Drill Bits Of Unusual Smallness

One of the fun things about technology is that there are so many diverse subfields that nobody can stay current with all of them. Occasionally, you come across a tool or process commonly used in another field that seems amazing to those not used to it.

One of the students where I work recently brought in a set of micro-sized drill bits. These are a fraction of a millimeter in diameter; the smallest chuck for my Dremel tool wouldn’t hold them. Even the drill bits for the LPKF PC board milling machine that we use are larger.

I don’t know what they’re generally used for (pilot holes for micro-sized screws?), but whatever it is, it involves extraordinary precision!

The set of micro-size drill bits. (Click for larger.)

A detail view of one of the smaller bits. (Click for larger.)

Thanks for sharing, Mike!


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1 Response to Drill Bits Of Unusual Smallness

  1. Andrew Ticknor says:

    These bits are for a pin vise (aka hand drill, twist drill). It is and hand tool that looks very much like an exacto knife, except that it has a very small colette in one end. The other end usually contains a compartment with screw cap to store additional bits. They are used by hobbyists working with miniatures, models, doll houses, jewelry, etc. Hope this helps!

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