Glossary Terms

3-D model defined by surfaces. The surface consists of polygons.

Repetitive or random deviations from the nominal surface, which form 3-D topography of the surface. See flows; lay; roughness; waviness.

Metal fines and grinding wheel particles generated during grinding.

Type of turning center designed to turn small, complex, precision parts. It has an automatic lathe that has a sliding headstock and a guide bushing. The sliding headstock is the part of the machine that holds the bar stock and rotates it.

Part-transfer system in which all parts are progressively moved to the next workstation or tooling station at the same time.

Water-based chemical solution that contains no oil. Normally contains additives that improve lubricity and prevent corrosion and rancidity. See semisynthetic cutting fluid.

Milling cutter for machining T-slots. Desired T-slot shape is reverse of cutter shape.

Accessory that mounts in a turning machine’s tailstock for center-drilling chucked work and tapping. See chuck.

Extended flat portion of tapered drill shank, endmill or other tool that allows maximum power transmission and proper positioning of the tool. Reverse shape of the machine-spindle slot into which it fits.

Cylindrical tool that cuts internal threads and has flutes to remove chips and carry tapping fluid to the point of cut. Normally used on a drill press or tapping machine but also may be operated manually. See tapping.

Reamer designed to produce a reamed hole with a specified taper. Principles of standard reamers apply. See reamer.

Guide to which a cross slide is attached that permits the turning of tapers without disturbing the alignment of the tailstock. Also permits taper boring.