21st Centuty Manufacturing: National Initiative For Product Data Exchange: Product Data Exchange Baseline Activity
Covers: standards development projects, tetsing projects, software devlopment and deployment projects, education and training activities and communication activities. Glossary. Charts and tables.
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abrasive alloys aluminum angle Atlas Press austenite automatic basic blade blank boring broach broaching machine carbide carbon cast iron cementite chine chip chuck clamped clearance cooling core Corp crank cutting edge cutting fluid cutting speed cutting tools cylindrical dial diameter drill duced ductility electric electrode end mills equipment eration face feed finish fixtures flat forging furnace gage gear grain gray iron grinder grinding wheel hardening hardness headstock heat hole horizontal hydraulic inch length Machine Tool martensite material measuring method metric micrometer milling cutters milling machine mold molding sand molten metal mounted operation pattern pearlite piece planer plastic plate pressure produced punch quenching range reamer removed rolls rotating sand sawing screw screw thread shank shape spindle steel stroke surface surface grinder tailstock taper teeth temperature thread tion tooth turret lathe Unit vertical welding workpiece
Page 416 - ... as applied to the thread of a nut. Pitch Diameter. On a straight screw thread the diameter of an imaginary cylinder the surface of which would pass through the threads at such points as to make equal the width of the threads and the width of the spaces cut by the surface of the cylinder. Pitch. The distance from a point on a screw thread to a corresponding point on the next thread measured parallel to the axis.
Page 416 - Screw Thread. A ridge of uniform section in the form of a helix on the external or internal surface of a cylinder, or in the form of a conical spiral on the external or internal surface of a cone.
Page 43 - It is necessary, however, to deviate from this rule and to interpolate numbers in the case of some carbon ranges, and for variations in manganese, sulphur, chromium, or other elements. The...
Page 212 - As applied to a caliper this consists of ten divisions on the adjustable sleeve, which occupy the same space as nine divisions on the thimble. The difference between the width of one of the ten spaces on the sleeve and one of the nine spaces on the thimble is therefore one-tenth of a space on the thimble.
Page 61 - M. temperature (about 400° to 600°F (200°C to 315°C) for carbon steels). Cooling to this temperature must be sufficiently rapid to prevent Austenite from transforming to softer constituents at higher...
Page 39 - ... the range given for the content of alloying elements exceeds one or more of the following limits: manganese, 1.65%; silicon, 0.60%; copper, 0.60%; or in which a definite range or a definite minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels: aluminum, boron, chromium up to 3.99%, cobalt, columbium (niobium), molybdenum, nickel, titanium, tungsten, vanadium, zirconium, or any other alloying element...
Page 61 - Upper critical temperature is lowered as carbon increases to 0.85 per cent (eutectoid point). 4. ANNEALING consists of heating steels to slightly above Ac , holding for austenite to form, then slowly cooling in order to produce small grain size, softness, good ductifity and other properties.
Page 416 - ... to make equal the width of the threads and the width of the spaces cut by the surface of the cylinder. Pitch is the distance from a point on a screw thread to a corresponding point on the next thread, measured parallel to the axis. Pitch, in inches, equals (1/ No.
Page 210 - The beveled edge of the thimble is divided into 25 equal parts, with each line representing .001" and every line numbered consecutively. Rotating the thimble from one of these lines to the next moves the spindle longitudinally 1/25 of .025" or .001 inch; rotating two divisions represents .002", and so forth.