Abstract: A blade clamping device for securing a blade assembly on a rotary cutting tool having a body formed with a cylindrical surface concentric with the axis of the cutting tool. The clamping device selectively locks the blade assembly in position along a radially disposed track which is defined by an elongated slot extending radially from the cutting tool body's outer diameter to its inner bore and a key-shaped channel formed inwardly of the elongated slot's bottom wall. A ball head screw is slidingly retained in the key-shaped channel such that its threaded shank is held in threaded engagement with a threaded aperture formed in the blade assembly in order to provide a means to selectively clamp the blade assembly in position along the elongated slot.

Abstract: A tool holder with radial adjustment means. The tool holder has a connecting portion having a connecting shank, an intermediate portion and a head portion, and a tool receiving means for a tool, in particular a rotary tool. All three portions (2, 3, 4) are of substantially disc-like configuration and bear against each other with their faces (2a, 3a, 3b, 4a) which extend radially with respect to the axis (A) of the connecting shank. Provided at the periphery of the connecting portion (2) are two diametrally oppositely disposed recesses (8) into which two claws (9) arranged on the intermediate portion engage with radial play. Provided at the periphery of the intermediate portion (3) are two diametrally oppositely disposed recesses (14) which are displaced through 90.degree. relative to the claws (9) and into which two claws (15) disposed on the head portion (4) engage with radial play.

Abstract: The head of this boring tool carries two bit holders, which can be radially adjusted to different cutting widths by tooth systems provided on sloping faces of the head and/or bit holder. To ensure that there is still reciprocal supporting of the bit holders even in the outermost adjustment range thereof, cams are provided for extending the supporting surfaces. As an alternative to or in addition to this measure, the spacing between the front end face of the head and the surface of the bit holder parallel thereto is made so small that when high cutting forces occur these surfaces are supported on one another before the elastic deformation range of the bit holders is exceeded.

Abstract: The invention relates to a machining tool, especially a milling-cutter, in which each insert-holding cartridge (1) is fixed in a removable manner in a housing made in the body (2) of the tool. A blocking element accessible from the outside cooperates with the body of the tool and bears in service position against an inclined plane (6) of the back side of the cartridge, so as the pressure toward the bottom and forward according to the arrow F blocks the cartridge in its housing on three bearings respectively situated on the bottom (3), the back side (4) and the front side (5) of this housing. The cartridge further laterally bears against a fixed or adjustable stop.

Abstract: An apparatus for supporting a cutting insert is disclosed. A rotatable head includes at least one peripheral slot which has a generally flat bottom and a pair of parallel sides. The parallel sides of the slot are tilted relative to the bottom so that the bottom of the slot forms an acute corner with one side and an obtuse corner with the other side. An insert seat is provided which has a bottom and a back side which meet at an acute angle conformed to the acute corner of the slot. The seat has a front side with a recess to support the cutting insert in a general radial posture relative to the rotatable head. The seat is secured to the slot with the back side of the seat flush with the side of the slot forming the acute corner. The location of the bottom of the seat relative to the bottom of the slot is adjustable. A wedge is forced between the insert and the side of the slot forming the obtuse corner to confine the insert between the wedge and the seat.

Abstract: A cutting tool revolvable about a center axis, comprising a rake surface defined by a plane inclined with respect to the center axis, a cutting edge having a profile which is defined by an intersecting line between a rotational surface drawn by the revolution of the cutting edge and the inclined plane, and a cylindroid clearance surface having generatrices extending in the same direction along a directrix defined by the cutting edge profile.

Abstract: A locking device for holding a blade inserted in an axial groove in a cutting body is disclosed. The blades are usually helical and require a locking device that gives line contact between the locking device and the blade since such blades are made of carbide material which is quite brittle and would be distorted and fractured if the blade was contacted over a wide area. The locking devices are frustoconical in shape and have a screw holding them positively in position. The screw has a left hand thread on one end and a right hand thread on the other so that when the screw is rotated in one direction it loosens the clamping device and when it is moved in the other direction it tightens it.

Abstract: A tool cartridge to be fastened to a boring bar for line boring operations comprising a pair of split legs on the tool cartridge. Each leg has an insert with a threaded bore having a different pitch. A differential screw comprising two threads on the shaft corresponding to the two different threaded bores on each insert effects a micro-adjustment of the radially moveable leg on the cartridge holding the cutting tool when the differential screw is rotated.

Abstract: An adjustable boring bar with a boring head which can be locked, released, readily adjusted radially, removed from the basic bar, replaced in the same position of adjustment and relocked. The boring bar has a self-contained locking device and adjustable index block which cooperate to permit quick disassembly and replacement.

Abstract: The cutter head of a rotary cutting head is formed with three pairs of recesses separated by a wall portion of the head. An abutment member is received in one recess of each pair, and a tool bit in the other recess in such a manner that a cutting edge of the bit projects from the cutter head. A threaded fastener engages the bit and the abutment member and clamps the bit to the wall portion, thereby releasably fastening the bit to the head.

Abstract: A blade-type boring tool having a body on an end of which is mounted a pair of separate and individually adjustable cutters. The cutters are preferably cutting inserts fastened on the side of holders having a mounting surface provided with V-shaped grooves mating a mounting surface on the end of the body provided with corresponding V-shaped grooves. Each holder is held in position on the end of the body by means of a mounting bolt or screw threading in an orientable retainer disposed in a transverse bore in the boring tool body.