Metalworking terminology

thumb|Gold filigree intricate work from Portugal thumb|Albanian silver jewellery from 19th and 20th century thumb|Sterling dish, filigree work thumb|Citrine cannetille-work brooch Filigree (also less commonly spelled filagree, and formerly written filigrann or filigrene) is a form of intricate metalwork used in jewellery and other small forms of metalwork.

component of surface finish (surface texture)

permissible limit(s) of variation in an engineered component or system

thumb|upright|A chamfer with a "lark's tongue" finish

machining process by rotation ot the tool

remaining stress in a solid material after removal of the original cause

thumb|upright=1.35|Various examples of swarf, including a block of compressed swarf

thumb|Comparison of countersunk and counterbored holes.

small, local deviations of a surface from a perfectly flat ideal; defined by the three characteristics of lay, surface roughness, and waviness

technique for decorating jewelry

geometric dimensioning and tolerance in engineering

fastening achieved by friction after two parts are pushed together

chemical compound

raised edge or small pieces of material remaining attached to a workpiece after a modification process

two separate velocities in machine tool practice, cutting speed and feed rate

thumb|A counterbore in a metal plate

A pritchel is a type of punch used in forging, particularly in making nail holes in horseshoes. The horseshoe is heated and a hole is punched through 90 percent of the steel with a forepunch or drift punch. The pointed end of the tool should be kept sharp so that the burr is cut out smoothly. The punched hole is lined up over the pritchel hole and the pritchel is driven into the hole, knocking out the remaining metal at the bottom of the punched hole. The temperature of the pritchel should be kept below the red-hot stage as the tool itself will bend and lose its temper. When over-heated it is

Machinability is the ease with which a metal can be cut (machined) permitting the removal of the material with a satisfactory finish at low cost. Materials with good machinability (free-machining materials) require little power to cut, can be cut quickly, easily obtain a good finish, and do not cause significant wear on the tooling. Factors that typically improve a material's performance often degrade its machinability, presenting a significant engineering challenge.

intermediate casting type

thumb|upright=1.3|Tungsten rods with evaporated crystals, partially oxidized with colorful tarnish Tarnish is a thin layer of corrosion that forms over copper, brass, aluminum, magnesium, neodymium and other similar metals as their outermost layer undergoes a chemical reaction. Tarnish does not always result from the sole effects of oxygen in the air. For example, silver needs hydrogen sulfide to tarnish, although it may tarnish with oxygen over time. It often appears as a dull, gray or black film or coating over metal. Tarnish is a surface phenomenon that is self-limiting, unlike rust. Only t

long, narrow indentation in a material, generally made to allow another material or part to move within it and be guided by it

metal pre-product

phenomenon of single point cutting operations in steel