Abstract: A power tool includes a motor, a lighting power source, and a housing assembly defining an axis that supports the motor and the lighting power source. The power tool also includes a lighting assembly with a light and an energy line that transmits energy to the light to thereby provide illumination. The light and the lighting power source are disposed in spaced relationship from each other relative to the axis. Furthermore, the power tool includes a light holder supported by the housing assembly. The light holder supports the light and a portion of the energy line such that an end of the energy line unsupportedly extends beyond the light holder and electrically couples to the lighting power source.

Abstract: A locking assembly for the spindle of a tool includes a locking member, a biasing member interconnected with the locking member, and a collar surrounding a portion of the spindle. The spindle includes a spindle slot that receives the locking member to lock the spindle with respect to the tool housing. The collar may be rotated into an unlocked position in which the biasing member holds the locking member out of engagement with the spindle slot. The collar may also be rotated into a locked position in which a cam surface in the collar acts on the biasing member to apply a biasing force on the locking member toward engagement with the spindle slot. The biasing member may deflect to accommodate rotation of the collar into the locked position with the spindle slot not aligned with the locking member.

Abstract: A power driver may include a housing, a tool chuck and a sleeve. The tool chuck may have a chuck body mounted for rotation on the housing and supporting threadless chuck jaws, and a chuck drive shaft mounted for rotation on the chuck body. The sleeve may be mounted on the tool chuck for adjustment into a DRILL DRIVE MODE to rotationally lock together the chuck body and the chuck drive shaft, and a CHUCK MODE to rotationally lock together the chuck body and the housing.

Abstract: An electrical combination including a driver drill capable of producing an average current draw of approximately 20-amps, a circular saw capable of producing an average current draw of approximately 20-amps, and a power tool battery pack operable to supply power to the driver drill and to the circular saw, the battery pack including a plurality of battery cells, the plurality of battery cells each having a lithium-based chemistry.

Abstract: A drilling apparatus capable of having a minimal axial length to permit its use within limited confines. The drilling apparatus includes a housing with a housing bore and a first housing end, a spindle rotatably supported within the housing bore, bearing elements within the housing bore and surrounding the spindle to rotatably support the spindle within the housing, and a drive unit for rotating the spindle. The spindle is configured to secure a shank of a drill bit at a first end thereof exposed at the first housing end, and the drive unit is transversely offset from an axis of rotation of the spindle.

Abstract: A reciprocating pneumatically driven drill motor housing for use in repetitive machining operations that uses industry standard motors, chucks and multiple spindle heads. The invention allows the user to limit set up time and obviates the need for fabricating special tooling. The unit is easily mounted on any type of fixture.

Abstract: A drill chuck has a chuck body having a forwardly open large-diameter threaded bore centered on an axis and a rearwardly open bore also centered on the axis and of small diameter. A power-unit spindle end is threaded into the small-diameter bore and projects axially forward into the large-diameter bore. A sleeve assembly axially fixed but rotatable on the chuck body is formed centered on the axis with a plurality of axially extending, angularly spaced, and forwardly open angled guides slidably receiving jaws. A coupling body has a large-diameter rear end threaded into the forwardly open large-diameter bore of the chuck body and a front end fitted to and angularly coupled to the jaws so that rotation of the sleeve assembly, jaws, and coupling body relative to the chuck body axially shifts the jaws.

Abstract: A power tool for drilling a hole in a workpiece made of wood or a wood material. The power tool generally includes a tool housing defining a handle and a motor contained within the tool housing that includes an output shaft that spins about a motor axis. A gear housing is connected to the tool housing. An output spindle is supported for rotation about a spindle axis in the gear housing. The spindle axis is disposed about ninety degrees from the motor axis. A gear portion on the output shaft is engaged to a gear portion on the output spindle. The motor and the gear portions are configured to rotate the output spindle at a speed in range from about five thousand revolutions per minute to about twenty-five thousand revolutions per minute. A cutting member is connected to the output spindle. The cutting member includes fluted cutting blades. A carriage assembly includes a base member and a head member connected by a first post having a first compliant member and a second post.

