Abstract: A CNC machine tool includes a worktable supporting two workpieces and rotatable on a base so as to exchange the positions of the workpieces. A post member is fixed on the base. A first horizontal rail unit is movable vertically on the post member. A second horizontal rail unit is movable on the first horizontal rail unit along a first horizontal direction. A spindle head unit is movable on the second horizontal rail unit along a second horizontal direction perpendicular to the first horizontal direction.

Abstract: Machining is possible in such a manner that an optional position of a workpiece is positioned just under a tool by rotation of a turn table in a C-axis direction, movement of the turn table in a Y-axis direction, and movement of a spindle in a Z-axis direction, so that a width of a main unit in a X-axis direction can be made shorter in comparison with machining by moving the turn table in the X-axis direction. Besides, the turn table located on a front side of the main unit, an ATC located on the rear side thereof, and a separated control panel located on the rear side of the ATC, independent from the main unit can also make the width of a machining center in the X-axis direction shorter.

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: The present invention provides a machine tool capable of achieving a higher feed rate of a spindle and weight reduction while ensuring necessary stiffness of a column. The present invention includes: a bed; a saddle disposed on the bed to be movable in a Y-axis direction in a front view of the machine; a table disposed on the saddle to be movable in an X-axis direction; a column having a shape of a gate that is bridged over a travel range of the table and has right and left legs fixed on the bed and a beam connecting tops of the right and left legs; and a spindle head disposed on a front face of the beam to be movable in a Z-axis direction.

Abstract: A machine tool for performing a machine tool function including components adapted to cooperate with each other to execute the machine tool function. The machine tool has a number of constituent parts and a number of sheets of damping material. Each component includes constituent parts with sheets of damping material interposed between the constituent parts. The sheets dampen vibration of the machine tool during performance of the machine tool function.

Abstract: A spindle motor as a heating element and a spindle head having a spindle that is driven by the spindle motor are coupled to each other by a cooling flange. The cooling flange is provided with a cooling passage, the cross-sectional area of which gradually increases with distance from its gas inlet toward its gas outlet. When a high-pressure gas is injected into the cooling passage through the gas inlet, it is adiabatically expanded and cooled by the cooling passage having the gradually increasing cross-sectional area. Thus, the cooling flange restrains heat generated from the spindle motor from being transmitted to the spindle head.

Abstract: A machine tool includes X-axis, Y-axis, and Z-axis moving units for producing relative movements between a tool and a workpiece; a C-axis drive unit for rotating the workpiece about a C-axis parallel to the Z-axis; and a B-axis turning unit for turning the tool about a B-axis parallel to the Y-axis. The tool is disposed in such a manner that a machining point of the tool coincides with the B-axis. The moving units, the drive unit, and the turning unit are controlled in such a manner that a work point of the workpiece coincides with the machining point of the tool. The bed is formed through casting and has a hollow structure and a hole as cast; and a cover is provided to cover the hole as cast in order to close the interior of the bed.

Abstract: A machine tool for machining large-area workpieces. A column can be moved along one coordinate axis over a long bed. A machining unit, movable at the movable column along at least two other coordinate axes, has a pivotable working spindle. At least one approximately plate-like work carrier can be pivoted from a horizontal set-up position into a vertical machining position. A tripod configuration of the machining unit has a central support pipe and three telescopic legs spaced about 120° with respect to one another. The movable column has, in a central recess, a universal bearing supporting the central support pipe. In each of two lower and one upper recesses a universal bearing for the telescopic legs is provided. A retainer supporting the pivotable working spindle is positioned next to the work area on one end of the central support pipe and is rotatable about an axis of the central support pipe.

Abstract: A cutting machine includes linear electrical actuation for controlling linear reciprocating movement of a spindle and cutting tool. The cutting machine is suited for gear shaping cutting operations and the like. Linear electrical actuation may be used to control position of a hydraulic valve within the spindle, which controls hydraulic actuation and linear movement of the spindle. Linear electrical actuation may also be used to pivot the spindle to relieve the cutting and/or during the cutting stroke for gear crowning operations. A rotary actuator is also disclosed as incorporated into the pivoting saddle of such a cutting machine.

Abstract: A machining unit has a spindle-carrier structure, which can be oriented around a vertical axis.

