Glossary

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

W

Warping

The permanent bending of a part that occurs when certain section of the part shrink faster than others, as result of a non-uniform cooling rate.

Web width

The space between adjacent workpieces that are to be cut from a piece of sheet stock. When all workpieces are cut, this web of material remains attached to the sheet. The web width is used in determining how many workpieces a single piece of sheet stock will yield.

Sheet stock

Wheels

Smooth, cylindrical parts that rotate. (Includes: bearings, cams, casters, disks, pulleys, rings, rollers, tires, etc)

Workpiece

A piece of material that is to be secured in a fixture and machined into the final part. The workpiece can be a sheet, a standard extruded shape (solid bar, hollow tube, or shaped beam), a custom extrusion, or any prefabricated part such as a casting or forging. Each workpiece shape has certain dimensions that are used in planning the machining operations.

Flat sheet	Round bar	Rectangular bar	Hexagonal bar	Round tube
Rectangular tube	I-beam	L-beam	T-beam	U-beam
Z-beam	Custom extrusions

Workpiece clearance

The safe distance away from the workpiece at which the cutting tool can switch from the cutting feed rate to a rapid travel rate. This distance traveled before engaging the workpiece, as well as exiting from the workpiece, is included in the cut length.

Side approach

Top approach

Workpiece load time

The time required to load the workpiece into the machine and secure it to the fixture. The load time can depend on the size, weight, and complexity of the workpiece, as well as the type of fixture.