Abstract: Disclosed herein is means for directly coupling a main motor shaft to a working machine with a coupling head as an intermediate component. The machine unit assembled according to the present invention does not require rechecking of dimensional deviations after completion of assembly. The present invention is applicable to both upright type and lateral type machine units.

Abstract: Precision headstock (1) with controlled axis characterized by the possibility of automatic changes of the electrospindles (9-12). Thanks to this peculiarity the machine has the following advantages in comparison to similar products: high working speeds, different behavior and conformation of the chip, reduction of the cut forces, reduction of the working time, increase of the dimensional precision of the piece, possibility to work thin and vibration sensitive pieces.

Abstract: A motorized device including a first element, a second element, a third element, a fourth element, and a fifth element, wherein in this device the fifth element is constructed around an elongated piece perforated by an axial channel, which elongated piece is referred to as a sixth element, an axial channel of the sixth element is of an inner diameter greater than an outer diameter of the first element such that an entire longitudinal axis of the sixth element is able to be engaged along the first element, at least one of the first element and the sixth element is equipped with a seventh element, the function of the seventh element is to ensure a coupling in rotation of the first and the sixth elements.

Abstract: A tool attachable to a spindle of a machine tool by an automatic tool changer in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., and able to rotate at a rotational speed different from than that of the spindle of the machine tool without supply of electric power from the outside, provided with a machining tool for machining a workpiece, a motor connected with the machining tool and rotating the machining tool, and a generator to which rotary force is transmitted from the spindle of the machine tool and generating electric power to drive the motor, the shaft of the motor being arranged in an orientation different from the axial center of the spindle.

Abstract: A machine tool provided with a universal head free from restrictions on its swivel operation due to the presence of a power cable to a motor directly driving a spindle and consequently expanded in range of movement, provided with a ram serving as a support, a swivel member held by the ram to be able to swivel about a predetermined swivel axis, a tool mounting member held at the swivel member, rotatably holding at its front end a spindle to which a tool is mounted, and provided with a motor for driving the spindle, a generator provided at the swivel member and generating power used by the motor, and a power source provided at the ram and supplying power to the generator.

Abstract: A high speed surgical instrument is designed with a clutch that automatically locks a cutter which is easily assembled and disassembled without moving parts. The clutch includes a pin and U-shaped pin that compliments a configured groove section at the proximal end of a cutter that fits into a clutch mechanism in the drill or attachment. The cutter includes axially spaced and opposed grooves judiciously located and a flat end portion that allows easy ingress and egress for locking into the clutch mechanism. A square or multi-sided bore configuration of a journal type bearing made from a high temperature resistance polymer material allows the drill to operate at high speeds with a reduction in the diameter of the distal end of the cutter support.

Abstract: A spindlehead for tools is insertable into a tool disk with holders provided for such spindleheads. A spindle holds the shank of the tool in its chuck at its front end section, and is rotatably mounted by a spindle bearing in a spindlehead housing. A coolant feed extends at least in part in the spindlehead housing to convey coolant to the tool via at least one coolant channel and an internal coolant feed line in the spindle. A sealing device with a throttling point is separated form parts of a drainage channel. The sealing device has at least one sealing ring enclosing the spindle. The sealing ring is longitudinally movable in the spindlehead housing coaxially with the spindle axis. After longitudinal movement into a sealing position, the sealing ring separates the internal coolant feed line from the associated parts of the drainage channel up to a specifiable leakage amount. The accuracy of machining with the tool may be increased and the installation space available can be better used.

Abstract: A spindle device of a machine tool such as a milling machine and a machining center and a method of replacing a spindle, the spindle device wherein the housing of a spindle head (5) is divided into a front housing (23) and a rear housing (25), a spindle (7) is installed in the front housing (23) through front bearings (9), and a built-in motor rotor (43), a bearing case (33) through rear bearings (11), and a draw bar (51) for clamping a tool are installed on and in the spindle (7) to form a front housing unit (93); the method comprising the step of replacing the spindle (7) and the bearings by replacing the front housing unit (93), whereby, when the spindle device comes out of order, the spindle and bearings can be easily replaced in a short time and the stop time of the machine tool can be minimized at a site where the machine tool is used.

