MACHINING, A manufacturing process in which a cutting tool is used to remove excess materials from a workpiece. It can also be used to shape or finish metal parts., MACHINE TOOLS, Power-driven machines which are used to perform machining operations., TURNING MACHINES (macchine per la tornitura), These machine tools shape a workpiece by ROTATING it against the cutting tool. A LATHE is a possible example of this., DRILLING MACHINE (foratrice), This type of machine is used to form a cylindrical hole in a workpiece., BORING MACHINE (alesatrice), This type of machine is used to finish an existing cylindrical hole, as one formed by drilling., GRINDING MACHINES (rettificatrici /levigatrici)), These shape a workpiece by removing material from it by means of a rotating abrasive wheel., THREADING, This is a machining operation which implies cutting threads in a hole., CHUCK , This is a specialized type of CLAMP used to hold an object, especially a cylinder., SPINDLE, This is a part of a machine around which something turns. In Italian it is called "mandrino"., TURRET LATHE, This has a cylindrical tailstock (= contropunta) that can rotate around a vertical axis. It is used for the repetitive production of duplicate parts..

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