Abstract: A tool chuck may include a chuck body defining a longitudinal axis. A sleeve may be mounted on the chuck body and axially fixed relative to the chuck body. A clutch part may be provided on the sleeve. The clutch part may interact with a cooperating clutch part mounted on the power driver housing. The cooperating clutch part may be mounted on the power driver housing for movement between a first axial position in which the chuck body is rotatable together with the sleeve, and a second axial position in which the chuck body is rotatable relative to the sleeve to actuate the tool chuck. The chuck body may be rotatable in a first direction to actuate the tool chuck up to a first torque threshold, and rotatable in a second direction to actuate the tool chuck up to a second, different torque threshold.

Abstract: A power driver may include a motor that rotates upon receiving an input current. A tool chuck may have chuck jaws to hold an accessory. The tool chuck may be coupled to the motor. A power take off mechanism may be connected between the motor and the tool chuck. The power take off mechanism may be adjustable into a CHUCK MODE to one of open and close the chuck jaws while the motor rotates. An electronic clutch may interrupt the input current to the motor if the power take off mechanism is in the CHUCK MODE and if the input current exceeds a trip value.

Abstract: A automated chuck is provided with at least three user selectable operating modes, thereby enabling different functions to be performed during tightening and loosening of the chuck. In one exemplary implementation, the different user selectable operating modes of the chuck may be used to actuate a motor direction switch of the drill.

Abstract: The invention involves a deburring tool for deburring drilled holes, especially simple holes or through-holes, and includes a tool holder (1) with a tool shaft (2) and a anterior part (3), in which an extending recess (19) is placed transversally to the longitude of the tool holder (14), in which recess at least one cutting knife (14, 15) is placed, on whose underside a latch recess (26) is designed, in which a rocker-knife coupling (17, 18) engages, which has a torque-proof connection to the front side of a rocker (7) that is pivotable and located in the tool shaft (2), which rocker is pre-stressed with a spring (6), by which at least one cutting knife (14, 15) is always held under spring tension to the tool shaft (2), characterized by the fact that the rocker-knife coupling (17, 18), in the form of a rigid rocker stud or an elastic rocker spring, engages in the longitude of the tool holder (1) under spring tension in the associated latch recess (26) at the base of at least one cutting knife (14, 15).

Abstract: A power driver may include a housing, a tool chuck and a power take off mechanism. The tool chuck may have an input shaft mounted for rotation on the housing. The input shaft may support threaded chuck jaws. A chuck actuating shaft may be mounted for rotation on the input shaft. The chuck actuating shaft may be screw coupled to the threaded chuck jaws. The power take off mechanism may be connected to the tool chuck. The power take off mechanism may be adjustable into a DRILL DRIVE MODE to rotationally drive the input shaft and the chuck actuating shaft together as a unit, and a CHUCK MODE to rotationally drive the chuck actuating shaft relative to the input shaft. The power take off mechanism may be internal of the housing. The power take off mechanism in the CHUCK MODE may rotationally fix the input shaft to the housing.

Abstract: An exemplary machine tool includes a main body, a transmission, a spindle, a fixture, a cutter, a driving device, and a camera. The transmission is coupled to the main body. The spindle is coupled to the transmission. The fixture is coupled to the spindle and holds a workpiece. The cutter and the driving device are coupled to the main body. The cutter is opposite to the spindle and configured for processing the workpiece. The camera is coupled to the driving device and is configured for capturing images of the cutter and the workpiece.