Abstract: A spindle head for a machine tool with a motor-spindle unit arranged on or integrated in the spindle head has a drive motor whose shaft is in the form of a spindle to hold tools, workpieces or workpiece blanks. The drive motor of the motor-spindle unit is able to be slid in the axial direction in the spindle housing, a compressible means being provided for impeding axial displacement of the drive motor into the spindle housing and by such compressible means the drive motor is held as far as a predetermined axial force level in its predetermined working position. Accordingly protection against collisions may be provided in a simple and economic manner also for spindle heads whose drive motor is integrated in the spindle housing.

Abstract: A working unit intended to be mounted on a movable machine operated tool support comprises a casing (10) which is attached to the tool support and which supports a pneumatic turbine motor (23, 24, 51) with a rotor (19), and a shank end mill type machining tool (22,21) with a cutter portion (21) extending out of the casing (10) and a shank portion (22) rotatively journalled in the casing (10), whereing the machining tool shank portion (22) is rigidly integrated with a turbine whell (24) to form the turbine rotor (19), a flow control valve (48) is arranged to deliver pressure air to the turbine motor (23, 24, 51), and the turbine rotor (19) is provided with a generator device for delivering a speed responsive output voltage to a control unit (55) which is arranged to make the flow control valve 848) adjust the power supply to the rotation motor (23, 24, 51) so as to maintain the rotation speed at a desired predetermined level.

Abstract: A tool attachable to a spindle of a machine tool by an automatic tool changer in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., and able to rotate at a rotational speed different from that of the spindle of the machine tool without supply of electric power from the outside, provided with a machining tool for machining a workpiece, a motor connected with the machining tool, and a generator to which rotary force is transmitted from the spindle of the machine tool and generating electric power to drive the motor, sealed bearings sealed with a lubricating oil are used for the bearings rotatably supporting a transmitting member for transmitting rotary force of the spindle to the generator and a drive shaft for transmitting rotary force generated by the motor to the machining tool.

Abstract: A collet assembly for a tool comprising a collet nut rotatably connectable to the tool; a collet operatively connectable to the collet nut; and a collet wrench movably connected with the tool and engageable with the collet nut for tightening and loosening the collet.

Abstract: A cutting tool feeding and rotating device for a machine tool includes a first mounting frame with a slide way extending in an axial direction. A tubular housing is mounted on and is slidable relative to the slide way in the axial direction. A spindle is received rotatably in the tubular housing and is driven by a drive member which is mounted on a second mounting frame. A servomotor has an output shaft which drives a drive transmission member which can convert a rotational force of the output shaft to a translation force that is exerted on the second mounting frame so as to force the tubular housing together with the second mounting frame to perform a linear displacement in the axial direction.

Abstract: The invention relates to a tool head with a spindle bearing arrangement The bearings (9, 10) of said arrangement rest with one of their bearing shells on a driven spindle (2) with a tool holding fixture (1). With their other bearing shell they interact with a housing (8) in such a manner that in at least one part (10) of the bearings (9, 10) the respective other bearing shell interacts with a sliding piece (11) which is slideable along the housing (8) in the one sliding direction and which locks the spindle (2) with the housing (8) in a locking position. In the other sliding direction, said sliding piece releases the spindle in a release position. The invention provides a universally useful tool head by the following configuration: The respective other bearing shell of the one part (10) of the bearings (9, 10) is at least partially enclosed by the sliding piece (11). Said sliding piece (11) is forced into the locking position with a predetermined contact force by a drive device.

Abstract: The invention pertains to a machine tool for processing workpieces with tools, wherein the machine tool has a spindle housing that contains a spindle shaft and accommodates at least one tool as well as a drive device that causes a rotational movement of the spindle shaft. The machine tool is characterized by the fact that the drive device (3) contains a hydraulically operated displacement machine or swash plate device.

Abstract: A machine (1) (42) wherein a frame (2) supports at least one operating head (34) (34a, 34b) via the interposition of an actuating device (4) for enabling the operating head (34) (34a, 34b) to move in relation to the frame (2) within a predetermined volume; and wherein the actuating device (4) is defined by two electric motors (14,24), the respective axes (6,21) of which are parallel to each other; and wherein a rotor (15) of one (14) of the two motors (14,24) is supported by the frame (2) and eccentrically supports a stator (23) of the other motor (24), a rotor (25) of which supports a straight guide member (31) in turn supporting a powered slide member (33) in turn supporting the operating head (34) (34a, 34b).

