Abstract:
A hole saw includes a cylindrical body disposed along an axis of rotation with a side wall extending axially from a cap end to a cutting end. The cutting end includes a plurality of cutting teeth. A cap includes a rim portion seated on the cap end and an axially extending portion extending into the cylindrical body from the cap end. The side wall defines an aperture including a first slot portion and a second slot portion disposed closer to the cap end than the first slot portion. A wall of the second slot portion nearest the cap end is between approximately 0.010 inches and approximately 0.120 inches axially offset from the axially extending portion of the cap.
Abstract:
L'invention concerne un foret hélicoïdal comprenant successivement une queue (10) d'entraînement dudit foret, un corps principal (11) comportant au moins deux éléments coupants (12) hélicoïdaux séparés par des rainures hélicoïdales (19, 20) et une pointe (14) comportant au moins deux arêtes (15) coupantes. Selon l'invention, sur une portion dudit corps principal (11), dite portion reprise (21), lesdits éléments coupants (12) hélicoïdaux ont une épaisseur de dent e2 inférieure à l'épaisseur de dent ei des éléments coupants (12) hélicoïdaux dans le reste dudit corps principal (11) afin d'augmenter le volume desdites rainures hélicoïdales (19, 20) dans ladite portion reprise (21).
Abstract:
A cutting tool holder adapted for mounting thereon a cutting insert having a top face, a bottom face and an insert bore extending between the top face and the bottom face, and having an inner surface. The holder comprises a seat defined by a base surface and at least one side wall angled to the base surface, a seat bore extending along a bore axis, and having an open end at the base surface. The holder also comprises a securing arrangement having a securing member extending between a proximal end and a distal end, the securing member having a head portion at the proximal end and having its distal end received within the seat bore. The securing arrangement also has a displacement arrangement adapted to displace the securing member along the bore axis of the seat bore between a mounting position in which the head portion protrudes from within the seat bore through the base surface into the seat to a first extent, defining a first gap distance between the head portion and the at least one side wall allowing the cutting insert to be placed within the seat and/or being fully removed from the seat, and a securing position in which the head portion protrudes from within the seat bore through the base surface into the seat to a second extent, smaller than the first extent, defining a second gap distance between the head portion and the at least one side wall smaller than the first gap distance, so as to engage the inner surface of the insert bore, thereby securing the insert between the head portion and the at least one side wall. The insert seat is further formed with a support surface configured for engaging and providing support to the head portion of the securing member at least in the securing position.
Abstract:
A cutting tool holder of the kind in which the fastening screw (securing member) remains engaged with the tool holder seat during mounting/dismounting of the cutting insert. The seat is further formed with a support surface configured for engaging and providing support to the head portion of the securing member at least in the securing position.
Abstract:
An indexable type cutting tool comprises a drill having a shank and a drill body which extends from the shank, the drill body being defined with body flutes, and being formed with an insert seat which has seat side surfaces and a seat bottom surface and body flank surfaces and body thinning surfaces; a drill insert fitted into the insert seat of the drill body, having cutting edges and an insert bottom surface which is brought into close contact with the seat bottom surface, formed with insert flutes and insert side surfaces which are brought into close contact with the seat side surfaces, and defined with a through-hole which passes through the insert side surfaces; and a fastening screw for fastening the drill insert fitted into the insert seat to the drill.
Abstract:
The present invention relates to a hole-saw assembly (10) including a hole saw (26) having at one end a plurality of cutting teeth and at the other end two shafts. The assembly includes a mandrel (16) coaxially aligned with said hole-saw and including a body having two bores there through coaxially aligned with said shafts. An annulus (20) located on top of the body is coaxially aligned with said mandrel and hole saw and includes two holes, the annulus rotatable around its longitudinal axis from a first to a second position. In the first position the annulus holes are aligned with the bores and shafts allowing the shafts to be freely insertable and removable and in the second position the holes are misaligned to lock the shafts to the annulus. The mandrel further includes a pair of driving pins (22) adapted to engage driving apertures (24) found in hole saws especially larger ones. Typically the driving pins may biased to enable the assembly to be used even with those hole saws that do not include driving apertures and that also enables easier assembly of the device. A compressible O-ring (42) may further facilitate the operation of the assembly. This device avoids the problem of thread stripping.