Abstract: The present invention is a coring unit adapted to be engaged to an articulated arm, to reduce the labor necessary for on-site coring of sewage and water pipes. The coring unit includes a frame containing the components of the unit, which include a coring bit, a coring bit motor, a traverse mechanism, and a stabilizer for allowing ready orientation of the coring unit with respect to an object being cored. The unit may also be provided with a traverse motor for driving the coring bit into an object being cored, and for withdrawing the coring bit once a core has been formed. The coring unit may additionally be adapted to allow for remote operation of the coring unit.

Abstract: A detachably mountable hand drill tool bit holder and static tool presenting apparatus holds a plurality of bits for use with a hand drill tool. The apparatus comprises a horizontally oriented oblong oval shaped receptacle with two parallel sides forming an aperture for receiving and frictionally engaging tool bits. The apparatus is made of a resilient rubber or rubber-like material. The bottom is shaped to be inserted and frictionally engaged by a slot formed in the hand drill tool. The top of the apparatus allows ends of tool bits to extend outward so that each bit is presented and can be easily grabbed for use. Bits are returned to the holder by inserting anywhere there is unoccupied space in the holder by forcing the bit into the space. The size of the holder's oblong oval shaped receptacle is selected to exhibit a width between the two parallel sides that is significantly less than the diameter of the smallest bit.

Abstract: A power driver may include a housing, a tool chuck and a power take off mechanism. The tool chuck may have an input shaft mounted for rotation on the housing. The input shaft may support chuck jaws. A chuck actuating shaft may be mounted for rotation on the input shaft. The power take off mechanism may be connected to the tool chuck. The power take off mechanism may be adjustable into a DRILL DRIVE MODE to rotationally drive the input shaft and the chuck actuating shaft together as a unit, and a CHUCK MODE to rotationally drive the chuck actuating shaft relative to the input shaft. The power take off mechanism may be internal of the housing. The power take off mechanism in the CHUCK MODE may rotationally fix the input shaft to the housing.

Abstract: A power driver may include a housing, a tool chuck and a power take off mechanism. The tool chuck may have an input shaft mounted for rotation on the housing. The input shaft may support chuck jaws. A chuck actuating shaft may be mounted for rotation on the input shaft. The power take off mechanism may be connected to the tool chuck. The power take off mechanism may be adjustable into a DRILL DRIVE MODE to rotationally drive the input shaft and the chuck actuating shaft together as a unit, and a CHUCK MODE to use the transmission shaft to rotationally drive the chuck actuating shaft relative to the input shaft. The transmission shaft may be a gear shaft axially aligned with the input shaft, or a tertiary shaft axially offset from the input shaft.

Abstract: An automatic, universal, multi-purpose ground stand to securely affix an umbrella, or any like device, into any malleable surface such as sand, grass, gravel or dirt. The device is intended to accommodate any size or shape of commercially available beach or sun umbrellas. This device also contemplates the securement of other devices such as fishing poles. The device is comprised, primarily, of a main tube with a helical auger screw bit and a DC electric motor to turn the screw. A user of said device would extend the helical auger screw bit, engage the DC electric motor, and allow the action of the DC electric motor to secure the helical auger screw into a malleable surface.

Abstract: A milling head has a body, a holding device, a driving axle, a spraying device and a tool adaptor. The body has a base, a rear cover, a front cover, a bearing seat and a middle liner ring. The holding device is connected to the body and has a linking arm, a mounting jacket, a bottom cap, a positioning shaft and a locating spring. The driving axle is rotatably mounted in the body and has a transmission shaft and a driving bevel gear. The spraying device is mounted on the base and has a mounting cover and an spraying ball. The tool adaptor is rotatably mounted in the base below the spraying device and has a transmitting bevel gear, a holding head and a connecting segment.

Abstract: A tapping method includes engaging a front end of a tap with a prepared hole formed in a workpiece. The tap is provided at a tapping tool attached to a rotating mold indexing device that includes a control motor M. The rotating mold indexing device is rotatably provided at a punch press. The tapping method also includes rotating the control motor M positively to rotate the tap positively when the front end of the tap is engaged with the prepared hole. The tapping method also includes stopping positive rotation of the control motor M and rotating the motor reversely, thereby to detach the tap from the prepared hole of the workpiece, when it is detected that the control motor M has rotated a determined number of times or that a predetermined time has elapsed.

