GLOSSARY OF FINISHING TERMINOLOGY

Abrasive A material or tool consisting of hard particles used to wear down, rub away, or machine material. Abrasive materials are often used in finishing operations.

Anodizing A coating method that uses electricity to build an oxide layer on a ferrous workpiece. In anodizing, the workpiece is the anode.

Barrel Finishing A mass finishing process that finishes parts inside a slowly rotating container filled with a solution and finishing media. Also called tumbling.

Burr A sharp, unwanted projection on a machined workpiece. Burrs are removed during finishing to increase the functionality and appearance of the part.

Coating A protective or decorative film applied to the surface of an object. Paint is a common type of coating.

Cold Working The shaping of metal at temperatures much lower than the metal’s molten state, often at room temperature. Cold working adds certain properties to the metal, such as increased strength and improved surface finish.

Deburring A finishing process that removes burrs from a workpiece.

Electroplating A coating method that uses electricity and a conductive solution to deposit a layer of plating metal on a metal or nonmetal workpiece. During electroplating, the workpiece is the cathode.

Finishing A final process performed on a part. Finishing processes include cleaning, final sizing, polishing, and applying coatings.

Finishing Media Grains of abrasive or non-abrasive material used in mass finishing and other finishing operations. Sand and ceramics are common materials in finishing media.
hand deburring Removing burrs manually with the use of various hand-held tools, like knives, files, or motorized wire brushes.

Lapping A final finishing process that uses a fine abrasive to grind away small amounts of material from a workpiece.

Mass Finishing Finishing a group of pieces simultaneously, usually by barrel or vibratory finishing.

Shot The round finishing media used in shot peening. Steel, glass, and ceramics are common shot materials.

Shot Peening A finishing method that uses a propelled stream of round shot beads to cold work metal surfaces. Shot peening corrects minor surface defects and strengthens the material.

Tumbling A mass finishing process that finishes parts inside a slowly rotating container filled with a solution and finishing media. Also called barrel finishing.

Vibratory Finishing A mass finishing process that finishes parts by rotating them inside a vibrating container filled with a solution and finishing media.