a second one of the workpieces, and repeating the attaching step, the detaching step, and removing step.

Abstract: Apparatus for orienting a pair of framed eyeglasses relative to an electronic scanner whereby the scanner then generated digital data defining the geometry of the frame. This data is entered into a computer to cause it to control a milling machine which shapes a blank to form a filter lens for an accessory that clips onto the frame and has a matching geometry.

Abstract: A guard for use with a woodworking machine having a worktable and a cutting tool for performing operations on a workpiece is disclosed. A guard in accordance with the present invention comprises a guard member having a body portion, a workpiece engaging portion, and a machine engaging portion. The workpiece engaging portion of the guard member includes a workpiece engaging surface. The workpiece engaging surface is preferably configured such that the body portion of the guard member is deflected when the workpiece is urged against the workpiece engaging surface in a direction substantially parallel to a working surface of the worktable for engagement with the cutting tool.

Abstract: The present invention provides a work table for use with a tool, comprising an inclined work surface, which is substantially planar and is supported by a frame having a base; a gantry movably attached to the work surface and having two ends, a longitudinal axis and extending within a plane parallel to the work surface; a movable tool mount slidably attached to the gantry for removable attachment of the tool wherein the tool mount and the tool have a combined effective weight; a first movement means attached to one end of said gantry for translation of the gantry over said work surface; a second movement means attached to the tool mount for translation of said tool between the ends of the gantry; and a weight counterbalancing means operatively associated with the tool mount for neutralising the combined effective weight.

Abstract: A worktable apparatus for a machine tool, such as a CNC punch press, a laser equipped machine tool or plasma torch equipped machine tool, which processes a metal sheet or plate workpiece. The worktable apparatus serves a dual function as (a) a worktable that supports a workpiece during processing by a machine tool and as (b) an unloading station for unloading a workpiece or a skeletal remnant produced by the machine tool. The machine tool has a set of workclamps, which move under CNC control along at least one of the numerically controlled axes, grip the workpiece and carry it through the machine for processing. Located on one side of the machine tool, the worktable apparatus has a surface adapted to allow the workpiece to ride smoothly under the motive power of the workclamps.

Abstract: A system that allows support of a work piece from the body of a vise, the vise being attached to the bed of a mill. The system an extender block that attaches to one of the jaws of the vise; and an angular surface plate attached to the extender block. The angular surface plate provides a surface that extends along a plane that extends next to and below the bed of the mill.

Abstract: A robots (210A, 210B), which is fixed onto a base (20, 20B) having a rectangular shape, has a mechanical hand (211A, 211B). A plurality of robot tools, each of which is freely attached to the tip of the mechanical hand (211A, 211B) for pinching a part, and a plurality of trays (6) each containing assembling jigs to be used for assembling parts, are brought in a movable range (RA, RB) of the robot, and the assembling tools are set at a predetermined position within the movable range (RA, RB). Then, an assembling job for the parts is carried out by using the assembling tools thus set. With this arrangement, the exchanging processes of the assembling tools can be carried out without depending on the human hands, even when the type of the assembly product is changed. Consequently, it becomes possible to efficiently carry out the manufacturing process of a small number of many types of products.

Abstract: A clamp for securing an oversized work-piece to a milling machine table using the T-slot on the front surface of a Bridgeport-type milling machine table. The clamp, when attached to the T-slot, extends beyond the table and over it where it can be tightened down on a work-piece to hold it to the top surface of the table. The clamp includes a heel block and a clamp block held in spaced relation by a separation bolt and a tightening bolt. To mill an oversized work-piece, the clamp is inserted into the T-slot and then the separation distance of the clamp block to the heel block is adjusted by rotating the clamp block around the separation bolt until the separation distance is slightly wider than the thickness of the work-piece. The tightening bolt is then used to tighten the clamp onto the work-piece. The nose end of the heel block can be shaped to match the profile of the T-slot or can be modified to allow the nose to be rotated into the slot by rounding its corners.

Abstract: A chucking device, in particular for workpieces that are to be machined on more than one side, has a workpiece carrier with at least one turret, arranged to receive workpieces, that is supported rotatably about an axis of rotation on the workpiece carrier, A positive-engagement locking device is associated with the turret, on the workpiece carrier, by which locking device the turret can be locked positionally precisely in a predetermined rotary angle position relative to the workpiece carrier. The locking device has at least three locking parts disposed coaxially to one another, which on the plane faces facing one another each carry pairs of cooperating locking means that can be brought into and out of engagement with one another by means of an axial relative motion of the locking parts.

