Tungsten Carbide Forstner BitsⅠ

Forstner bits are named for Benjamin Forstner, a 19th century American gunsmith who is credited with inventing them. Gunsmiths were the first to popularize the bit; they prized it for its ability to bore a smooth-sided hole in woodwork.

Tungsten carbide Forstner bits are a cylindrical drill bit used to bore precisely flat, deep holes into wood. It is particularly popular in furniture making and other large-scale woodworking projects in part because of its ability to drill deeply and precisely, even against the grain or through various inlays and joined pieces. They can cut on the edge of a block of wood, and can cut overlapping holes. Because of the flat bottom to the hole, they are useful for drilling through veneer already glued to add an inlay. They require great force to push them into the material, so are normally used in drill presses or lathes rather than in portable drills. Unlike most other types of drill bits, they are not practical to use as hand tools.

Forstner bits typically come in a range of different diameters, they are commonly available in sizes from 8–50 mm (0.3–2.0 in) diameter. Sawtooth bits are available up to 100 mm (4 in) diameter.

(To be continued. This article is divided into several parts. Here is part 1. For part 2 please refer to http://news.chinatungsten.com/en/tungsten-information/80701-ti-10455)

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