Abstract: A milling and deep drilling machine operated by a control unit is provided, which commands the action of a robotic arm in a coordinated and automatic manner, being responsible for milling and deep drilling actions, and at least one technical tool storage cabinet. The robotic arm having a mobile structure, with a base structure along which a driving unit is moved, over sliding rails. The configuration of the milling mode in the machine is achieved by coupling a milling tool to the drive unit.

Abstract: A tool adapter includes an adaptor body having a connection portion structured to be attached to a machine tool and a holder portion disposed opposite the connection portion and a tool receiver structured to receive and couple a portion of a rotary cutting tool therein. The tool receiver is mounted in the holder portion so as to be rotatable to a limited extent. The tool receiver is mounted in the holder so as to be elastically resilient in both the axial and circumferential directions.

Abstract: A power drill has a rotatable spindle extending from a power-unit housing, a chuck body rotationally fixed to the spindle, a jaw guide carried on the chuck body and rotatable relative thereto about the axis, jaws carried in the chuck body, and a pusher element rotatable about the axis in the chuck body and fixed to and bearing axially on the jaws. Screwthreads between the pusher element and the spindle is effective to move the jaws radially on rotation of the spindle about the axis relative to the guide. A coupling sleeve rotationally fixed to the jaw guide is movable between a tightening position rotationally fixed to the housing for movement of the jaws by the pusher element on rotation of the spindle and a drilling position rotationally fixed to the spindle and rotatable relative to the guide for joint rotation of the guide, jaws, and spindle.

Abstract: A radial tapping attachment for a motor-driven tool includes an enclosed, box-shaped housing, a main shaft assembly adapted to retain a tap, a drive mechanism rotatably driven by the tool and a guide member assembly for supporting an object to be tapped. The main shaft assembly includes a main shaft rotatably coupled to the housing by a pair of bearings, a pair of spaced apart discs fixedly mounted on the main shaft, and a pair of axially mounted compression springs that allow for slight, bi-directional, axial displacement of the main shaft relative to the housing. The drive mechanism includes a drive shaft rotatably coupled to the housing at an approximate right angle relative to the main shaft and a drive wheel mounted on the drive shaft that selectively engages the pair of discs to rotate the main shaft in either direction when an axial force is applied to the tap.

Abstract: A drill chuck has a rotatable chuck body, a tightening sleeve axially fixed but rotatable on the chuck body, a plurality of jaws on the body and radially displaceable between inner and outer end positions, and a screwthread formation for radially displacing the jaws between their end positions on relative rotation of the body and sleeve. An inner element rotationally fixed on the chuck body has an elliptical outer surface generally centered on the axis and bearing on a flexible coupling ring having an annular array or radially outwardly projecting coupling teeth. First and second rings each have an annular array of radially inwardly projecting teeth meshing with the coupling teeth. The first ring is fixed and second ring is rotatable relative to the chuck body adjacent the first ring. The second-ring array of teeth has a number of teeth different from that of the first-ring array of teeth.

Abstract: The invention relates to a tool system that can be coupled to the drive shaft of a lathe. Said system comprises a tool holding fixture which can be connected to the lathe, and a took which is stored in a polygonal recess in the tool holding fixture so as to be torsion-proof yet removable. This tool has a tool shank and at least one functional section extending coaxially therefrom. The tool rests axially on a centering area in the polygonal recess, and rests radially on several identical locking elements. These are arranged in radial cavities in the tool holding fixture, at equal angular distances and at an axial distance from the centering area. This enables centering of the tool in the tool holding fixture.

Abstract: A drill press has a drive motor with output shaft that drives a chuck through a rotatable and vertically displaceable quill and a first drive coupling which includes a pair of pulleys, such as cone pulleys, and a belt extended between the cone pulleys. A rotary power take-off in the form of an additional pair of pulleys and a drive belt extracts rotary power from the drive coupling between the motor and the chuck and transfers it to an oscillatory motion device. The device includes a worm and worm gear and an eccentrically mounted arm which convert rotary motion from the rotary power take-off into a reciprocating linear motion. A lever is pivotally mounted to the device with one end engaged with the quill and a remaining, opposing end coupled with the arm. Reciprocation of the arm causes reciprocation of the lever which causes reciprocation of the quill, chuck and any tool held in the chuck. The arm is releasably engaged with and is coupled with the lever through a detent block.