Abstract: A working table apparatus for a cutting machine tool comprising a working table slidably mounted on a bed of the machine tool, and positioning members mounted on the under side of the working table that are selectively projectable from or retractable into a work supporting surface of the working table. The positioning members comprise a group including a first plurality of positioning members arranged in a row either in a direction parallel with the sliding direction of the working table or in a direction perpendicular thereto and at least one second positioning member arranged offset from the row of the first positioning members.

Abstract: A system for holding or transporting engraveable workpieces of different configurations is provided. The system includes a first workpiece carrier that has an internal relief configured to receive a first workpiece having a first configuration. The system also includes a second workpiece carrier that has an internal relief configured to receive a second workpiece having a second configuration. The outer surface of the second workpiece carrier is substantially the same as the outer shape of the first workpiece carrier, to thereby provide a carrier of uniform outer dimensions regardless of the workpiece configuration. The carrier may hold the workpiece within the internal relief through a snap lock and in such a manner as to avoid contact with and possible damage from an adjacently stored workpiece.

Abstract: A mounting fixture for a reconfigurable assembly machine having a plurality of modules with slots formed in their upper surfaces includes a square or rectangular solid block having a plurality of threaded openings. The openings receive fasteners adapted to secure various and diverse assembly machine components and devices to the mounting fixture. One surface of the block includes a channel or keyway having a width equal to the width of the throat of the slots formed in the upper surface of the assembly machine module. A locating key is received in the keyway in the block and the throat of the T-slot. The locating key includes through openings which receive threaded fasteners having heads held captive and the T-slot which, with suitable nuts, secure the block to the upper surface of the module.

Abstract: A machining tool for dry processing includes an encapsulated workspace having arranged therein a workpiece support which is displaceable on a machine bed. The guide members of the workpiece carrier are arranged externally of the workspace, so that chip removal is not impeded by the workpiece support guide members.

Abstract: A system for constructing devices for chucking workpieces in defined and reproducible positions on machine tools and measuring machines includes a mounting pipe which has grid points formed at regular coordinate distances and is provided in the longitudinal direction of the pipe with chamfers uniformly distributed over the circumference, wherein the grid points are formed on the chamfers in the form of concave spherical recesses, and wherein the center points of the spherical recesses are located on lines which extend parallel to the chamfers outside of the pipe body and which describe the ideal pipe shape.

Abstract: An elongated and cross-section polygonal work piece carrier (1) has at least two clamping surfaces (2) extending parallel to its longitudinal axis (3). It is retained in bearing (5, 9) at least at one end, to be rotatable about its longitudinal axis over 360°. Each of the clamping surfaces (2) is supplied with at least two rotatable work piece holding tables (11) located in a row adjacent each other. The holding tables (11) are coupled by gears (25, 26, 33) with each other and with a common drive gear (35) in such a manner that all tables, in dependence on the rotation of the work piece carrier (1) about its longitudinal axis (3), will rotate over its respective rotation axis (12) about a predetermined angle, depending on the angle of rotation of the work piece carrier; an interrogation device is provided to interrogate whether all rotated tables are in predetermined, locked angular positions.

Abstract: Described is a draw-in nipple for fastening a palette on a machine tool, with the draw-in nipple for fastening of the palette being received by a rapid-action clamping system, with the draw-in nipple being attached afflicted with clearance on the palette and through application of a tension force in its longitudinal direction away from the palette being lockable free of clearance. The draw-in nipple is herein preferably received in a resilient element which upon exertion of a tension force becomes deformed and locked through the draw-in nipple.

Abstract: A hybrid tool serves as a form on which constituent materials are applied for bonding or curing into a part in a desired configuration. It also serves as a holder for the bonded or cured materials in the originally applied position during subsequent machining. The hybrid tool is made by fabricating a face sheet of composite material having a facing surface configured to the reverse of a desired shape of one surface of a part to be made on the tool. The actual part will be laid up on the facing surface, cured while on the tool, and even trimmed before release. Base structure of the tool holds the facing surface of the face sheet in the desired shape, and includes ground-engaging pads that define an “A” datum plane. The tool aligns a reference plane of the face sheet parallel to the datum plane. A substantially continuous groove in the face sheet, used for trimming the part, opens in the facing surface.

Abstract: Apparatus for supporting a selected number of workpieces at a machining center, each workpiece support having a sleeve within which is reciprocably accommodated a workpiece bearing member cooperable with the sleeve to clamp and unclamp a workpiece in a selected position for machining. The workpiece may be clamped axially or transversely of the sleeve and, when clamped transversely, in a position selectively normal or inclined to the axis of reciprocation.

Abstract: In a machine tool having a worktable feed mechanism of the type that a worktable is moved in a horizontal direction relative to a tool spindle along a pair of guideways in parallel with the horizontal direction, there is provided a cutting chips collection space formed between the pair of guideways fixed to a base. A pair of ball screws are arranged outside of the cutting chips collection space for moving the worktable relative to the tool spindle in the horizontal direction. The cutting chips and coolant generated by contacting a tool with a workpiece drop into the cutting chips collection space directly without being heaped onto a cover mechanism of the worktable feed mechanism.

