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A tailstock, also known as a foot stock, [1] is a device often used as part of an engineering lathe, wood-turning lathe, or used in conjunction with a rotary table on a milling machine. It is usually used to apply support to the longitudinal rotary axis of a workpiece being machined.
In archaeology, a tool stone is a type of stone that is used to manufacture stone tools, [1] or tools that use stone as raw material. [ 2 ] Generally speaking, tools that require a sharp edge are made using cryptocrystalline materials that fracture in an easily controlled conchoidal manner. [ 1 ]
Modern cutting and scraping tools can also be coated with titanium nitride to improve wear characteristics. Woodturning tools must be sharpened more frequently than other edged woodworking tools to maintain a clean cut because the wood passes at great speed. Sharpening is usually accomplished with the aid of mechanical devices such as powered ...
An indexing head, also known as a dividing head or spiral head, [1] is a specialized tool that allows a workpiece to be circularly indexed; that is, easily and precisely rotated to preset angles or circular divisions.
Positioning rough stone in a holder, and holding the stone against the edge of a revolving saw or lapidary slitter impregnated with diamond dust to cut and slit stone. Removing cut stone and placing it in lapidary stick. A gemcutter then selects the shaping wheel and applies abrasive compound. They hold a lapidary stick against the revolving ...
The cut displays a very sharp brilliance or fire if the diamond is cut to the correct depth allowing good scintillation. It is generally cut with a 1:14 length to width ratio with straight edges. This straight edged trillion cut is usually used for accent gemstones, on either side of a main, larger stone of a ring.
A dutchman, or in some uses graving piece, is a matching piece of good material used to replace a relatively small damaged area that has been cut out of a larger item, to avoid having to replace the entire item; or, any of various techniques for accomplishing such a repair. In some cases, the meaning has been extended to include small pieces ...
The herringbone method was used by Filippo Brunelleschi in constructing the dome of the Cathedral of Florence (Santa Maria del Fiore). [2]Examples in France exist in the churches at Querqueville in Normandy and St Christophe at Suèvres, both dating from the 10th century, and in England herring-bone masonry is found in the walls of castles, such as at Guildford, Colchester and Tamworth, [1] as ...