Abstract: A novel drill jig includes an edge alignment guide, a hole-spacing assembly, a second guide, a biasing member, and an actuator. The edge alignment guide is configured to abut an edge of a workpiece to facilitate movement of the workpiece along a first straight line. The hole-spacing assembly includes a protrusion disposed to engage a preexisting hole in a workpiece positioned by the edge alignment guide. The second guide is coupled to the hole-spacing assembly and is configured to facilitate movement of the hole-spacing assembly along a second straight line perpendicular to the first straight line. The first biasing member is coupled to the hole-spacing assembly and is operative to exert a force on the hole-spacing assembly in a direction parallel to the second straight line. An actuator moves the hole-spacing assembly along the second straight line via the first biasing member.

Abstract: A tool holding section opposite the first section with a bore formed in the tool holding section adapted for receiving the shank of the tool. A plurality of stress rods positioned around the bore and comprising a thermal rate of expansion less than a thermal rate of expansion of the tool holding section. The plurality of stress rods form corresponding bulges on the surface of the bore to decrease the inner diameter of the bore to mechanically lock the shank of the tool in the bore.

Abstract: A drill guide that includes associated components and various methods of use herein. The drill guide includes a first guide column and a second guide column provided on a base plate. The drill guide also includes a chuck carrier adapted to operatively receive a drill chuck of a portable drill. The chuck carrier is operably engaged with the first guide column and the second guide column, and the chuck carrier is linearly moveable along the first guide column and the second guide column between a return position and a plunging position relative to the base plate. The drill guide also includes a tapered portion defined in the first guide column. The drill guide also includes a depth stopper that is operably engaged with the first guide column, wherein the tapered portion enables self-tightening of the depth stopper about the first guide column.

Abstract: The present invention provides a self-locking drill chuck, which the front end of its nut is provided with a number of keys, and the spring piece of the self-locking mechanism is assembled on the nut by being elastically limited between the keys of the nut. The second end of the spring piece passes into the gap between the keys and the drill body through a pair of keys among the keys, and is elastically attached to the key by its elasticity. The connecting protrusion of the spring piece is arranged on the portion of the spring piece between the pair of keys, and the lock end is located in the gap between the key corresponding to the lock end and the drill body. The present invention can not only prevent the self-locking state from exiting due to the inertia effect, but also has the advantages of convenient assembly and can further improve the self-locking performance.

Abstract: A rotary cutting tool includes a replaceable cutting head and a tool holder. The replaceable cutting head includes a forward cutting portion and a rearward mounting portion. The mounting portion includes a male coupling member that includes a back-tapered conical external thread. The tool holder includes a female coupling member that includes an internal thread. When the rotary cutting tool is in a locked position, the external thread is threadingly engaged with the internal thread.

Abstract: A rotary cutting tool with a shank and an interchangeable cutting tip, wherein the shank includes a pocket which receives the interchangeable cutting tip via an interference fit. The pocket includes two centering wall portions which, when viewed along a central longitudinal axis, are oriented at a first angle with respect to one another, the first angle being greater than zero. The interchangeable cutting tip is axially displaceable between: an initial position, assumed upon being received in the pocket of the shank; a clamped position, wherein the interchangeable cutting tip is fixedly held with respect to the shank; and a bump-off position, wherein the interchangeable cutting tip is not fixedly held. A holding element holds the interchangeable cutting tip in the clamped position, and a spring assembly which displaces the interchangeable cutting tip between the clamped position and the bump-off position. Other variants and embodiments are broadly contemplated herein.

Abstract: A bit holder is provided including a tool bit receiver body operably configured to receive at least a portion of a tool bit, a retention element configured to retain the tool bit engaged within the tool bit receiver body, a release configured to disengage the retention element enabling removal of the tool bit, a drive element operably coupled to the tool bit receiver body and configured to transfer axial rotation from a driving tool to the tool bit receiver body, and a sleeve disposed around at least a portion of the bit holder and configured such that the tool bit receiver body rotates independent of the axial rotation of at least a portion of the sleeve.

