MD test1

• Heating above the transformation range, usually 1300F to 1350F, and cooling slowly to soften the metal and increase in machining

  Annealing
• Heating above the transformation temperature and quenching usually in oil, for the purpose of increasing the hardness.

  Hardening
• Reheating to a temperature below the transformation range, followed by any desired rate of cooling to attain the desired properties of the metal

  Tempering
• Heating to a critical temperature about 1100F to 1300F and holding at fhat temperature for a suitable time for the purpose of reducing internal residual stresses  .

  Stress Relieving
• Heating to some 100F above the transformation range with subsequent cooling to below that range in still air at room temperature to produce uniform structure of the metal

  Normalizing
• A machine tool used for producing holes in metal by the use of a cutting tool called drill

  Drilling Machine
• A machine tool used to form metal parts by removing metal from a workpiece by the use of a revolving cutter with many teeth each tooth having a cutting edge which removes its share of the stock

  Milling Machine
• A machine tool used to sharpen or shape tools by using abrasive wheel

  Tool Grinder
• A machine tool used to enlarge a hole by means of an adjustable cutting tool with only one cutting edge.

  Boring Machine
• A machine tool used to cut metal parts of light, medium and large sections using reciprocating hacksaw blade

  Power Saw
• A machine tool used to machine flat or plane surface with a single point cutting tool.

  Shaper
• A machine tool used for production of flat surfaces on pieces too enlarge or too heavy to hold in a shaper

  Planer
• A machine tool used to finish internal or external surfaces such as holes or keyways by the use of cutter called a broach which has a series of cutting edges or teeth

  Broaching Machine
• An alloy of copper and tin

  Bronze
• An alloy of copper and zinc

  Brass
• The process of forming metal parts by the use of dies after the metal is heated to its plastic range

  Rolling
• The process of forming a metal parts by the use of a powerful pressure from a hammer or press to obtain the desired shape, after the metal has been heated to its plastic range

  Forging
• A manganese steel containing approximately 0.20% carbon

  SAE 1320
• A machine tool in which metal is removed by means of a revolving cutter with many teeth, each tooth having a cutting edge which remove its share of the stock

  Milling machine
• A metal turning machine tool in which the work, while revolving on a horizontal axis, is acted upon by cutting tool which is made to move slowly (feed) in direction more or less parallel to the axis of the work(longitudinal feed)

  Lathe machine
• A machine tool used in production of flat surfaces on pieces too large or too heavy or perhaps too awkward to hold in a shaper

  Planer
• It consists of shaping a piece by bringing it into contact with a rotating abrasive wheel

  Grinding
• A tool used in measuring diameters

  Caliper
• Sued to true and align machine tools, fixtures and works to test and inspect size trueness of finished work, and to compare measurements either heights or depths or many other measurements

  Dial indicator
• The ability of metal to be deformed and considerably without rupture

  Plasticity
• The shop term used to include the marking or inscribing of center points, circles, arcs or straight lines upon metal surfaces, either curved or flat for the guidance of the worker

  Laying Out
• An operation of sizing and finishing a hole by means of a cutting tool having several cutting edges.

  Reaming
• The operation of making a cone-shaped enlargement of the end of the hole, as for a recess for flat head screw

  Countersinking
• The operation of enlarging a hole by means of an adjustable cutting tool with only one cutting edge

  Boring
• An imaginary circle passing through the points at which the teeth of the meshing gears contact each other

  Pitch Circle