Abstract: A device in a tool holding assembly for axially moving a rotatable shaft on which is arranged at a first end of the shaft a device for performing work during rotation of the shaft includes an electric motor for rotating the shaft, and at least one bearing radially supporting the shaft and permitting movement of the shaft in the axial direction. The shaft has a second end forming a free end and an electromagnetic mechanism is arranged to affect or operate on the second end of the shaft to draw the shaft in the axial direction from the first end to the second end against the affect of pressure acting against the second end of the shaft in the opposite axial direction. A mechanism controls the electromagnetic mechanism to achieve axial movement of the shaft during rotation of the shaft.

Abstract: The invention relates to a spindle (9) for a machine tool, having a housing (12) to accommodate an electric motor (11) and a shaft (13) driven by the latter and having a tool holder for a tool (10) for machining workpieces, at least one data acquisition element (2) being provided to record operating and/or state data of the spindle (9), and at least one spindle-integrated data storage element (1) being provided to store the recorded data from the data acquisition element (2).

Abstract: An arbor clamping apparatus providing a steady way for clamping boring arbor and improves structure rigidity and boring accuracy for boring and milling machines. The milling arbor of the present invention is designed and characterized by two steps spindles and includes the first step spindle used mainly to clamp a boring arbor and to hold large cutting tools and fixtures, and the second step spindle designed principally to support and contain the boring arbor. With the first step spindle a clamping mechanism is established and includes a hydraulic cylinder, a piston and movable wedges. Hydraulic force is applied through the action of the piston to drive the wedges to move between the boring and milling arbors and hence the clamping for a boring arbor is achieved through the approaching action of the wedges.

Abstract: The present invention describes a head for machine tool on which an electro-spindle is mounted and in particular it describes a tilting head for machine tool on which an electro-spindle is mounted. In one embodiment the invention comprises a tilting head for machine tool comprising: one support element coupled to said tilting head; one electro-spindle; one cradle suitably shaped to incorporate and hold said electro-spindle pivoted on said support element so that it can turn around an axis perpendicular to the axis of said tilting head; said electro-spindle being set up to have mechanic, electric, pneumatic and hydraulic connections with said cradle; wherein said connections of said electro-spindle are of the releasable type so that said electro-spindle is interchangeable and can be rapidly coupled to and uncoupled from said cradle.

Abstract: A tool attachable to a spindle of a machine tool by an automatic tool changer in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., and able to rotate at a rotational speed different from that of the spindle of the machine tool without supply of electric power from the outside, provided with a machining tool for machining a workpiece, a motor connected with the machining tool, and a generator to which rotary force is transmitted from the spindle of the machine tool and generating electric power to drive the motor, sealed bearings sealed with a lubricating oil are used for the bearings rotatably supporting a transmitting member for transmitting rotary force of the spindle to the generator and a drive shaft for transmitting rotary force generated by the motor to the machining tool.

Abstract: A film cutter comprising an entry plate and a guard plate capable of receiving a film therebetween, wherein the guard plate is in communication with a housing plate having a lower surface and an upper surface, and wherein the housing plate lower surface has a retaining groove capable of retaining a cutting belt. The housing plate upper surface has pushing member grooves capable of receiving pushing members, the pushing member grooves having ramps. The film cutter further includes a cutting belt having cutting members, wherein the cutting belt is retained in the retaining groove, and wherein the cutting members do not extend past the guard plate when the film cutter is in a non-activated state.

Abstract: The invention, relating to an internal, active, compensatory and method and device for the rotational main-shaft of a cutting tool with axial bias-and-swing, mainly applies an active technique to a gas-floating main-shaft to thereby control its bias-and-swing. A sensor at the exterior of the main-shaft directly measures the axial bias-and-swing of the cutting tool. Taking the measured data as feedback signals, the cutting point of the cutting tool is maintained at an axial positioning accuracy that is predetermined. Further, the invention is arranged with an electromagnetic controlling module to the mandrel's tail end at the interior of the main-shaft for taking non-contacting magnetic force to finely tune the axial position of the mandrel, such that an active compensatory function of the axial position of the cutting point of a cutting tool in action is achieved.

Abstract: A bearing device for a threaded spindle has a bearing housing with at least one receptacle configured to receive a bearing part of the threaded spindle. The at least one receptacle is a clamping bushing securing the bearing part by electromechanical elements or fluid-operated elements. The clamping bushing has a wall that is elastically deformable by a pressure medium. The wall and the bearing housing define an annular chamber configured to receive the pressure medium. A control unit is provided to control the pressure of the pressure medium and thus the clamping action of the clamping bushing.