Abstract: The invention relates to a novel machine tool system provided with selectively energizable magnets for selectively moving a support for a work piece clamping plate into a floating condition and for changing the disposition of the clamping plate relative to operating tools. The floating condition permits movement of the clamping plate substantially without frictional engagement between the clamping plate support and structure such as a machine bed on which the support is movably mounted.

Abstract: A CNC machine tool has a plurality of collet chucks in a fixture that requires loading workpieces in these collets by hand. The workpieces are first assembled on a loading bar or holder so they can be collectively loaded in the ganged collet chuck for machining in the CNC machine. The holder has spaced stations, and each station includes a standard base adapter and an individualized parts adapter that fits onto the base adapter. Each parts adapter will be configured to accept a part to be machined.

Abstract: A machine tool having a base unit, a table mounted on the base unit, at least one workpiece support member mounted on the table having a work support surface disposed at an angle to the horizontal, devices for removeably securing a workpiece on the work support surface and a tool operatively engageable with a workpiece secured on the workpiece support surface for performing a work function thereon.

Abstract: The present invention relates to a clamping cylinder for pulling-in and clamping a pull-in nipple as well as to the nipple itself and to a clamping system comprising a clamping cylinder and a pull-in nipple. The nipple may repeatedly be pulled in the clamping cylinder in an exactly reproduceable position. The clamping cylinder is provided with a central bore extending through the clamping cylinder and adapted to receive the nipple, pull it in and lock it. The cylinder is provided with cleansing means to dispense a cleaning fluid, while the nipple is provided with at least one cutting member.

Abstract: A cutting apparatus that performs cutting operations without being held by an operator and that is applicable to various cutting operations in addition to forming a biscuit groove. The cutting apparatus comprises a first base portion having a mount surface on which a work is mounted; a second base portion having an abutment surface with which a work surface to be worked is brought into contact; and a cutter holding portion capable of holding a circular saw blade so as to extend beyond the abutment surface toward the work. The cutter holding portion is turnable, with respect to the second base portion, around an axis perpendicular to the abutment surface.

Abstract: The present invention is directed to an adapter arm for coupling a fabrication tool or workpiece to the work table of a machine tool, the adapter arm comprising an elongated shaft having first and second ends, the first end being adapted to be removably connected to the work table, and a clamping device attached to the second end for releasably securing the tool or workpiece to the shaft, whereby movement of the work table is translated to the tool or workpiece through the shaft.

Abstract: Table extensions for use with a numerically controlled (CNC) milling machine are disclosed. A gauge table extension has a platform, and means for feeding a workpiece along the platform into the milling machine. A number of support means hold up the platform and feeding means. Lower guide rails attached to each of the support means and upper guide rails attached to the platform transverse to the lower guide rails connect to the lower guide rails through a number of dual-axis bearings that allow the platform to be translated with respect to the support means. A catch tray catches filings and coolant that result from the machining process and recycles the coolant to the CNC milling machine.

Abstract: A machine tool for machining panels, plates and discs, is fitted with a number of workpiece clamping devices (10) that move along a work bench (20) of the machine tool. The machine tool has sensors (8) designed to detect the position of the clamping devices (10), and a unit (2) built into the operating head (15) of the machine tool, which engages the clamping devices (10) to moves them to preset positions on the bench (20) by one or more relative movements between the head (15) and the bench (20).

Abstract: The present invention comprises a ceiling tile cutting apparatus for the cutting and edging of successive tiles with corresponding angular cuts in a corresponding manner. The apparatus comprises a plurality of vertically arranged support legs connected by a plurality of horizontal members and a planar table member of generally rectilinear configuration attached at the upper end of the support legs. The table member has a first or proximal edge, a second or distal edge parallel to the first edge, a left hand edge and a right hand edge generally parallel to the left edge. An elongated slot extends through the table member parallel to the right hand edge of the table. A pair of guide rails supported over the elongated slot, and a motorized cutting tool mechanism is arranged to slide on the guide rails, with a cutting tool extending into the slot. An adjustable telescopable ruler is pivotably arranged on the table.

Abstract: A tombstone fixture for supporting workpieces has a stiffened tooling column.

Abstract: An apparatus for cutting a piece of work has a work supporting table which is movable only in one horizontal direction, and a spindle unit including a cutting tool which is disposed below the table for cutting the work from below. The spindle unit is movable in another horizontal direction perpendicular to the direction in which the table is movable, and in a vertical direction. The apparatus requires only a small space for installation, is simple in construction, an can perform an accurate cutting job at a high speed.