Drilling with Forstner Bits

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Forstner BitWhen building a project that requires drilling a flat-bottomed hole, you don’t have many choices. A standard twist bit leaves an angled bottom to the hole. A spade, or paddle bit leaves behind a large pilot hole in the center, and because they cut so aggressively, they don’t leave a very clean hole. Auger bits are for deep drilling, and probably leave an even rougher hole than a paddle bit.

So, what kind of bit should you use?

In this case, I would drill the hole with a Forstner Bit. They cut cleanly and leave primarily a flat surface on the bottom of the hole. They are a bit expensive, but a good choice for this need.

(c) 2014 Chris Baylor licensed to About.com, Inc.

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