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Originally, all tool bits were made of high carbon tool steels with the appropriate hardening and tempering.Since the introductions of high-speed steel (HSS) (early years of the 20th century), sintered carbide (1930s), ceramic and diamond cutters, those materials have gradually replaced the earlier kinds of tool steel in almost all cutting applications.
A drill bushing, also known as a jig bushing, [1] is a tool used in metalworking jigs to guide cutting tools, most commonly drill bits.Other tools that are commonly used in a drill bushing include counterbores, countersinks, and reamers.
PCD has good fracture toughness and good thermal stability, and is used in making geological drill bits. Polycrystalline Diamond Composite or Compacts (PDC): They are made by combining some layers of polycrystalline diamonds (PCD) with a layer of cemented carbide liner at high temperature and high pressure. PDC has the advantages of diamond's ...
A butler's sink is a rectangular ceramic sink with a rounded rim which is set into a work surface. [5] There are generally two kinds of butler's sinks: the London sink and the Belfast sink. [ 5 ] In 2006, both types of sinks usually were 61 centimetres (24 in) across and 46 centimetres (18 in) front-to-back, with a depth of 22.5 centimetres (8. ...
Side and end view of a 4-fluted countersink. The fluted countersink cutter is used to provide a heavy chamfer in the entrance to a drilled hole. This may be required to allow the correct seating for a countersunk-head screw or to provide the lead in for a second machining operation such as tapping.
Most traditional ceramic products were made from clay (or clay mixed with other materials), shaped and subjected to heat, and tableware and decorative ceramics are generally still made this way. In modern ceramic engineering usage, ceramics is the art and science of making objects from inorganic, non-metallic materials by the action of heat.
The Hutschenreuther porcelain business was founded in 1814 by Carolus Magnus Hutschenreuther (1794–1845) in Hohenberg an der Eger, Bavaria, Germany. He had previously worked at the Wallendorf porcelain manufactory in Lichte (Wallendorf). After his death in 1845, the factory was headed by his widow, Johanna Hutschenreuther, and her two sons.
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