1018results about "Wood boring tools" patented technology

A stop for use with an electric drill bit, the stop having at least one threaded sleeve for positioning the stop relative to a surface into which the drill bit will extend. The stop may have both an inner and an outer sleeve. The sleeves are mounted coaxially, one inside the other about the drill bit. One of the sleeves, preferably the inner sleeve, provides coarse adjustment of the position of the shoulder relative to the tip of the bit, while the other, preferably the outer sleeve, provides fine adjustment of the position of the shoulder relative to the top of the bit.

A cutting tool including a cutter body and a locking screw. The cutter body has one or more pockets for receiving one or more cutting inserts and at least one channel for delivering coolant from a milling machine to the cutting inserts.

The present invention relates to an improved hole-saw assembly and in particular, to a mandrel engageable by a drill and including at least one locking ring or annulus that allows for the base of two hole-saws of different diameter to be quickly and easily mountable and demountable from the mandrel. The hole-saw assembly includes a first hole-saw having a base that includes a pair of drive-pins extending outwardly therefrom and a pair of apertures for insertion therethrough of the drive pins of a second hole-saw. The drive pin pairs are then inserted through corresponding apertures in the mandrel to engage an annulus coupled to the mandrel. The present invention provides for each drive pin to be engaged by the annulus despite the difference in longitudinal length of the drive pins beyond the base of the first hole-saw. The hole-saws are snap-fit within the annulus and may be disengaged by simply rotating the annulus to a second position. A further embodiment of the present invention further allows one to insert the hole-saws into any one of the mandrel insertion points without being concerned about whether it contains the correct engaging means or not. A still further embodiment of the invention prevents slight longitudinal movement which is known to occur when the hole-saws are coupled to the mandrel.

A rotatable tool for chip removing machining includes two parts, viz. a holder part, rotatable around a geometrical center axis, and a replaceable cutting part, which is rigidly connectable to a front end of the holder part via a male / female coupling. The coupling includes a tapering seat in the holder part and a tapering male member, protruding rearwardly from the cutting part. In the seat, there is a slot, which separates two elastically deflectable projections, that may be inwardly deflected towards each other during clamping of the male member in the seat. The male member is elongated in a radial direction, and the seat is in the form of a radial groove into and out of which the sheath body is transversely movable. The male member includes a dove-tail shaped portion received in a dove-tail shaper portion of the groove. A centering button on the male member enters a depression in the holder part to axially center the cutting part.

A depth limiting device includes a stop collar having a an open end portion and an workpiece engaging portion extending along the open end portion thereof for contacting a workpiece; a spindle extending axially through the shell, the spindle including a first end extending from the exterior of the stop collar for attachment to a hole forming apparatus, and an second end interior to the stop collar for attachment to a hole forming bit, wherein the attached hole forming bit projects through the open end portion of the stop collar at a predetermined length corresponding to the desired depth of the hole in the workpiece; and a bearing assembly operatively associated with the stop collar and the spindle for isolating the rotation of the spindle from the stop collar whereby the stop collar ceases to rotate when contacting the workpiece without generating sufficient frictional contact to mar or otherwise damage the workpiece.

A stop for a drill bit having a shaft, the stop having a first member which includes a collet. The collet is configured to receive the shaft of the drill bit and is positionable along the shaft of the drill bit. The stop also has a second member which includes a clamp, for clamping the first member in a desired position along the shaft of the drill bit by securing the collet in a desired position along the shaft of the drill bit. The stop further has an abutment surface on one of the first and second members, for limiting the depth of penetration of the drill bit into an object, the abutment surface being disposed in a fixed position along the shaft of the drill bit by the clamping of the first and second members.

A drilling tool includes a shaft having a front end to which a cutting body provided with cutting edges is detachably connected. In the front end of the shaft, a seat is formed which is delimited by spaced-apart protrusions between which there is a bottom surface. In the protrusion, there is a threaded hole for a screw, which when tightened applies pre-stressing forces to the cutting body. On the inside of the opposite protrusion, there is a supporting shoulder against which the cutting body is pressed when the screw is tightened and applies a lateral pre-stressing force to the cutting body. The protrusions are laterally displaced in relation to each other in order to freely expose the screw beside one of the protrusions.

A rotary cutting tool comprising a solid cutting head mounted to a shank. The cutting head comprises a cutting portion adjacent a cutting head front face and a mounting portion integrally formed therewith and extending rearwardly therefrom. The shank comprises a receiving portion extending rearwardly from a shank front face. When the cutting head is secured to the shank, the mounting portion is received in the receiving portion, and the shank front face is forwardly exposed and adjacent the cutting head front face.

A rotatable cutting tool includes a rotatable tool body and a replaceable cutting tip for chip removing machining. The tool body includes a forward free end having a first dovetail coupling part formed thereon. The cutting tip includes a front cutting end and a rear mounting end. The mounting end includes a second dovetail coupling part joined to the first dovetail coupling part. An actuator, such as a screw, is provided which is arranged for elastically deforming one of the dovetail coupling parts to create a tightly clamped relationship between the first and second dovetail coupling parts. Insertion of a replacement cutting tip is performed by laterally mating the dovetail coupling parts until one of the coupling parts abuts a laterally facing stop surface of the other coupling part.

A cutting tool, and a loose top therefore, includes two parts detachably connected to each other via a threaded joint in which co-operating male and female threads are included in the form of helicoidal ridges. The profile shape of each helicoidal ridge is defined by a top and two flanks, which delimit a helicoidal groove having a bottom. The first flank is inclined in relation to a center axis of the tool at a first angle that is smaller than a second angle of the second flank in relation to the center axis. Accordingly, the thread ridge is reinforced in comparison with thread ridges having a symmetrical profile shape, whereby larger tensile forces than compressive forces can be applied to the threaded joint while avoiding damage to the thread ridges.

A cutting tap comprises a threaded portion including a lead whose thread diameter gradually decreases toward a front end of the lead, a complete thread portion continued from the lead, and four flutes arranged at equal intervals in a circumferential direction. In the cutting tap, a first cutting edge portion for processing a prepared hole is formed at a front end surface of the lead, and a second cutting edge portion for finishing a minor diameter of an internal thread is formed in a part of an outer periphery of the complete thread portion, the second cutting edge portion being one or more pitches long. The cutting tap can perform processing of a prepared hole, tapping, and finishing of a minor diameter by a single step, and can also perform tapping even if a prepared hole for an internal thread is a blind hole or the like and does not have enough space.