Abstract: Disclosed is a convergence machining apparatus based on turning in which a rotational axis of a work piece fixed by a headstock and a tailstock and a center of a width of a slide surface of a bed on which a reciprocal carriage installed with a tool is transferred while being supported are positioned at the same virtual plane, thereby preventing an offset error according to a relative displacement between the work piece and the tool during processing.

Abstract: A rotary drill bit for drilling a subterranean formation may comprise a bit body, a cutting element coupled to the bit body, and a torque-generating assembly configured to apply torque, either continuously or periodically, to the cutting element. The torque-generating assembly may be powered by the rotary motion of the rotary drill bit or may be hydraulically or electrically powered. The cutting element may comprise a substrate, a table of superabrasive material disposed on an end of the substrate, and at least one impelling feature formed along the exterior surface of the substrate. In addition, a method of rotating a cutting element coupled to a drill bit for drilling a subterranean formation may comprise providing a cutting element comprising a table bonded to a substrate, coupling the substrate of the cutting element to a drill bit body, and applying torque to the substrate of the cutting element.

Abstract: A cutting tool assembly is provided for removing flash portions and gates from a molded article. The cutting tool assembly includes a holder device including an upper plate, a cylindrical collar, and a bearing disposed between the upper plate and the cylindrical collar to allow movement of the cylindrical collar relative to the upper plate. The cutting tool assembly further includes a cutting member fixedly secured to the cylindrical collar wherein movement of the cylindrical collar relative to the upper plate provides the cutting member with degrees of rotational freedom to float relative to the molded article during trimming of the flash portions and gates.

Abstract: A metal-cutting mechanism includes an externally threaded screw and a set of non-rotatable insert holders spaced apart equidistantly along an axis of the screw. There are at least first, second, third, and fourth holders arranged axially in succession. The first holder is axially fixed. The second, third and fourth holders are axially movable relative to the first holder. The screw is rotatable relative to the second, third, and fourth holders and is connected thereto such that in response to each revolution of the screw, the second holder is moved in a first axial direction by a distance x, the third holder is moved in the first axial direction by a distance 2x, and the fourth holder is moved in the first axial direction by a distance 3x, whereby the equidistant spacing between the holders is changed by the distance x.

Abstract: A tool device has a toolholder and a profile tool detachably secured to this, both of which comprise stops cooperating with one another for the precise positioning of the cutting profile of the profile tool relative to the toolholder which can be mounted on a machine tool, the stops being constructed in the form of mating surfaces. At least one adjusting element is provided between the toolholder and the profile tool to bring the profile tool to bear on the mating surfaces on the toolholder.

Abstract: A cam shaft tool for a slide type lathe. The invention generally comprises an improved adjustable tool wherein a plurality of holders each carrying a cutting insert is fixed to a main block via an adjustment block. The holder is radially adjustable relative to said adjustment block and axially relative to said main block. The invention also relates to a cutting insert holder for use in a cam shaft tool.

Abstract: A cam shaft tool for a slide type lathe. The invention generally comprises an improved adjustable tool wherein a plurality of holders each carrying a cutting insert is fixed to a main block via an adjustment block. The holder is radially adjustable relative to said adjustment block and axially relative to said main block. The invention also relates to a cutting insert holder for use in a cam shaft tool.

Abstract: A boring bar assembly having a symmetrical carbide tip holder for turning a brake drum and which can be rotated 180 degrees for facing either or both sides of a rotor of a disc brake. A hexagonal bar provides a housing for receiving a depth of cut mechanism including a dial at one end of the bar. A movable dial rod is connected to the dial mechanism and extends through the housing and engages a tool bit holder at the other end of the bar. A carbide tip is positioned and clamped in one of two undercut pockets on opposite sides of the flat head of the bit holder. The holder includes an angular surface engaging the dial rod so that the holder is moved toward and away from the axis of the housing in response to the dial rod. A spring-loaded tool retractor is provided in a bore of the housing and includes an angular end surface which is yieldably urged against a portion of the angular surface of the holder.

Abstract: A draw-knife for producing keyways and for profiling workpiece bores comprising a knife bar whose head portion carries a cutting member which comprises two knife plates arranged side by side in the same plane and being coaxially adjustable, and an immobile knife plate provided behind the latter in the drawing direction of the draw-knife. The cutting edge of the immobile knife plate bridges a gap between the inner ends of the cutting edges of the two adjustable knife plates. The length of the cutting front of the cutting member of the draw-knife is changeable thus allowing one sole tool to adapt to any desired width and fit of the desired grooves or profiles.

Abstract: A tool bit and holder assembly is disclosed wherein a tool holder having a dove-tailed tang for connection with a mounting tool post is provided with a longitudinal groove in one face thereof; the groove having parallel, longitudinally extending and angularly inclined planar side walls intersecting a planar bottom wall of the groove. A single insert tool bit of trapezoidal cross section, having longitudinally convergent, angularly inclined, planar lateral flanks fits into the tool holder groove with one flank thereof engaging one side wall of the groove. A single wedge member, having angularly inclined and longitudinally divergent planar sides engages the other side wall of the groove and the other lateral flank of the tool bit so that application of force on the wedge to move the same toward the bottom wall of the tool holder groove exerts holding force on the tool bit along three right angularly related axes to securely hold the tool bit in fixed operative position.

Abstract: A multi-bladed tool system for use with automatic bar lathes and screw machines is disclosed. Parting and chamfering blades are claimed in an elongated holder in predetermined spaced relationship according to intended workpiece configuration by spacer elements and a set screw driven clamping jaw. The blades may extend through the length of the holder so that both ends of the blades may be used by reversing the holder. The blades are trapezoidal in cross section to provide for adequate transmission of clamping forces to all the blades.

Abstract: The head has a transverse groove in its leading face in which two cutting blade holders with interchangeable cutting blades are clamped by means of a set screw. After loosening of the set screw, the cutting blade holders can be radially and axially adjusted by means of adjusting screws. This enables precise positioning of the cutting blades, to eliminate unequal chip formation, and rough operation due to unequal loading of the blades.