Abstract: A compact drilling system capable of improving working efficiency. The drilling system includes a drilling machine and a compressor. A control circuit controls performances of a drill motor in the drilling machine and an air compression motor in the compressor based on the detection result of a pressure sensor that detects a pressure within an air tank provided in the compressor. When one of the motors is activated, the other motor is not allowed to be operated and only when the drill motor is activated, compressed air is supplied from the air tank to the drilling machine. An electrical socket is provided in the compressor. A power cord extending from the drilling machine can be connected to the socket.

Abstract: A motor control module designed to control operation of a plurality of different motors in a plurality of different tools a power tool uses an electronic clutch in the module in conjunction with a mechanical clutch in the tool to protect the tool against an overload event. The module is adapted to implement methods to provide aural and/or tactile feedback to a tool user as a warning of an impending or current fault condition in the tool. The module can prevent power from inadvertently turning on either after an overload event has cleared with the tool plugged in and its power switch on, or after plugging in the tool within the power switch on. The control module is adapted to provide torque control for the power tool, to estimate tool motor temperature and to inform a tool user when a servicing need in the tool is required.

Abstract: A device for the high-speed drilling of boards for printed circuits and the like comprising a support (2), a drill head (11) with associated mandrel (12), and a device for locking and driving a bit (13) in the mandrel, wherein the mandrel is actuated by a compressed air turbine (33) and comprises means (40) for encoding the speed of rotation of the turbine adapted to generate a signal representing this speed, this signal being supplied to a control circuit (61) in order to drive a proportional valve (62) disposed in the circuit supplying compressed air to the turbine as a function of the speed of rotation encoded by the encoder means (40).

Abstract: A power driver may include a housing, a tool chuck and a power take off mechanism. The tool chuck may have an input shaft mounted for rotation on the housing. The input shaft may support chuck jaws. A chuck actuating shaft may be mounted for rotation on the input shaft. The power take off mechanism may be connected to the tool chuck. The power take off mechanism may be adjustable into a DRILL/DRIVE MODE to rotationally drive the input shaft and the chuck actuating shaft together as a unit. Here, a brake may resist relative rotation between the input shaft and the chuck actuating shaft. The power take off mechanism may be adjustable into a CHUCK MODE in which a gear mounted on the input shaft may rotationally drive the chuck actuating shaft relative to the input shaft. Here, the brake may be deactivated.

Abstract: A power driver may include a housing, a tool chuck and a power take off mechanism. The tool chuck may have an input shaft mounted for rotation on the housing. The input shaft may support jaws. A chuck actuating shaft may be mounted for rotation on the input shaft. The power take off mechanism may be connected to the tool chuck. The power take off mechanism may be adjustable into a DRILL DRIVE MODE to rotationally drive the input shaft and the chuck actuating shaft together as a unit, and a CHUCK MODE to rotationally drive the chuck actuating shaft relative to the input shaft. The power take off mechanism may include a shift ring that is movable axially to achieve the various operational modes. During such axial movement, the shift ring may be rotationally locked to the housing and/or transmission components via compliant grounding mechanisms.

Abstract: The disclosure illustrates a dual driver for surgical reamers in which either of a crossbridge and crossbar style reamers are axially inserted in the distal end of a central shaft for the reamer driver. A pair of L shaped grips are adapted to connect and disconnect the different style of reamers by the movement of an external sleeve biased towards the connection position. Movement of the sleeve away from the distal end allows an internal plunger to cam the grips to an open position and urge the appropriate reamer from the tool driver directly in an axial direction.

