peripheral milling
Form of milling that produces a finished surface generally in a plane parallel to the rotating axis of a cutter having teeth or inserts on …
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Glossary Terms
phase transformation
Heat generated by machining action that causes changes in the workpiece’s surface layers. This can result in softer- or harder-than-desired…
photochemical machining
Variation on chemical machining that uses a chemically resistant mask that is sensitive to light. Light activates the mask only in the area…
pick-and-place robot
Simple robot or piece of hard automation that is capable of the simple actions of picking an object from a fixed point and placing the obje…
pitch
1. On a saw blade, the number of teeth per inch. 2. In threading, the number of threads per inch.
pitting
Localized corrosion of a metal surface, confined to a point or small area, that takes the form of cavities.
planing machine (planer)
Machines flat surfaces. Planers take a variety of forms: double-housing, open-side, convertible and adjustable open-side, double-cut and mi…
planing
Machining operation that creates flat surfaces. The workpiece is reciprocated in a linear motion against one or more single-point tools. Al…
planing bit
Cutting tool similar in appearance to a turning tool but with a longer shank.
plastic deformation
Permanent (inelastic) distortion of metals under applied stresses that strain the material beyond its elastic limit.
plunge milling
Highly productive method of metal removal in which an axial machining operation is performed in a single tool sequence. The tool makes a se…
plunge turning
Form of hard turning that uses the entire cutting edge or a portion of the cutting edge to create an orthogonal cut.