Abstract: A spindle device equipped with a combined externally pressurized gas-magnetic bearing assembly, and a machining apparatus utilizing the spindle device. The spindle device is capable of accomplishing a high speed rotation with high rotational precision and includes a main shaft (4) rotatably supported by the combined bearing assembly (6 to 9), an electric current detecting device (15 to 18) disposed in a spindle controller (3) for detecting a current supplied to electromagnets of the combined bearing assembly (6 to 9). Also provided is a machining status determining device (19) for determining the machining status in reference to the current detected by the current detecting device (15 to 18). The machining status may be an indication of the extent to which a machining tool is impaired.

Abstract: Arrangement for delivering coolant fluid to the rotating part (1,3) of a tool spindle intended to support a tool at one end. It is distinguished in that the end of the rotating part (1,3) that is opposite the tool is accommodated in a unit (4) that is stationary in relation to the rotating part (1,3), that the rotating part has an axial bore (6) of the rotating part (1,3), that a gap sealing separates the rotating part (1,3) from the stationary unit (4) adjacent to the inlet thereby forming a dynamic bearing during the rotation of the rotating part due to leakage of the coolant fluid through the gap sealing.

Abstract: The invention relates to a spindlehead for tools which may be inserted into a tool disk with holders provided for this purpose and whose chucking means for spindle (10) holding the shank of the tool is rotatably mounted in a second section (26) adjacent to the first end section (12) receiving the tool shank, with a spindle bearing (14), and with a coolant feed (34) guided at least in part in the spindlehead housing (16), coolant transfer for the respective tool being effected by way of at least one coolant channel (40, 42, 44) which applies an internal coolant feed (34) for the respective tool by way of a sealing device (52) with throttling point separated from parts of a drainage channel (46, 48, 50) and the sealing device (52) having at least one seal (54, 56) which encloses the spindle (10).

Abstract: A tool-driving device (1), which is particularly provided for machine tools, has an internal drive (9), which serves to drive a tool. Also provided is a control device (36), which detects the movement of the tool-driving device (1) and correspondingly controls its drive (9). The tool-driving device (1) can thus be controlled independently of the other tool-machine controls.

Abstract: A spindle device for machine tools that can eliminate the need for laborious air bleeding work and labor-demanding fitting/removing work for maintenance. The spindle device for machine tools includes a drawbar that is axially movably inserted into an axial hole of a tool spindle body. The drawbar serves to bias a tool in a clamping direction. An unclamping cylinder mechanism is provided in a rear of the tool spindle and serves to move the drawbar in an unclamping direction. The unclamping cylinder mechanism has a cylinder block fixed to a rear end wall of the tool spindle body and includes a plurality of bolts. A relay oil passage allows a hydraulic passage in the tool spindle body and a hydraulic passage in the cylinder block to communicate with each other.

Abstract: An operating unit for a transfer tool machine comprises a turret head having a rotary plate, a plurality of tool holding devices arranged on the rotary plate, a supporting arm supporting the turret head on the tool machine framework and a mandrel which is driven by a reducing driving device also mounted on the machine tool framework.

Abstract: A machine tool includes a tool spindle rotatably mounted in a housing. A tool member is disposed in a front spindle segment of the spindle and is releasably clamped by a clamping member. An actuating member is mounted in and is axially movable relative to the spindle to actuate the clamping member. First and second anti-friction bearings are interposed between the housing and the spindle and have different outer diameters. A preload actuating member is disposed to force the second anti-friction bearing in the axial direction to take up the slack in a non-actuated state of the second anti-friction bearing when the spindle is running in a higher speed, thereby resuming the anti-friction function of the second anti-friction bearing when running the tool spindle at a lower speed is intended.

Abstract: A rotary drive adapted to perform a speed of rotation switching of a tool holding device, comprising an output drive shaft bearing the tool holding device, said output drive shaft being able to be moved into first and second axial positions by means of a setting drive. The output drive shaft is coupled in the first axial position with a power driven first drive gear wheel and in the second axial position with a concentric tubular shaft, which is adapted to be driven by a power driven second drive gear wheel by way of a worm drive.

