Glossary Terms

Glossary-terms October 30, 2018

Ratio of shear stress to the corresponding shear strain for shear stress below the proportional limit of the material. Also known as shear …

Glossary-terms October 30, 2018

Form containing safety, regulatory, physical and other pertinent information regarding a chemical.

Glossary-terms October 30, 2018

Machines and machining/turning centers capable of performing a variety of tasks, including milling, drilling, grinding boring, turning and …

Glossary-terms October 30, 2018

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…

Glossary-terms October 30, 2018

Same as nondestructive inspection but implying use of a method in which the part is stimulated and its response measured quantitatively or …

Glossary-terms October 30, 2018

nitriding

Introducing nitrogen into the surface layer of a solid ferrous alloy. This is done to increase hardness, wear resistance and fatigue streng…

Glossary-terms October 30, 2018

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…

Glossary-terms October 30, 2018

Inspection by methods that do not destroy the part or impair its serviceability.

Glossary-terms October 30, 2018

nontraditional machining

Variety of chemical, electrical, mechanical and thermal processes for machining workpieces. Originally applied to new or emerging processes…

Glossary-terms October 30, 2018

normalizing

Heating a ferrous alloy to a temperature above the transformation range and then cooling in air to a temperature below the transformation r…

Glossary-terms October 30, 2018

Type of curve or surface for which the difference between successive knots (parameter values) need not be expressed in uniform increments o…

Glossary-terms October 30, 2018

outer diameter (OD)

Dimension that defines the exterior diameter of a cylindrical or round part. See ID, inner diameter.