investment casting
1. Casting metal into a mold produced by surrounding (investing) an expandable pattern with a refractory slurry that sets at room temperatu…
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Glossary Terms
ion nitriding
Surface-hardening process in which nitrogen ions are accelerated under an electric potential in a closed chamber and become embedded in the…
Izod test
Impact test in which a V-notched specimen, fixed at one end, is subjected to a sudden blow delivered by the weight at the end of a pendulum…
jig
Tooling usually considered to be a stationary apparatus. A jig assists in the assembly or manufacture of a part or device. It holds the wor…
jig boring
High-precision machining (a sophisticated form of milling) that originally pertained to jig and fixture manufacturing. Basic jig-boring pro…
jig grinder
Machine for grinding molds and dies where the positioning, shaping and finishing of holes and other surfaces are needed.
just-in-time (JIT)
Philosophy based on identifying, then removing, impediments to productivity. Applies to machining processes, inventory control, rejects, ch…
K factor
Power constant that represents the number of cubic inches of metal per minute that can be removed by one horsepower input.
kerf
Width of cut left after a blade or tool makes a pass.
keyseating
Milling or grinding an internal keyway. See slotting.
killed steel
Steel treated with a strong deoxidizing agent such as silicon or aluminum to reduce the oxygen content so that no reaction occurs between c…
knockout
Mechanism for releasing workpieces from a die. It is also called ejector, kickout, liftout or shedder.