Abstract: A C-type column structure. The C-type column structure includes a hollow column, a column extending portion, and a support portion. The hollow column is formed with a closed U-shaped cross section, a curved portion, a trapezoid portion, a first end surface, and a second end surface. The curved portion is connected to the trapezoid portion to form the hollow column. The first end surface is opposite to the second end surface. The hollow column expands uniformly from the first end surface to the second end surface and has a predetermined thickness. The column extending portion is connected to the trapezoid portion and is adjacent to the first end surface. The support portion is connected to the trapezoid and column extending portions and is under the column extending portion.

Abstract: Machining is possible in such a manner that an optional position of a workpiece is positioned just under a tool by rotation of a turn table in a C-axis direction and movement of a spindle on a Y-Z plane, so that a width of a main unit in a X-axis direction can be made shorter in comparison with machining by moving the turn table in the X-axis direction. Besides, the turn table located on a front side of the main unit, an ATC located on the rear side thereof, and a separated control panel located on the rear side of the ATC, independent from the main unit can also make the width of a machining centre in the X-axis direction shorter.

Abstract: The present invention provides a chip discharging device for a machine tool, which is capable of making the entire machine small by minimizing a protruding amount of the chip discharging device toward the backside of the machine, and making an install space thereof small. A column 4 is arranged and fixed on an upper surface of a rear wall portion 2d of a bed 2, the rear wall portion 2d is arranged to deviate upward, rear wall inclined surfaces 2g and 2g? rising obliquely upward are formed on a bottom portion of the rear wall portion 2d, a storage tank 27 for storing coolant is arranged inside a rectangular frame of the bed 2, the storage tank 27 having a form which extends through a space beneath the rear wall portion 2d to the backside of the machine and further stands up obliquely upward along the rear wall inclined surfaces 2g and 2g?, and a chip conveyor 26 is arranged inside the storage tank 27 for conveying chips to the backside of the machine.

Abstract: The present invention provides a machine tool capable of enhancing chip discharge efficiency and improving work efficiency with improved approachability to a spindle. A machine tool according to the present invention is structured such that a recession 2c with a back face side and an upper face side thereof opened is formed at a center portion of a bed 2, Y-axis guide rails 18 and Y-axis ball screws (drive shafts) 16 for guiding and driving the saddle 4 are disposed on right and left saddle supports (edges) 2b of the recession 2c and are covered with right and left Y-axis cutting covers 56, the right and left Y-axis cutting covers 56 are formed in an inclined shape with the recession 2c side thereof becoming lower, and a chip receptor 48 for discharging chips dropped into the recession 2c to a back face side of the bed 2 is disposed in the recession 2c.

Abstract: A machine tool having at least one or more spindles that can be positioned in space, the spindle being mounted on displaceable slides by rods and the displacement of the slides leading to the spindle being positioned in space. A correction device is provided which defines the actual position of the spindle relating to one or more reference points.

Abstract: In the multi-axial machine tool, a table unit is detachably mounted on the upper surface of the interior portion of a portal bed disposed on a leg. The table unit comprises a table base fixed to the upper surface of the leg, a turning table which, when it is viewed at a reference working position, is turnably disposed on an inclined turning surface of the table base formed so as to be inclined in a descending manner toward a front side of the machine tool, and a work table disposed on the table support portion of the turning table so as to be turnable around axes lying in parallel with the axis of a spindle.

Abstract: In a vertical lathe of an open side column type, a pair of linear guides (65,66) arranged in parallel in a cross rail (62), and a space portion (67) is formed between them (65,66). A saddle (90) is supported by the linear guides (65, 66) above the space portion (67) and moved in an axis direction (X axis). A ram (120) is suspended through the space portion (67) and moved in a vertical direction (X axis). A rotary driving disc (34) fixed on the table rotation driving shalt (33) is connected to a rotary table (30) by plural torque transmission pins (37) in torque transmission relationship. Thereby, the rotary table (30) rotates in carrier method. A tool holder (151) is rotatably driven at an optional angle position (B axis position) by a B axis servomotor (163) about a horizontal axis. The tool holder (151) is clamped at an optional rotation angle position by a thrust static pressure bearing under oil-pressure supply to one of thrust static pressure portions.

