ultimate strength
Maximum conventional stress (tensile, compressive or shear) that a material can withstand.
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Glossary Terms
ultrasonic cleaning
Method of cleaning metal or plastic parts by immersing them in an aqueous or solvent-based cleaning solution and imposing ultrasound energy…
ultrasonic machining
Material-removal operation in which an abrasive slurry flows between a tool, vibrating at a high frequency, and a workpiece.
ultrasonic testing
Nonconductive test applied to sound-conductive materials having elastic properties for the purpose of locating inhomogeneities or structura…
undercut
In numerical-control applications, a cut shorter than the programmed cut resulting after a command change in direction. Also a condition in…
undershoot
Tendency of a numerical-control/computer-numerical-control machine to round off the corners of a programmed path because of servo lag or ba…
universal head
Facilitates setups on a tool and cutter grinder by allowing the grinding head to rotate away from the work area, leaving table alignment un…
universal milling attachment
Mounts on a horizontal mill, permitting the spindle to be set at almost any angle.
universal milling machine
Horizontal mill equipped with a table that swivels, with respect to the saddle, allowing angular surfaces to be cut without changing the wo…
universal spiral-milling attachment.
On a universal mill, permits milling helixes with a helix angle greater than 45°. Mills gears, screw threads, worms, twist drills, spiral-m…
V-block
Workholding device with V-shaped slot for holding pipe and other round stock during machining or inspection.
vertical milling attachment
Permits a horizontal mill to perform vertical and angled milling.