Abstract: A motor-driven ball cutter is disposed in a guide member held in relation to the rotational drive axis and being suspended for pivoting on an axis traversing the rotational axis in the ball's center due to mounting of the suspension coaxially to the rotational axis by means of a handle. The guide member is provided, for example, with an arcuate, outwardly tapered slot against which bears the work. The cutting depth is adjustable.

Abstract: A catch is pinned or screwed to a conventional hole saw pilot pin. The catch is free to pivot through an axial cutout in the pilot pin. The catch is sized and oriented to pass through a previously drilled standard sized pilot hole and is then pivotable out of the cutout into a projecting position extending radially of the pilot hole. In this position, a cut plug is retained on the pilot pin rather than dropped. Upon completion of sawing, the catch can be manually positioned back into the pilot pin cutout and the cut plug can then be removed.

Abstract: An electromagnetic drill stand, of the type having a drill driven by an electric motor and mounted on a stand provided with an electromagnetic coil in the bottom of the stand to secure the stand to ferromagnetic material when the coil is energized, is provided with switch means preventing operation of the motor when the coil is not energized, said switch means being mounted in proximity to said coil and responsive to the magnetic flux of the coil for controlling the power supply to the motor and operative to interrupt the power supply in absence of a predetermined flux density.

Abstract: A gear cutting tool is provided with a chip breaking surface along its front face for breaking chip formations between a side and bottom of a tooth slot as the tool advances through the slot in a cutting operation.

Abstract: The invention relates to a method for the continuous path control of a machine tool, where either the tool or the workpiece is moved along a curve corresponding to the contour for the purpose of producing a given workpiece contour. The shape of the contour is approximated by a plurality of individual points and interpolation is carried out between the points. After each interpolation section, the set point is scanned, a set point/actual value comparison is carried out and a corresponding correction value is put in for the actuating element. To reduce the required effort at good accuracy, set point scanning is carried out after a given path section instead of a given time interval.

Abstract: In a machine for machining metal having a rotating cutting head with a star feed for advancing the cutting head, an adjustable angle drive is provided whereby one can machine a conical concave or convex surface.

Abstract: A broaching tool is described having an elongated tool body with an arcuate face of preferably half-round configuration. A plurality of recesses are formed on the arcuate face, each having a bottom face inclined inwardly and rearwardly within 1-15.degree. of coincidence with the longitudinal axis of the body and an abutment wall extending upwardly from a rearward portion of the bottom face. These recesses are arranged in helical paths of preferably increasing diameter in a rearward direction to form a series of spaced helical rows. Each recess contains a rotatably indexable cylindrical cutter disc. This configuration of broach has the advantages of providing excellent chip clearance between the cutters and also providing a uniform load on the tool during broaching.

Abstract: Method and apparatus for truing metal wheels of railroad locomotives and other rolling stock without removal of the wheels uses automatically controlled mechanism carrying a cutting tool and disposed in an open pit below the wheels which are lifted from removable rail sections for the truing operation. In preferred embodiments of the invention, the wheel to be trued is independently driven and the cutting tool is mounted on a powered cross slide which is controlled by a conventional tracer control unit which causes the cutting tool to remove metal from the wheel to form a wheel contour corresponding to a preestablished pattern.

Abstract: A reversible driver for a threading tool, such as a tap or die, is disclosed. The driver has rotary input and output members with a forward clutch connected therebetween and a reverse clutch connected through reverse gearing between the input and the output members. Each clutch has drive and driven clutch elements and a first spring urges both forward and reverse clutches toward engagement. A second spring is stronger than the first spring and urges the forward clutch toward engagement so that a tap rotated by the output member will tap a hole in a workpiece until the forward clutch is released. Each clutch utilizes a plurality of substantially hemispherical projections engaging longitudinal abutments as a form of dog clutch. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: A shear device for splitting hot metallic bars or billets into smaller forms on a continuous basis, as the metallic bars continuously exit from a mill. The shear device comprises two mechanical complexes. The first mechanical complex is a circular shear for generating shearing stresses in the metallic bar by displacing portions of the metallic bar with respect to adjacent portions thereof, and the second mechanical complex wedges and shapes the deformed metallic bar into separate bars.