Abstract: In an automatic machine tool (1) comprising a spindle mounting slide (4) which is driven by a linear electric motor (9) in a vertical direction (V) in a slideway (8), the slide (4) is equipped with a counterweight device (13) comprising a cylinder (19) within which there slides a piston 17. The cylinder (19) and the piston (17) form a first balancing chamber (31) and a second counterbalancing chamber (32), the second counterbalancing chamber (32) being connected to a circuit (33) for feeding a fluid (34) under pressure.

Abstract: A column-type machining arrangement for machining a workpiece is provided, including a machine bed; a traversable column slidably coupled to the machine bed; a tool carrier coupled to the column, the tool carrier configured to detachably couple to a tool for machining the workpiece; a plurality guideways to guide the traversable column on the machine bed, the guideways including a first guideway arranged on the machine bed below the column and a second guideway arranged centrally and laterally next to the column at a height equal to approximately half a height of the column; and a first drive arrangement configured to cause the column to slidably traverse on the machine bed, the first drive arrangement acting on the column at a level of the second guideway.

Abstract: The invention concerns a very high-speed machining machine-tool (M) consisting of a parallel structure including link bars (100) whereof one first end (110) is linked to a mobile member (200) supporting at least a tool and whereof the second end (120) is linked to at least means (300) setting it in motion relative to a frame (B). The said machine-tool is characterized in that the linkages (400) to the ends (100 [sic, should be 110. -Translation Editor) and 120) of the said bars (100) consist in an association of fictitious pivots (410, 420, 430) so as to form a joint whereof the degrees of freedom enable the parallel structure to be set in motion. The said feature enables to avoid all drawbacks related to ball linkages. The invention is applicable to high-speed machining.

Abstract: A machine tool capable of performing an accurate machining by preventing a second saddle 6 from displacing aslant to suppress the vibrations of a spindle head 8, wherein a column 2 is fixedly installed on bed 1, a first saddle 4 is movably guided by the column 2 in vertical direction f1, a second saddle 6 is movably guided by the first saddle 4 in lateral direction f2, a spindle head 8 is movably guided by the second saddle 6 in longitudinal direction 18, and interfitted guide route devices 5A, 5B, 5C for guiding the second saddle 6 in lateral direction f2 are formed at the rear lower position of the first saddle 4 as well as at the front upper and lower positions of the first saddle 4.

Abstract: A device for using a parallel structure designed for positioning and displacing a mobile member including at least a fixed element and at least three actuators each including a fixed part and a mobile part, the mobile member including a support-sheath of a tool spindle. The device includes a balancing assembly which, enabling the support-sheath to move in rectilinear manner along axes X, Y and Z, maintains the support-sheath such that the weight of the support-sheath is not transferred to the parallel structure.

Abstract: It is an object of the present invention to provide a bed of a machine tool to be stably leveled and supported by three support points and to reduce the strain of the bed of which structure is simplified.

Abstract: A dental measuring and machining system includes a measuring and machining unit for preparing measurement data by measuring a prosthesis model based on a predetermined algorithm and for producing a prosthesis by machining a prosthesis block based on the above measurement data, and an operating unit for operating the measuring and machining unit from the outside. A user is able to produce a dental prosthesis by operating the measuring and machining unit under the control of a computer. The measuring and machining unit is connected to the external operating unit by communication, and the measuring and machining unit can be operated from the outside.

Abstract: An automated quill drive assembly is adapted to be retrofit on a milling machine having a frame presenting a quill head and a quill supported on the head for rotation and for relative shiftable movement along a linear axis between retracted and extended positions. The quill head includes a centrally disposed lower lug, a quill feed engagement control lever boss located above and spaced to one side of the lug, and a transmission cover opening located above and spaced to a side of the lug opposite the quill feed engagement control lever boss. The automated quill drive assembly includes a housing adapted to be mounted to the lug, the quill feed engagement control lever boss, and the transmission cover opening, a motor supported on the housing, and a transmission supported on the housing for transmitting automated movement from the motor to the quill to move the quill between the retracted and extended positions.