Abstract: Each of the two alternately actualable clutches of a threading shaft includes a clutch disc keyed to the shaft, and positioned between two annular members. One of the members is rotated coaxially of the shaft by a driving gear, and the other is movable axially by the ball detents of a camming mechanism in one direction to grip the clutch disc frictionally between the annular members thereby to transmit the rotation of said driving gear to the shaft, and in the opposite direction to disengage the driving gear from the shaft.

Abstract: A tap holder for detachably securing a tool to a machine tool including a main portion having a shank which is to be secured to a main shaft of the machine tool, a quick change portion having a float shaft which is inserted into a hole formed in the main portion and a quick change mechanism including a clamp collar, a first coiled spring for pressing the clamp collar toward the main portion, steel balls arranged in holes formed in the float shaft, a supporting ring slidably inserted into the float shaft and a second coiled spring for pressing the supporting ring toward a tool, and a tool supporting portion including a driven shaft whose rear end has a recess formed therein and is inserted into the float shaft and a torque control mechanism. By moving the clamp collar toward the main portion against the resilient force of the first coiled spring, the engagement between the steel balls and the recess of the driven shaft is released and the tool holding portion is removed from the quick change portion.

Abstract: A tap holder e.g. for threading taps, has a drive body (1) intended for connecting to the chuck of a drive motor. The driving power is transferred by a torque-limiting device (2, 9, 11) to a clamping body (8) intended to clamp the shank (12) of the threading tap. By the clamping body having outer (6) and inner (5) jaws with an intermediate elastic member (7), tool shanks of different dimensions may be accommodated by the clamping body.

Abstract: A drilling machine operable by a single operator to tap into a pipeline includes an elongated boring bar to which a number of different tools such as drills and hole saws may be removably attached. The boring bar is positioned within a body tube allowing rotation of the boring bar relative to the body tube. The body tube is positioned within an internally threaded feed tube such that as the feed tube is rotated, the boring bar is advanced. Manual or automatic driving equipment is secured to the boring bar to rotate the tool. A clutch mechanically couples the rotation of the driving equipment to the feed tube to move the tool into the pipeline at a controlled rate. The clutch includes a feed nut threadably secured to the feed tube. Adjacent the feed nut is a clutch member slideably secured to the feed tube. A biasing member such as a wave spring is position between the feed nut and the clutch member.

Abstract: A rotary tool holder for use with an automatic or semi-automatic tool grinding machine is disclosed. The tool holder includes a rotating collet and spindle. The spindle is driven through a torque limiting coupling for protection against lock up. A shaft is connected to the spindle through the torque limiting coupling which includes a disc spring made up of a plurality of concave-convex shaped discs in frictional engagement with the shaft and the spindle. The disc spring will slip at a given torque during lock up. A fluid responsive collet actuator is provided for automatic opening and closing of the collet.

Abstract: An attachment for a vertical milling machine or the like provides a drive arrangement which provides for a selective high-torque drive connection, a low-torque yielding drive connection, or a complete disconnect.

Abstract: A power tool includes a turret rotatably mounted on a hub, a first shaft rotatably mounted in the hub and a second shaft mounted for rotation in the turret and for aligned rotating engagement with the first shaft in the hub. First and second members, including a resilient member, are provided in the first shaft for engaging the second shaft.

Abstract: A critical torque detector is disclosed made up of a rotating input member, an output member supporting a drill and connected in a "flexible driving connection" with the input rotating member, and means for detecting difference in rotational speed between the input and output members due to a greater torsional resistance encountered by the drill during its operation than the critical torque predetermined for a specific drill. The input and output members are drivingly connected, as by a coil spring, magnetic repelling forces and so on, so as to rotate conjointly whenever a torsional resistance or a torque encountered by a running drill is lower than the predetermined value, but they are not always rigidly connected. Upon occurrence of greater torque imposed on the drill, the output member will be permitted to delay in rotation as compared to the input member. Such difference in rotational speed can be taken out mechanically or electromagnetically as a signal to detect occurrence of the critical torque.

