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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.
A rule of thumb is that the undercut should be at least 1.5 threads long and the diameter should be at least 0.015 in (0.38 mm) smaller than the minor diameter of the thread. [1] Strictly speaking the relief simply needs to be equal or slightly smaller than the minor diameter of the thread.
undercut Making an earlier pit stop in an attempt to gain time on other competitors. The opposite of an overcut. understeer Cornering behaviour where the front wheels do not follow the steered course, but instead push out toward the outside of the turn. Known as push in NASCAR and other stock car racing. The opposite of oversteer. undertray
Plasma etching can be isotropic, i.e., exhibiting a lateral undercut rate on a patterned surface approximately the same as its downward etch rate, or can be anisotropic, i.e., exhibiting a smaller lateral undercut rate than its downward etch rate. Such anisotropy is maximized in deep reactive ion etching (DRIE). The use of the term anisotropy ...
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 ]
Schematic of ultrasonic machining process An ultrasonic drill from 1955. Ultrasonic machining is a subtractive manufacturing process that removes material from the surface of a part through high frequency, low amplitude vibrations of a tool against the material surface in the presence of fine abrasive particles.
Necking results from an instability during tensile deformation when the cross-sectional area of the sample decreases by a greater proportion than the material strain hardens.
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 ...