Abstract: The invention relates to a cutting tool having a supporting body with a recess holding at least one striplike cutting element and an adjacent cavity intersecting the recess holding a deformable clamping body, a thrust piece and a tightening means. The tightening means applies pressure to the thrust piece which forces the deformable clamping body to fill the cavity and transmit pressure to the cutting element and clamp the same against a bearing wall in the body recess.

Abstract: The proposed cutting tool comprises a holder, wherein a working head is rotatably mounted. The working head carries at least one edge whose cutting lip is defined by intersecting of its face and relief surfaces. The cutting tool incorporates a chip-breaking device, according to the invention, which is essentially a plate made fast on the holder at an angle to the face surface of the edge to provide for chip disposal from the cutting zone and arranged in such a manner that one of its edges crosses the cutting lip of the tool edge and is located as close as possible to the edge face surface, provision being made for the working head to freely rotate.

Abstract: A grooving bar is provided for machining grooves on the inside surface of a casting or the like, such as the split casing for a pump. The grooving bar of the present invention can be inserted into a casing, adjusted for a precision cut and moved from one cutting location to the next. In accordance with one embodiment of the invention, a geared-down adjustment mechanism is provided for precise feeding of the cutting tool.

Abstract: The invention provides a tool slide having a body with a generally cylindrical external surface and a plurality of external grooves therein. Each adjacent pair of grooves defines therebetween a respective dovetail-section rail on which a tool holder can be mounted in use. In practice, the tool slide may be combined with at least one tool holder mounted on one of the rails and having a part-cylindrical locating surface which is complementary to the external surface of the tool slide.

Abstract: A boring reamer with end mill cutters comprising a cutting edge portion, a straight shank and a taper shank. The cutting edge portion is formed at the forward edge of the straight shank, and has, at its forward end, end mill cutters each of which is formed with a chamfer angle portion and a relieving angle portion, and has a reamer, which is slightly larger in the diameter than the end mill cutters and provided with an ultra-left-hand twist right-hand helix angle, and which is formed into a saw-tooth like configuration having a land portion.

Abstract: An indexable insert broach for finishing a cylindrical surface is disclosed. The inserts are mounted on the body of the broach in helical arrays of increasing radii.

Abstract: An adjustable tool holder for securing a drill or like tool to the turret of a machine tool includes an axially extending body member, a tool receiving member positioned alongside the body member, and a radially contractible clamping member encircling both the body and tool receiving members. When the clamping member is contracted, the contours of its circular interior cooperate with the contours of the body and tool receiving members to result in an axial positioning of the members.

Abstract: A finishing broach for a work piece having helical teeth in which an elongated broach body has a multiplicity of series of helically aligned teeth and in which each tooth has sides conforming to the profile shape of the tooth spaces between adjacent teeth on the work piece, and in which the sides of each tooth are inclined to define obtuse and acute included angles at the leading corners. Each series of broach teeth has a leading and a following section. In the leading section at the acute side the teeth are all laterally stepped and backed off. At the obtuse side the teeth are neither laterally stepped nor backed off. In the following section at the obtuse side the teeth are all laterally stepped and backed off. In the following section at the acute side the first few teeth are backed off but are not laterally stepped. The following tooth is neither laterally stepped nor backed off but its side surface is chamfered from the front surface of the tooth rearwardly.

Abstract: A tool carriage for a lathe which permits guiding the tool to cut aspherical lense-shaped surfaces with desired shape factors with only pivotal carriage movement and no carriage translation during the cutting operation. The tool is pivoted about different centers during successive intervals of arc with smooth but instantaneous transitions from one center to another to provide a smoothly contoured aspherical lense-shaped surface. The tool carriage has at least two relatively rotatable, interfitting eccentric ring members (50 and 52) each having an inner and an outer circular bearing which are eccentric to each other. The tool is supported on an inner bearing member (66) which rotatably mates within the innermost one of the eccentric ring members (50 and 52). The outermost eccentric ring member (52) rotatably mates within an outer bearing member (62) which is mounted to a support frame supported by the base of the lathe.

Abstract: An electronic control system is arranged to supply appropriate electrical signals for controlling the rate of advancement of a cutting tool into a surface of a rotating billet for peeling and pulling a strip therefrom with a regulated thickness and tension.