Question | Answer |
Shear | to cut metal by means of shearing with two blades in sliding contact |
Shearardize | to galvanize a piece with a coating of zinc by heating it in a drum with zinc powder, to a temperature of 575 - 850 degrees F |
Shim | a thin piece of metal or other material used as a spacer in adjusting two parts |
Solder | to join with solder, usually composed of lead and tin |
Spin | to form a rotating piece of sheet metal into a desired shape by pressing it with a smooth tool against a rotating form |
Spline | a keyway, usually one of a series cut around a shaft or hole |
Spotface | to produce a round spot or bearing surface around a hole, usually with a spotfacer. The spotface may be on top of a boss or it may be sunk into the surface. |
Sprue | a hole in the sand leading to the gate, which leads to the mold, through which the metal enters |
Steel Casting | like cast iron casting except that in the furnace scrap steel has been added to the casting |
Swage | to hammer metal into shape while it is held over a swage, or die, which fits in a hole in the swage block, or anvil |
Sweat | to fasten metal together by the use of solder between the pieces and by the application of heat and pressure |
Tap | to cut relatively small internal threads with a tap |
Taper | conical form given to a shaft or a hole. also refers to the slope of a plane surface |
Taper Pin | a small tapered pin for fastening, usually to prevent a collar or hub from rotating on a shaft |
Taper Reamer | a tapered reamer for producing accurate tapered holes, as for a taper pin |
Temper | to reheat hardened steel to bring it to a desired degree of hardness |
Template or templet | a guide or pattern used to mark out the work, guide the tool in cutting it, or check the finished product |
Tin | a silvery metal used in alloys and for coating other metals, such as tin plate |
Tolerance | total amount of variation permitted in limit dimension of a part |
Trepan | to cut a circular groove in the flat surface at one end of a hole |
Tumble | to clean rough castings or forgings in a revolving drum filled with scrap metal |
Turn | to produce, on a lathe, a cylindrical surface parallel to the centerline |
Twist Drill | a drill for use in a drill press |
Undercut | a recessed cut or a cut with inwardly sloping sides |
Upset | to form a head or enlarged end on a bar or rod by pressure or by hammering between dies |
Web | a thin flat part joining larger parts. also known as a rib |
Weld | Uniting metal pieces by pressure or fusion welding processes |
Woodruff (key) | a semicircular flat key |
Wrought Iron | iron of low carbon content useful because of its toughness, ductility, and malleability |