Abstract: The invention relates to a deep hole drilling method for producing a pipe with an inner profile which has at least one recess extending helically along the inner side of the pipe, wherein with a deep hole drilling machine a tool, comprising a basic body extending along a longitudinal axis and at least one cutting edge arranged on an outer circumference of the basic body, is pulled or pushed through the interior of the pipe while being turned about its longitudinal axis, so that the cutting edge completes a cut along a helical cutting line on the inner side of the pipe.

Abstract: Provided is an ultrasonic vibration processing device which can suppress vibration of components due to an ultrasonic vibrator and can perform processing using ultrasonic vibration in a preferable manner; the ultrasonic vibration processing device includes: a housing (10); an ultrasonic vibrator (20) including a horn portion (21A) to which a tool holder (70) is detachably attached and a piezoelectric element (23), the ultrasonic vibrator having a rear end located at a node of ultrasonic vibration and being supported inside the housing (10) so as to be rotatable; a connecting portion (30) stored in the housing (10) so as to be rotatable together with the ultrasonic vibrator (20); a motor (40) connected to the connecting portion (30); and a non-contact power supply unit (50) including a primary transformer (51) and a secondary transformer (52), the primary transformer (51) being fixed to the housing (10) and including a primary coil (51B) that receives high frequency power from an external power supply, the sec

Abstract: The present invention relates to a long hole saw for a composite material insulation panel for easily cutting a steel sheet of a hard material and a heat insulator such as Styrofoam or urethane of a soft material in one direction, wherein it is possible to reduce shaking vibrations generated during the cutting and to easily, precisely, and stably drill holes when drilling holes for the installation of pipes, conduits, etc. into a composite material insulation panel used for wall or roof construction of a building.

Abstract: A drill includes a leading end portion. The leading end portion is flat and has at least two cutting blades extending from a rotation center toward outside in a radial direction. The each cutting blade includes an arc-shaped portion. An inside linear portion is formed in a linear shape and connects to one end of the arc-shaped portion on the rotation center side. An outside linear portion is formed in a linear shape and connects to another end of the arc-shaped portion on an opposite side to the one end. The arc-shaped portion has a cutting edge provided with an arc-shaped portion chamfered surface. The inside linear portion and the outside linear portion each has a cutting edge provided with a linear portion chamfered surface. A drill axis direction width of the arc-shaped portion chamfered surface is smaller than a drill axis direction width of the linear portion chamfered surface.

Abstract: A drill bit includes a body having a first end, a second end opposite the first end, and an axis of rotation extending centrally through the body. The drill bit includes a cutting head with a cutting tip on the axis of rotation and a cutting portion. The cutting portion includes first tip surfaces on opposite sides of the axis of rotation and second tip surfaces on opposite sides of the axis of rotation. Each first tip surface extends radially outward from the cutting tip to a corresponding second tip surface. Each second tip surface extends from a corresponding first tip surface to an outer periphery of the body. The first tip surfaces define a first tip angle measured through the axis of rotation that is oblique. The second tip surfaces define a second tip angle measured through the axis of rotation that is smaller than the first tip angle.

Abstract: The present disclosure provides a clamping jaw assembly and a drill chuck, which solve technical problems of complex structure, small clamping range, poor clamping effect, and high cost of the existing clamping jaw assembly. The clamping jaw assembly includes a first clamping jaw and a second clamping jaw, both of which include a screwing section, an outer surface of each screwing section is arranged with a thread, a top end of each screwing section is arranged with a clamping section, the screwing section is fixedly connected with corresponding clamping section. An inner side of the clamping section of the first clamping jaw includes a first clamping part, and an inner side of the clamping section of the second clamping jaw includes a second clamping part matched with the first clamping part. The present disclosure can be widely used in fields of electric tools, machine tool accessories and medical equipment, etc.

Abstract: This invention concerns a clamping device for firmly holding a part to be clamped at a clamping recess in which the clamping device is arranged. The clamping device comprises a collet with a first external protrusion for engagement with an internal recess in an inner peripheral area of the part that is to be clamped and with a second external protrusion for engagement with an internal recess in an inner peripheral area of the clamping recess. At least one of the first external protrusion or the second external protrusion comprises a first external taper or a second external taper for pulling the part to be clamped axially into the clamping recess by a radial outward movement of the collet or a section of the collet and an operation stud including an external tapered section for effecting the radial outward movement of the collet.

