modulus of rigidity
Ratio of shear stress to the corresponding shear strain for shear stress below the proportional limit of the material. Also known as shear …
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Glossary Terms
Latest Glossary Terms
material safety data sheet (MSDS)
Form containing safety, regulatory, physical and other pertinent information regarding a chemical.
multifunction machines (multitasking machines)
Machines and machining/turning centers capable of performing a variety of tasks, including milling, drilling, grinding boring, turning and …
numerical control (NC)
Any controlled equipment that allows an operator to program its movement by entering a series of coded numbers and symbols. See CNC, comput…
nondestructive testing (NDT)
Same as nondestructive inspection but implying use of a method in which the part is stimulated and its response measured quantitatively or …
nitriding
Introducing nitrogen into the surface layer of a solid ferrous alloy. This is done to increase hardness, wear resistance and fatigue streng…
nitrocarburizing
Any of several processes in which both nitrogen and carbon are absorbed into the surface layers of a ferrous material and, by diffusion, cr…
nondestructive inspection (nondestructive examination)
Inspection by methods that do not destroy the part or impair its serviceability.
nontraditional machining
Variety of chemical, electrical, mechanical and thermal processes for machining workpieces. Originally applied to new or emerging processes…
normalizing
Heating a ferrous alloy to a temperature above the transformation range and then cooling in air to a temperature below the transformation r…
nonuniform rational B-splines (NURBS)
Type of curve or surface for which the difference between successive knots (parameter values) need not be expressed in uniform increments o…
outer diameter (OD)
Dimension that defines the exterior diameter of a cylindrical or round part. See ID, inner diameter.