Abstract: A machine with X-axis double speed mechanism includes two axles along which the work piece carrying assembly and the tool fixing assembly are respectively moved in parallel with each other. The work piece carrying assembly and the tool fixing assembly are moved relatively so as to double the relative speed and to shorten the length of the machine.

Abstract: A multi-axis Cartesian guided parallel kinematic machine has a frame, a base platform, a multi-axis Cartesian guiding mechanism assembly, multiple driving strut assemblies and a motion platform. The motion platform is connected to the base platform through the driving strut assemblies and the multi-axis Cartesian guiding mechanism assembly. The multi-axis Cartesian guiding mechanism assembly has multiple linear guiding mechanisms and rotary guiding mechanisms that are in-serial linked and arranged in orthogonal to each other according to the Cartesian coordinate system. The multiple driving strut assemblies are in-parallel connected to the base platform and the motion platform using pivot joints. Each driving strut assembly is a telescoping strut assembly or a sliding strut assembly. When the driving strut assemblies are actuated, the motion platforms can be driven to a desired position in the Cartesian workspace with a controllable platform orientation relative to the frame.

Abstract: A milling and drilling machine for rod-shaped material. A motor-driven spindle head is movable on a column along a first coordinate axis and includes a work spindle capable of selectively accommodating milling and turning tools. A separating device transversely separates the rod-shaped material. A clamping device, disposed laterally alongside the workspace, has a workpiece holder with a clamping axis along a horizontal coordinate axis. A rotary drive is provided for the workpiece holder. The spindle head is pivotable about a Y axis at the front side of a headstock movable in the direction of the Y coordinate axis. The headstock is disposed on a motor-driven slide movable on the stationary column along an X coordinate axis parallel to the workpiece clamping axis. The clamping device is disposed on an inclined console located on the face of the column and movable along the Z coordinate axis in guides.

Abstract: The structure for symmetrically disposed linear motor operated tool machine comprises two parallelly erected sustaining walls, a movable gantry, a sliding saddle, a tool spindle, and a weight compensation device. At both sides of the movable gantry between the sustaining walls, between the gantry and the sliding saddle, and between the tool spindle and the sliding saddle, a pair of linear motors is symmetrically disposed such that the armature reaction between the winding and magnet is compensated each other by the opposite one therefore any possible deformation force to the tool machine structure is eliminated.

Abstract: A numerically controlled machine tool is disclosed including a spindle support structure for moving the spindle having a tool mounted thereon in directions along an X-axis, a Y-axis and a Z-axis, a workpiece support structure having an indexing workpiece mounting table, and a chip discharge means located between the spindle support structure and the workpiece support structure for discharging chips produced in the machining area to the outside. Since the workpiece mounting table is allowed for rotational indexing, the setup process for the workpiece can be performed with the workpiece mounting surface of the workpiece mounting table facing upward, and therefore the setup process can be shortened while at the same time improving the machine operating rate. Also, since the spindle support structure, the workpiece support structure and the chip discharge means can be configured separately from each other, the machine tool can be manufactured and installed easily.

Abstract: A machine tool for at least triaxial machining of work pieces comprises a column of the type of a casing with side walls. In an interior space, provision is made for a work spindle which projects into a working area and which is connected via couplers and hinges to a driving skid that is displaceably guided on each side wall straight in a y direction. The driving skids are displaceably guided on two guides which are spaced from each other in the z direction. Provided between the guides are linear motors, a first part of which is mounted on the driving skid and a second part on the side wall.

Abstract: A method for lengthening the machining travel of a machine-tool operating at a very high speed, including a tool-carrying ram mobile on three axes. The method combines with the machining movements of the tool-carrying ram along one or several axes, one or several rectilinear movements of the part to be machined by parametering and digitizing the relative travels and speeds of the part to be machined with respect to the tool-carrying ram. The invention also concerns the device for implementing this method and the machine-tool using such a device.

Abstract: A machining machine-tool having a fixed frame with a closed structure. The machining zone is delimited by the fixed frame internal surfaces and includes a machining head supporting the driving unit of a machine-tool. The machine-tool fixed frame has a C-shaped profile, and ends of branches of the C are linked to the machine-tool machining head. The ergonomic arrangement of the machine-tool functional parts is also considered.

