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Drill without damage

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3. Drill from both directions
Drilling hole of side of board
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After drilling a 1/16" pilot hole through
the workpiece, use the hole to guide
the point of a Forstner or brad-point bit
about halfway through.
Drilling hole of side of board with larger bit
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Repeat on the opposite side of the
part, again using the pilot hole to
guide the point of the bit until the
two larger holes meet.

3. Drill from both directions

If the location of a hole makes it difficult to clamp a backer board in place (such as when drilling cord-access holes in the back of an entertainment center), instead drill from both directions, as shown right, for a hole with clean edges.


 

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