Reply by runswithscissors

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Posted on What kind of bit do I need?

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2765 posts in 2050 days

#1 posted 02-26-2013 05:05 AM

Yes, as Gary L mentioned above, with the set screw you have to be sure it lands on a flute, not into a groove. The split type don’t have that problem, and I imagine they are easier on the bit (not damaging the sharp edged flutes).

Additionally, I don’t like forstners in small diameters, as they don’t clear the chips well and clog up. However, your holes will be so shallow that shouldn’t be a concern. If you do use a brad point twist drill, get a good one with sharp spurs. Cheapies often cut a rough hole, which you don’t want.

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