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In manufacturing, an undercut is a special type of recessed surface that is inaccessible using a straight tool. In turning , it refers to a recess in a diameter generally on the inside diameter of the part.
An example of a turned part with and without an undercut On turned parts an undercut is also known as a neck or "relief groove". They are often used at the end of the threaded portion of a shaft or screw to provide clearance for the cutting tool, and also referred to as thread relief in this context.
Undercut created during welding. In welding, undercutting is when the weld reduces the cross-sectional thickness of the base metal. This type of defect reduces the strength of the weld and workpieces.
A simple example of molding an external undercut In molding , an undercut is an indentation or protrusion in a shape that will prevent its withdrawal from a one-piece mold. Undercuts on molded parts are features that prevent the part from being directly ejected from an injection molding machine .
An undercut crankshaft is a form of crankshaft for piston engines, where the overall length of the crankshaft is shortened by overlapping the main bearings of the crankshaft with the big end bearings of the connecting rods. Crankshaft close-up Note the tight spacing of the connecting rod between the crankshaft webs in the 3rd cylinder from the ...
An isotropic etchant that creates an undercut An anisotropic etchant leaves no undercut Undercuts from etching (microfabrication) are generally an unwanted side effect, [ citation needed ] however are sometimes used as a feature such as in the Niemeyer–Dolan technique . [ 1 ]
The "chart" actually consists of a pair of charts: one, the individuals chart, displays the individual measured values; the other, the moving range chart, displays the difference from one point to the next.
Undercut procedure, a procedure for fair allocation of indivisible objects. Undercut (boxing), a type of boxing punch; Undercut, a stunt people film; Undercut (hairstyle), a type of hairstyle; Undercut (manufacturing), a recess that is inaccessible using a straight tool; Undercut (welding), a defect that reduces the strength of a weld