Abstract: A drill reamer (20) comprises an elongate body (21) disposed about a longitudinal axis. The elongate body comprises flutes (22a-22d) having separate hard cutting sections (27a, 28?a, 28?a, 28?b, 28?b) and a soft cutting section (24a, 24b). The soft cutting section is formed of a material such as carbide having a hardness that is less than that of the hard cutting sections, which may be formed of polycrystalline diamond. At least one first hard cutting section (27a) is axially displaced relative to at least one second hard cutting section (28?a, 28?a). The reamer has a tip cutting edge (23a, 23c) and tapered cutting edge portions (24a-24d) disposed at an acute angle relative to the longitudinal axis.

Abstract: A drill reamer (20) comprises an elongate body (21) disposed about a longitudinal axis. The elongate body comprises flutes (22a-22d) having separate hard cutting sections (27a, 28?a, 28?a, 28?b, 28?b) and a soft cutting section (24a, 24b). The soft cutting section is formed of a material such as carbide having a hardness that is less than that of the hard cutting sections, which may be formed of polycrystalline diamond. At least one first hard cutting section (27a) is axially displaced relative to at least one second hard cutting section (28?a, 28?a). The reamer has a tip cutting edge (23a, 23c) and tapered cutting edge portions (24a-24d) disposed at an acute angle relative to the longitudinal axis.

Abstract: Rotary cutting tools for cutting various types of sheet material are known. However, when cutting non-ferrous materials, damage known as fluttering is caused to both surfaces of the sheet material being cut. The requirement for the cutting of larger and larger sheets of material for safety critical applications such as aircraft wings has made fluttering unacceptable. Furthermore, scrapping sheets of material which exhibit fluttering is extremely expensive. Fluttering occurs as a result of excess pressure being placed on a workpiece edge as it is being cut. A rotary cutting tool (10) for a power tool is disclosed in which the cutting tool comprises body means (12) having a first flute (20, 30), a substantially planar first cutting surface (22, 32) and a first cutting edge (24, 34) formed on said first cutting surface; and wherein said first cutting edge (24, 34) is formed at a first angle to a longitudinal axis of the cutting tool. This cutting tool addresses the problems associated with fluttering.

Abstract: Rotary cutting tools for cutting various types of sheet material are known. However, when cutting non-ferrous materials, damage known as fluttering is caused to both surfaces of the sheet material being cut. The requirement for the cutting of larger and larger sheets ofmaterial for safety critical applications such as aircraft wings has made fluttering unacceptable. Furthermore, scrapping sheets of material which exhibit fluttering is extremely expensive. Fluttering occurs as a result of excess pressure being placed on a workpiece edge as it is being cut. A rotary cutting tool (10) for a power tool is disclosed in which the cutting tool comprises bodymeans (12) having a first flute (20, 30), a substantially planar first cutting surface (22, 32) and a first cutting edge (24, 34) formed on said first cutting surface; and wherein said first cutting edge (24, 34) is formed at a first angle to a longitudinal axis of the cutting tool. This cutting tool addresses the problems associated with fluttering.

Abstract: A modular elevator system is disclosed incorporating a wiring and control module which is attached to the elevator car. One of the modules includes a floor selection device and display panel accessible from within the elevator car and a proximity sensor accessible from the outside of the elevator car. The other modules are attached to the elevator shaft and disposed at aligned and vertically spaced locations corresponding to each floor. The modules interact to control door operation and elevator car position.