Abstract: According to one implementation, a drill includes the first cutting edges, the second cutting edges and a deflection reducer. The first cutting edges drill a prepared hole to a workpiece. The first cutting edges are formed in a tip side of the drill. The first point angle and each first relief angle of the first cutting edges continuously or intermittently decrease from the tip side toward a rear end side of the drill. The second cutting edges ream the prepared hole. The second cutting edges are formed at positions away in the rear end side from the first cutting edges. The second cutting edges have the second relief angles at a maximum diameter position. The deflection reducer reduces deflection of the second cutting edges. The deflection reducer is formed between the first cutting edges and the second cutting edges. The deflection reducer is inserted into the prepared hole.

Abstract: An electrostatic chuck includes a base plate and a ceramic dielectric substrate. The ceramic dielectric substrate has a first major surface. The first major surface includes at least a first region and a second region. At least one first gas introduction hole connected to at least one of multiple first grooves. The first grooves include a first boundary groove, and at least one first in-region groove. Multiple second grooves and at least one second gas introduction hole are provided in the second region. The second grooves are include a second boundary groove extending along the first boundary and are provided to be most proximal to the first boundary. A groove end portion-end portion distance between the first boundary groove and the second boundary groove is smaller than a groove end portion-end portion distance between the first boundary groove and the first in-region groove.

Abstract: Tool adapter assemblies are presented including: a quick release coupler including: a spindle defining a partial cylindrical cavity, the spindle including a base portion, a body portion, and an end portion where the body portion includes a number of ball stop recesses; a number of ball stops slidingly engaged with the number of ball stop recesses; and a sleeve slidingly coupled with the spindle, where the sleeve is configured to lock and release the ball stops; and an accessory connector including at least one of: one or more annular grooves configured to engage with number of ball stops, a number of detents configured to engage with number of ball stops, or both the annular groove and the number of detents; and an accessory engagement portion positioned along a proximal end of the accessory connector.

Abstract: A deburring tool includes: a case; a hollow sleeve that reciprocates inside the cylinder in a non-rotating manner; a drive gear disposed inside the sleeve, includes a first tooth, and rotates together with the case and the sleeve; a reciprocating shaft disposed inside the sleeve, including a driven gear disposed at a basal end portion of the sleeve and a basal end side of the drive gear, the driven gear including a second tooth, a tool holder disposed at a distal end portion of the sleeve, and slides inside the sleeve in a rotational and reciprocating direction, and a stem that fixes the driven gear and the tool holder, and penetrates the drive gear, a first spring that urges the sleeve toward distal end direction; and a second spring that urges the tool holder from the drive gear toward distal end direction.

Abstract: A single-edge drill for forming a deep hole is provided which includes a body and a shank. The body has a single chip discharge groove in the outer periphery thereof, and includes a small-diameter portion, and a large-diameter portion having coolant delivery grooves in the outer periphery thereof. The body has a core thickness at the distal end portion of the large-diameter portion. At the other portion of the body, the groove bottom of the chip discharge groove is located beyond the rotation center of the drill such that the body has no core thickness, and when taken perpendicularly to the axial direction of the drill, the cross section of the body has a crescent shape. When a hole is formed with the drill, a supply path for coolant liquid is defined between the outer peripheral surface of the small-diameter portion and the radially inner surface of the hole.

Abstract: A drill guide that includes associated components and various methods of use herein. The drill guide includes a first guide column and a second guide column provided on a base plate. The drill guide also includes a chuck carrier adapted to operatively receive a drill chuck of a portable drill. The chuck carrier is operably engaged with the first guide column and the second guide column, and the chuck carrier is linearly moveable along the first guide column and the second guide column between a return position and a plunging position relative to the base plate. The drill guide also includes a tapered portion defined in the first guide column. The drill guide also includes a depth stopper that is operably engaged with the first guide column, wherein the tapered portion enables self-tightening of the depth stopper about the first guide column.