Abstract: The invention relates to a machining center provided with a workpiece machining tool. Said machine tool comprises: an essentially horizontal working plate (10) which is supported by a machine tool stand (2); a workpiece support (20) which is accommodates a workpiece (2) and which is placed on the working plate (10); a machining head (30) which accommodates a machining tool (29) and which is mounted on a vertical machining column (32) that can pivot around a vertical axis (37) by means of a rotary plate (36), said rotary plate being arranged underneath the working plate (10) and integrated in the machine stand (2), and; a first carrying arm (34) for the machining column (32). One end of said carrying arm is connected in a fixed manner to the rotary plate (36), and the other end is laterally guided out over the working plate (10) in such a manner that the machining column (32) mounted there can be pivoted around the working plate (10).

Abstract: A machine tool for machining large-area workpieces. A column can be moved along one coordinate axis over a long bed. A machining unit, movable at the movable column along at least two other coordinate axes, has a pivotable working spindle. At least one approximately plate-like work carrier can be pivoted from a horizontal set-up position into a vertical machining position. A tripod configuration of the machining unit has a central support pipe and three telescopic legs spaced about 120° with respect to one another. The movable column has, in a central recess, a universal bearing supporting the central support pipe. In each of two lower and one upper recesses a universal bearing for the telescopic legs is provided. A retainer supporting the pivotable working spindle is positioned next to the work area on one end of the central support pipe and is rotatable about an axis of the central support pipe.

Abstract: A semi-contact guide apparatus includes a bed as a first member, a column as a second member, a plural number of oil-hold portions and an oil-supply device. The column is movably guided on the bed. A sliding surface is formed on the column. The plural number of oil-hold portions is formed on the sliding surface. Dimensions of the oil-hold portions are defined according to load distribution of the weight of the column. The oil-supply device supplies lubricant oil to the oil-hold portions. The amount of lubricant oil supplied to the oil-hold portion is defined according to each of dimensions of the oil-hold portions. Since the dimensions such as areas of the oil-hold portions and the amount of the lubricant oil supplied to the oil-hold portion are defined as above, inclination of the column on the bed is prevented, and the column can be smoothly moved on the bed.

Abstract: The structure for symmetrically disposed linear motor operated tool machine comprises two parallelly erected sustaining walls, a movable gantry, a sliding saddle, a tool spindle, and a weight compensation device. At both sides of the movable gantry between the sustaining walls, between the gantry and the sliding saddle, and between the tool spindle and the sliding saddle, a pair of linear motors is symmetrically disposed such that the armature reaction between the winding and magnet is compensated each other by the opposite one therefore any possible deformation force to the tool machine structure is eliminated.

Abstract: The present invention is related to micro-motion machine and micro-element fabricating machine using a 3-degree-of-freedom parallel mechanism. A micro-motion machine achieves a 3-degree-of-freedom micro movement by connecting two arms connected to prismatic flexible joints respectively, adapted to conduct vertical movements, by revolute flexible joints, and one arm connected to another prismatic flexible joint, adapted to conduct vertical movements by universal joint, to a platform by universal joint. This micro-motion machine has a relatively simple and inexpensive construction, high stiffness, and high accuracy, while exhibiting reduced inertia.

Abstract: The invention deals with a machine tool with a tool spindle holding device which is connected over at least one rod with a slide stand. The slide stand can move on a guide. The positioning of the tool spindle holding device is accompanied by the positioning of the slide stand. The tool spindle holding device carries at least two tool spindles.

Abstract: A machine tool driven by linear motors along a plurality of axes, and unusually robust and rigid, comprises a bed which defines at least a first axis, at least one column operably connected and supported only at one of its ends by said bed, for its guided movement along the first axis, said at least one column extending away from the bed to define a second axis, at least one saddle mount operably connected and supported by the at least one column, for its guided movement along the second axis, at least one main saddle supported by the saddle mount, for its guided movement along a third axis and supporting a spindle for the movement of a tool, wherein said at least one column comprises a portal structure having a first shoulder opposed to a second shoulder such as to define a window within which the saddle mount is arranged, and wherein, between said opposed shoulders and the saddle mount, linear motors are interposed such as to move the saddle mount along said second axis, producing an effect of attraction of

Abstract: With high speed machine tools, there is a desire to dampen vibrations and to retain the damper mass in proper position. The present invention relates to a tuned damped absorber support providing simultaneous energy dissipation in both horizontal and vertical directions which also provides for proper mass position retention. The tuned damped absorber assembly is attached directly or indirectly to a machine component requiring damping. Both single damper mass and double damper mass configurations are shown. With a double damper mass, the system can be tuned to two different frequencies. Therefore, the double damper mass provides for optimization in both a vertical and a horizontal direction.

