Tungsten Carbide Wood Working Drill Bits Ⅳ

In last part we know that as tungsten carbide wood working drill bits, a spade bit has one or two spade shaped points, while a forstner bit is used to create flat-bottomed holes.In this part we go on to introduce more types of wood working drill bits.

6. Twist Bit

A twist bit is the conventional and most common type of drill bit not only for wood working use at home, but also for many other kinds of work, such as metal machining industry. It works for general-purpose drilling in wood, plastic and light metal. Twist bits have spiral flutes to help remove the wood chips easily.

7. Hole Saw

A hole saw drills large holes — such as for installing door hardware or creating a pass-through for wiring. A hole saw creates a plug of waste material; a cut-out in the side of the saw cylinder allows you to pry it out. Typically a hole saw attaches to an arbor or mandrel which includes a shank. The arbor also holds a pilot bit for centering and steadying the cutting blade. Some smaller hole saws have a built-in shank and don't use a pilot bit.

(To be continued. This article is divided into several parts and this is part 4, for part 3 please refer to http://news.chinatungsten.com/en/tungsten-information/80341-ti-10354; for part 5 please refer to http://news.chinatungsten.com/en/tungsten-information/80346-ti-10356)

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