Abstract: A critical torque detector is disclosed made up of a rotating input member, an output member supporting a drill and connected in a "flexible driving connection" with the input rotating member, and means for detecting difference in rotational speed between the input and output members due to a greater torsional resistance encountered by the drill during its operation than the critical torque predetermined for a specific drill. The input and output members are drivingly connected, as by a coil spring, magnetic repelling forces and so on, so as to rotate conjointly whenever a torsional resistance or a torque encountered by a running drill is lower than the predetermined value, but they are not always rigidly connected. Upon occurrence of greater torque imposed on the drill, the output member will be permitted to delay in rotation as compared to the input member. Such difference in rotational speed can be taken out mechanically or electromagnetically as a signal to detect occurrence of the critical torque.

Abstract: A critical torque detector is disclosed made up of a rotating input member, an output member supporting a drill and connected in a "flexible driving connection" with the input rotating member, and means for detecting difference in rotational speed between the input and output members due to a greater torsional resistance encountered by the drill during its operation than the critical torque predetermined for a specific drill. The input and output members are drivingly connected, as by a coil spring, magnetic repelling forces and so on, so as to rotate conjointly whenever a torsional resistance or a torque encountered by a running drill is lower than the predetermined value, but they are not always rigidly connected. Upon occurrence of greater torque imposed on the drill, the output member will be permitted to delay in rotation as compared to the input member. Such difference in rotational speed can be taken out mechanically or electromagnetically as a signal to detect occurrence of the critical torque.

Abstract: The present invention relates to an improvement in a mechanism wherein a flywheel which is idly mounted on a spindle of a machining center is easily and speedily connected with or detached from the spindle by a clutch which is fitted on the spindle adjacent to the flywheel for promoting the cutting efficiency by providing spindle inertia of two kinds; one kind for heavy cutting and another for light cutting respectively.

Abstract: Means for controlling the advance of a thread forming member include a unidirectionally driven constant speed spindle, with the spindle mounting a thread forming member. A lead screw and a nut threadedly mounted thereon have a thread in which the helix angle is sufficiently high that the nut is freely rotatable relative to the lead screw in response to axial movement of the lead screw. The lead screw or the nut is attached to the spindle. There are means for controlling rotation of the other of these two members independently of the member attached to the spindle and during unidirectional constant speed rotation of the spindle to thereby control axial movement of the spindle.

Abstract: Manually operable tool means includes a frame formed at one side with an apertured work piece holder, and at an opposite side with an internally threaded shaft housing in which is adjustably mounted tool supporting means and a tool element. The tool element in the form of a drill, for example, while engaged with a work piece supported in the holder is turned by means of a spring loaded handle. The tool supporting means consists in a tubular adapter sleeve which is in threaded engagement with the internally threaded housing, and which is provided with a pressure-transmitting collar against which the handle engages. The tool shaft is rotatably mounted in the adapter sleeve and has the tool element detachably secured at one end. A range of pressures may be exerted through the tool element while cutting by varying the angular position of the handle against the collar as the tool is manually turned.

Abstract: A tap holder which is particularly adapted for use on a numerical-controlled machine is the subject matter herein. The tap holder includes an elongated shaft, which has a conventional tap collet on one end thereof. A tap holder body is rotatably and axially movably mounted on the shaft. The body is particularly adapted for connection to a tool holder of a numerically-controlled machine. A collar is mounted on the shaft. A pair of balanced springs is mounted on the shaft on opposed sides of the collar. Both springs are connected to the body to allow relative axial movement between the shaft and the body. A limited drive torque assembly drivingly connects the shaft to the body to drive the shaft at a torque which does not exceed a predetermined maximum amount.

Abstract: Tapper comprising a rotatable tapper main body, a positive rotation transmitting element and a reverse rotation transmitting element disposed in the main body, a holder member disposed in a lower portion of the main body, a driven shaft for holding a tap supported by the holder member and rotatable in positive and reverse directions, and a clutch ring for switching the direction of rotation mounted on the driven shaft. The axial displacement of the driven shaft brings the clutch ring into engagement with the positive rotation transmitting element or the reverse rotation transmitting element selectively to rotate the driven shaft in positive or reverse direction. Each of the clutch and the reverse rotation transmitting element is axially movably supported by a spring for absorbing an axial impact load to be exerted on the driven shaft when the direction of rotation is switched.