Abstract: A spindle assembly, with improved belt drive, is suitable for a multi-axis machining cell providing tool movements along predetermined axes of motion, such as the X-, Y- and Z-axes. Plural machining spindles, each provided with a driven pulley, are mounted to a headstock of a machining cell. A spindle, drive motor is also mounted to the headstock and is provided with a drive pulley. A drive belt is trained, preferably by serpentine wrap, over the drive pulley and subsets of driven pulleys, and transmits rotational motion from the drive pulley to the driven pulleys. Preferably, at least one set of drive pulley and driven pulleys is constituted by herringbone sprockets.

Abstract: A rotary drive adapted to perform a speed of rotation switching of a tool holding device, comprising an output drive shaft bearing the tool holding device, said output drive shaft being able to be moved into first and second axial positions by means of a setting drive. The output drive shaft is coupled in the first axial position with a power driven first drive gear wheel and in the second axial position with a concentric tubular shaft, which is adapted to be driven by a power driven second drive gear wheel by way of a worm drive.

Abstract: A burr tool for use with heat shrink tool holders and fittings. The tool comprises a shank fabricated from a heavy metal material. Secured to the shank through a high temperature deposition process is an abrasive material. The shank is constructed out of a heavy metal such that the shank maintains a selected diameter within a prescribed range despite being heated to a temperature necessary for deposition of the abrasive material thereupon. As such, the shank maintains tolerances necessary for the use thereof with heat shrink tool holders and fittings.

Abstract: Arrangement for a tool spindle with a pulling rod (3) axially displaceable in the spindle axle (1) for firmly attaching a tool at the spindle of the tool whereby the end of the pulling rod (3) that is opposite to the tool is accommodated in a stationary unit (4), the rotating part (1, 3) is provided with a piston (11) movably displaceable in a cylinder chamber (13) arranged in the spindle axle (1), the pulling rod (3) has at least one first axial bore (12a) opening into the cylinder chamber on one side of the piston (11) and at least one second (12b) axial bore opening into the cylinder chamber on the other side of the piston (11), the stationary unit (4) is provided with an inlet (16) in communication with the first bore (12a) and an inlet (14) in communication with the second bore (12 b).

Abstract: Arrangement for a tool spindle with a moveable pulling rod (3) axially displaceable in the spindle axle (1) for firmly attaching the tool. The pulling rod is surrounded by at least one spool (9) that is stationary in relation to the axial displacement of the pulling rod (3) which gives a specific current flow that differs depending on the axial position of the pulling rod (3) in the spool (9), whereby the rotating part (1, 3) of the tool spindle in the form of the spindle axle (1) or the end part (10) of the pulling rod (3) that projects out from this, is accommodated in a stationary unit (4) that is at the end of the tool spindle opposite to the tool and which has an axial bore (6), that the stationary unit (4) is provided with an inlet for introducing coolant fluid under pressure to the bore (6) and that a gap sealing is arranged between the rotating part (1, 3) and the stationary unit (4) adjacent to the inlet to allow leakage of fluid through the gap sealing.

Abstract: A quill spindle includes a quill assembly within which a spindle assembly is rotationally mounted. The quill assembly includes a coolant flow path, and the spindle assembly includes a plurality of coolant flow paths. The quill assembly flow path and one of the plurality of spindle assembly flow paths provide cooling to bearings that allow the rotation of the spindle assembly within the quill assembly. Another of the plurality of coolant flow paths within the spindle assembly provides cooling flow to a cutting tool installed on an end of the quill spindle.

Abstract: Disclosed is a high speed-perforating apparatus 1 comprising a rotor 17 into and through which a cylindrical rotary shaft 11 is integrally inserted, a stator 18 disposed around the outer periphery of the rotor 17 and a core bit 13 which is directly connected to the head end portion of the rotary shaft. A bit 15 having an outer diameter of up to 40 mm and a cutting edge thickness of less than 2 mm is used for the core bit 13. Perforation is carried out by the core bit 13 which is rotated at a high speed of 4000 rpm or more by a direct motor 2 comprising the rotor 17 and the stator 18. A perforating time can be greatly shortened by rotating the core bit at high speed.

Abstract: In a drive spindle an electric motor has an output shaft which defines a spindle able to receive an associated tool and associated with an attachment device movable between a position in which it locks the tool on the spindle and a release position; the operative conditions both of the spindle and of the attachment device being detectable by means of a single monitoring optical sensor.