Abstract: The invention concerns a very high-speed machining machine-tool (M) consisting of a parallel structure including link bars (100) whereof one first end (110) is linked to a mobile member (200) supporting at least a tool and whereof the second end (120) is linked to at least means (300) setting it in motion relative to a frame (B). The said machine-tool is characterized in that the linkages (400) to the ends (100 [sic, should be 110.—Translation Editor) and 120) of the said bars (100) consist in an association of fictitious pivots (410, 420, 430) so as to form a joint whereof the degrees of freedom enable the parallel structure to be set in motion. The said feature enables to avoid all drawbacks related to ball linkages. The invention is applicable to high-speed machining.

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 relatively compact, program-controlled, universal combined milling and boring machine having a horizontal base as a support for a work table, a machine frame and a supporting system for at least one spindle head. The spindle head contains a dimensionally stable central tube, a spindle head support mounted on the lower end thereof, three telescopic bars arranged at a solid angle displacement of about 120° and coupled to the spindle head support in universal bearings, and an upper support member having universal bearings for the central tube and for each telescopic bar. The machine frame is preferably provided together with the base as an integrated, dimensionally stable, support structure and has two side walls, a top, front traverse and a lower rear wall. The supporting member of the supporting system is inclined between the top side of rear wall and the traverse.

Abstract: A milling machine with a rotating drivable machine tool spindle perpendicular to a work piece stage slanting downward and away from the front side of the machine bed displaceable along the Z-axis that may be displaced via a first carriage along the Y-axis, and via a second carriage along the X-axis on guides mounted to the machine bed. A chip collection chamber is provided behind the work stage surface when in the operating position. The guides for the second carriage are provided on opposing struts of a portal frame parallel to the work tensioning surface, that is connected on its front side by means of lateral front support areas and on its rear side directly with the machine bed.

Abstract: A high speed machining machine tool (M) of the type that allows the independent setting into motion along at least three axis of two tool carrying slide (100 and 100′). This machine tool implements said motions of each slide by linear motors.

Abstract: A machine tool comprises a rack, a horizontally displaceable x skid and a y skid that is vertically displaceable thereon. The skids are drivable by linear motors which are arranged on the front side of the rack and the face side of the x skid, respectively, and on the rear side of the x skid and the rear side of the y skid, respectively. The same may apply to the x guides and the y guides. The air gaps of the linear motors of each skid are arranged in one plane.

Abstract: A machine tool with an improved capability of discharging and collecting the cutting chips is disclosed. A bed (13) is provided with troughs (39) extending through the bed (13) in a direction substantially perpendicular to a direction of the movement of a table (15). The cutting chips are collected in the troughs (39) through a plurality of chutes (47) which have openings inclined downward towards the troughs (39) and which are provided below the upper surface of the table 15, to be discharged to the outside through chip discharge means (41) disposed in the troughs (39).

Abstract: In a machine tool of the type comprising a spindle mounting slide which is driven by a linear electric motor and which runs in a vertical direction in a slideway, the slide comprises two runners designed to engage with corresponding fixed sliding guides integral with the slideway, and two roller pads that slide on corresponding longitudinal sliding surfaces which are also integral with the slideway.

Abstract: A NC machine tool having a constitution in which a table (15, 115) for placing a work thereon and a spindle (14, 114) for setting a tool are relatively moved by three feed mechanisms (18-20, 118-120), for X-axis, for Y-axis, and for Z-axis, to carry out machining. A preload is applied to all the three feed mechanisms (18-20, 118-120), for X-axis, for Y-axis, and for Z-axis, using a rack-pinion (21, 22, 24, 25, 27, 28, 121, 122, 124, 125, 127, 128), and using two motors (16, 23, 29) for each axis to prevent backlash in the rack-pinion.