Abstract: A tool holder comprises an elongated body having a first end portion for receiving a handle and a second end portion with an adjustable tool retaining mechanism for holding a tool, an elongated handle releasably retained in the first end portion and being configured to be slideable between stop positions at opposite ends, and a release mechanism at the first end portion configured to enable the handle to be separated from the body when operated.

Abstract: A power tool having a handle includes a first member configured to selectively engage a housing of a power tool and a second member provided adjacent the first member and movable between a first position and a second position. A portion of the second member restricts movement of the first member when the second member is in the first position and the portion of the second member does not restrict movement of the first member when the second member is in the second position such that the first member may be moved to disengage the power tool housing.

Abstract: A tool for working a workpiece comprises an elongate member and a cam member. The elongate member comprises at least two extremities comprising at least one blade member. The at least two extremities are operable to separate in response to a pressurized medium. A conduit is in fluid communication with the extremities, and a pair of vents are in fluid communication with the conduit. The vents are operable to expel fluid communicated through the conduit. The cam member comprises an inner surface defining an opening. The inner surface of the cam resists expulsion of fluid from the vents, such that the cam and vents are operable to vary the pressure of fluid communicated through the conduit. The pressure variation varies the separation of the extremities as the elongate member is advanced through the cam toward a workpiece. The tool may be used to create bores having a non-cylindrical profile.

Abstract: A drilling device includes an end cutting tool, a main housing, a motor, a transmission, and a dust collection unit. The end cutting tool processes a workpiece. The motor is provided in the main housing for generating a torque. The transmission transmits the torque to rotate the end cutting tool. The dust collection unit collects dust generated by the rotation of the end cutting tool. The dust collection unit includes a dust case for accumulating the dust therein. The dust case is detachable from the main housing and having an inlet and an outlet. The inlet and the outlet are oriented in a single direction.

Abstract: An electric drill (10) has a drive assembly (31, 70), and a pivot head (32) having first and second bit gripping assemblies (14, 22) disposed at 90 degrees to each other. The electric drill (10) also includes means for adjusting the position of the bit gripping assemblies (14, 22) relative to the drive assembly (31, 70) by pivoting the head (32) through 90 degrees, whereby a selected one of the bit gripping assemblies is operatively engaged to the drive assembly. The position adjusting means may include a movable locking sleeve (36) which, in a first position, allows the drive assembly to operatively engage the selected bit gripping assembly and, in a second position, allows the drive assembly to disengage the selected bit gripping assembly.

Abstract: A handle assembly for a power tool 1 comprises a housing 2 defining a handle 4 and housing a motor for actuating an output member of the tool, such as a drill bit or jigsaw blade. The handle assembly comprises at least one flexible sheet 8 adapted to be mounted to a surface of the handle of the power tool and having a series of protrusions 10 adapted to be engaged by a hand of a user of the tool. The protrusions 10 retain one or more blister packs (not shown) containing at least one vibration damping gel material between the flexible sheet 8 and the surface of the handle 4.

Abstract: A method and apparatus for measuring a hole depth in a composite-material workpiece machined by a orbital cutting tool, including the steps of applying a low-level electric potential to an electrically insulated cutting tool having a cutting head with radial and axial cutting edges and with a predetermined axial length; determining a first zero reference position as the cutting tool initially contacts a first surface of the workpiece and closes an electric circuit through the grounded workpiece; and detecting a second reference position when the cutting head penetrates an opposite, second surface of the workpiece. The finished hole depth is determined by deducting the predetermined axial length of the cutting head from the total length of axial advancement from the first zero reference position to the second reference position. The orbital machining apparatus includes ceramic bearings electrically insulating the spindle and the cutting tool from surrounding components of the apparatus.

Abstract: A portable power drill having an automatic drilling cycle for feeding a rotating tool bit to a workpiece to effect the desired operation. The drill uses a rotary gerotor pump to pump hydraulic fluid used in its system, and pressurized air to operate the hydraulic pump. The drill has a clamping assembly which clamps the unit on a workpiece before the drill bit is advanced toward the workpiece. The drill also has an integral drill spindle-planet carrier area which adds to its operability and reliability.

