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Drilling a blind hole in the drill

When tinkering, it is often necessary to drill non-through holes of a defined depth, a real headache for many of us. Tips, however, allow to practice this blind hole without difficulty.
The best known is a disconcerting logic: measure directly on the drill the depth of the predicted hole and then make a round of adhesive tape color to easily visualize this limit of drilling. Impossible to miss your shot: drill until the mark is flush with the surface of the support.

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