Abstract: An apparatus (100) and method (200) of contact machining having applications in profiling operations utilizes at least one static cutting tool (101) and turret (102) driven by rotary motion (103) about a support mechanism (109) for providing sufficient force to achieve deformation by controlled fracturing (523). This allows the separation of material from a workpiece (105) without imposing axial symmetry upon either the cutting tool (101) or the workpiece (105). The apparatus and method mitigates and/or eliminates the adverse effects of plastic deformation (504) while machining a wider range of shapes and materials with greater productivity and precision than existing methods of machining.

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.