Abstract: An apparatus for machining a circumferential surface defining a cylindrical bore of a workpiece, the apparatus including a tool holder rotatable about a first rotation axis, and a form roller supported on the tool holder so as to be rotatable about a second rotation axis parallel to a central axis of the cylindrical bore of the workpiece. The form roller has a diameter smaller than a diameter of the cylindrical bore of the workpiece and is adapted for forming a plurality of microscopic recesses on the circumferential surface defining the cylindrical bore of the workpiece.

Abstract: A grip assembly for one of a clutch cap for a clutch mechanism, a rear sleeve or front sleeve for a chuck assembly having a chuck mechanism with a plurality of adjustable jaws. The grip assembly includes an inner sleeve having open top and an open bottom opposite the top and defining a longitudinal axis with a peripheral wall disposed between the first end and the second end and an elastomeric grip comprising a plurality of spaced apart ribs extending generally circumferentially about an outer surface of the front sleeve. An optional a cover can encircle the inner sleeve and have a plurality of spaced apart apertures to receive respective ribs.

Abstract: A servo motor in die tapping unit provides built in shock protection for the motor by fixing a shock plate to the servo motor and floatingly mounting the shock plate to a base structure attachable to a stripper plate in a press. Sets of opposing springs allow movement of the shock plate relative the base plate to relieve shock loads when the press is operated, the shock plate guided on dowel pins fixed to the base structure. The shock plate, and tapping unit and base structure form a self contained assembly for mounting together in the press.

Abstract: A tool adapter includes a housing, which comprises a passage with two end openings and two locating portions respectively located adjacent the two end openings, two connecting members respectively rotatably positioned in the locating portions of the housing, the connecting members each having a shaft respectively extended out of the end openings and an engagement portion respectively engaged with each other, and two locating devices respectively mounted in the housing to secure the connecting members to the housing.

Abstract: An apparatus for providing convenient control of a power tool electrical system. A switch assembly includes a first actuator and a second actuator, which is disposed remotely from the switch and first actuator. The second actuator is connected via a coupling device, such that user manipulation of either the first or second actuator is capable of controlling electricity flowing to the motor. Including a second actuator may permit the user to retain greater control over the tool when turning the power on or off. In additional exemplary aspects, a coupling device included in the switch assembly is configured and arranged so as to prevent inadvertent damage to the power tool such as by accidental engagement of a shaft lock while the motor is operating.

Abstract: A tool assembly is provided for working on underground pipes, through a small hole at the pipe surface, by means of an elongate handle member that reaches into the hole, and has a coupling at the lower end thereof, whereby various ones of selected tools may be quickly connected to and disconnected from the lower end of the handle member, by means of a universal coupling, and whereby the tools can be pneumatically driven from above ground.

Abstract: A hand-held power tool is provided with a housing, an attachment member, and an object sensor that is removable from the attachment member. The attachment member may be removable from the tool. The object sensor, which can be used to detect studs hidden behind walls, electrical lines, and other materials, is readily accessible to tradesmen.

Abstract: A cutting auger has a main auger blade and a front subsidiary coaxial blade each having a drive core and a helical auger flight carried on the drive core for rotation about a longitudinal axis of the drive core with a cutting edge at an axial end face of the auger flight, such that when rotated the cutting edge cuts a hole equal in diameter to the helical flight and the helical flight carries the cut material away from the cutting edge. The second auger blade having a smaller diameter than the first, is shorter than the first and is arranged with the helical turns thereof in opposed angular direction. A planetary drive system is arranged to rotate the first and second cutting augers in opposed direction with the first driven at a slower angular velocity than the second so as to balance the torque.