Abstract: A collet assembly for a tool comprising a collet nut rotatably connectable to the tool; a collet operatively connectable to the collet nut; and a collet wrench movably connected with the tool and engageable with the collet nut for tightening and loosening the collet.

Abstract: A tool holder of the hollow taper shank in a tool machine is disclosed. A resisting block supported by a spring is received within a tool holder. As the short knife is disposed within the tool holder, the elastic force of the spring can be overcome. At first, a plurality of steel balls and a resisting block are pushed inversely until the front edge of an wider portion of the short knife passes through the steel ball. Now, the spring will release the energy from elastic deformation so as to enforce the resisting block to move forwards and outwards so as to return to the original position. Thereby, the knife can be firmly secured.

Abstract: A tool for milling and drilling where the rotating tool has a bearing surface provided to cooperate with another bearing surface to take up radial cutting forces. The two surfaces are essentially axially non-slidable when the cutting tool is engaging the workpiece.

Abstract: A tool for milling and drilling where the rotating tool has a bearing surface provided to cooperate with another bearing surface to take up radial cutting forces. The two surfaces are mutually separated by a fluid and are essentially axially non-slidable when the cutting tool is engaging the workpiece.

Abstract: A portable boring-welding machine, in which the rotation of the tool shaft or the torch shaft and, respectively, the axial movement of the tool shaft or torch shaft in both directions are driven by a combination of only two independent motors, which can be activated from the machine control unit. The motors are housed in a box which is integral with the machine structure and has a machine carry-handle. At least the motor which drives the rotation of the tool and torch shafts is of the direct current type and is subject to the action of means which adjust its speed and operating stroke, said means being positioned, respectively, on the control unit control panel and at end of stroke means, intercepted by actuators which follow the axial movement of the tool and torch shafts.

Abstract: An arrangement relating to high-speed tools includes a drive unit having a high-speed spindle, a drive-unit connected adapter that has a supportive part, and a tool that includes the cutting head. The tool is provided with a bearing surface in the close proximity of the cutting head, and the supportive part has a bearing which takes up cutting forces acting radially on the tool and which coacts with the tool-carried bearing surface.

Abstract: A spindle capable of operation at 200,000 revolutions per minute (RPM) with a reciprocating shaft design to minimize the moving mass. The spindle has a ceramic spindle shaft to decrease the moving mass and increase the shaft stiffness for better dynamic stability. The spindle employs a built-in linear motor to provide direct drilling motion to move the shaft along the axis, and a permanent magnet DC brushless motor to rotate the spindle shaft. The linear motor is coupled to the shaft by a combination of an air bearing and a magnetic thrust bearing to reduce the size of the thrust area for better dynamic stability and reduction in stresses of material. A double gripping centrifugal chuck is mounted in the hollow ceramic shaft, and reduces drill bit runout.

Abstract: The invention concerns the work units for automatic machine tools in which a spindle (5) moves in translation and rotates with respect to a work axis (Z). More particularly in these units, in order to obtain the rotation/translation of the spindle, the latter is housed in a sleeve (3) that slides along the work axis (Z), with respect to which it is however free to turn.

Abstract: An automatic spindle arresting device for hand tools, especially for drills, drill screwdrivers, angle grinders and the like, with a latching part (50; 120), which is connected to the spindle (20) or the housing (10) so that there cannot be any mutual rotation, and which can be coupled in both direction of rotation of the spindle (20) with at least one arresting part (40; 140), which is connected with the housing (10) or the spindle (20) so that there cannot be any mutual rotation, and with a driving part (34; 110), which is disposed equiaxially to the spindle (20) and has unlocking elements, by means of which the latching part (50; 120) and the arresting part (40; 140) can be uncoupled, is characterized in that the unlocking elements are one or more control paths (38; 116), which are disposed at the driving part (34; 110) and at which one or more control cams (54; 124) of the latching part (50; 120) slide due to a rotational motion of the driving part (34; 110) in such a manner, that the latching part (50; 1

Abstract: An interrupted cut pacifier (ICP) for machine tool spindle drive gears. This device forces constant engagement of the spindle drive gears during interrupted cut operations immediately causing the gears to stop banging into one another. Activation of the device causes contact shoes to grip the rotating machine spindle. Machine wear is minimized and production is increased.