Abstract: A right angle drill (1) includes a motor housing (6) which defines therein a hole (18) for accommodating a motor field system (3), a cut-out (15) formed in the underside of the motor housing (6) from the front end toward the rear of the tool (1), and a light unit (16) slidably fitted in the cut-out (15). The light unit (16) is a plate member having an arcuate cross section so as to define an inwardly curved rear (i.e., inner) surface (16a) along its entire length. The unit's inner surface (16a) conforms to the inner surface of the accommodating hole (18) of the motor housing (6). The light unit (16) additionally includes a protrusion (17) at the front outer surface thereof. Furthermore, the protrusion (17) contains a pair of LEDs (21) for illuminating objects below an output spindle (12) to which a bit can be attached.

Abstract: An electric drill apparatus having a low profile is provided which comprises an annular cutter, a motor for rotating the annular cutter, a rotary shaft assembly for rotating the annular cutter attached to its leading end about a rotating, a rotation reduction mechanism disposed between the motor and rotary shaft assembly for transmitting a driving force of the motor to the annular cutter through the rotary shaft assembly, a feed mechanism responsive to an operation of a manual handle, for moving the rotary shaft assembly along with a straight line to advance or retract the annular cutter attached to the rotary shaft assembly with respect to a workpiece, and an adhesion base for securing the electric drill apparatus to the workpiece. The annular cutter has a plurality of cutting blades comprised of cemented carbide tips fixed on its lower end, thereby it is capable of rotating at a high speed.

Abstract: An apparatus for providing convenient control of a power tool electrical system. A switch assembly includes a first actuator and a second actuator, which is disposed remotely from the switch and first actuator. The second actuator is connected via a coupling device, such that user manipulation of either the first or second actuator is capable of controlling electricity flowing to the motor. Including a second actuator may permit the user to retain greater control over the tool when turning the power on or off. In additional exemplary aspects, a coupling device included in the switch assembly is configured and arranged so as to prevent inadvertent damage to the power tool such as by accidental engagement of a shaft lock while the motor is operating.

Abstract: A hand-held power tool having a multi-speed transmission and a clutch. The multi-speed transmission and the clutch are coupled to one another via a set of interconnecting tabs that are slidingly engaged to one another and secured with pins to inhibit the withdrawal of the tabs from one another. The clutch may include a clutch member, a unitarily formed clutch plate and a plurality of engagement members. The clutch plate includes an annular plate member and a plurality of leg members that extend generally perpendicularly from the annular plate member and which bias the engagement members into engagement with the clutch member. The clutch member may be coupled to an element of the multi-speed transmission, such as to the ring gear of a planetary gear set, so as to reduce the overall size of the power tool.

Abstract: A drill comprising: a power head having a first chuck positioned on a first end and a second chuck positioned on an opposite second end of the power head; a handle attached to the power head, the handle having a trigger switch for controlling a drive motor coupled to the first and second chucks.

Abstract: A portable hand-held multiple bit drill imparts a set of linearly aligned work areas of a work piece, which work areas are respectively and simultaneously drilled by the respective drill bits. A rotary power source communicates with a hand-held body holding a plurality of chucks. Each pair of adjacent chucks having a uniform pre-set spacing apart from each other. The drill chucks holding the drill bits are rotated by respective linearly aligned drive gears, which are rigidly attached to respective shafts driving each respective chuck of the plurality of chucks. The drive gears are rotated by a centrally located central gear, which is attached to a central drive shaft emerging from the hand held housing. The central gear is driven by the power source and each drive gear is a meshed idler gear, which reverses direction, such that all the drive gears are rotated in a same, pre-determined direction.

Abstract: A portable boring and welding machine includes a tool shaft adapted to mount tools for boring and welding workpieces. The shaft extends along an axis and is driven by an electric motor. The motor and the shaft are connected by a helical gearwheel and worm pair, the helical gearwheel being connectable to the tool shaft, and the worm being connected to a drive shaft of the motor itself.