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Bolt thread experts...HELP!
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<p>.28 is 280 thousands of an inch in diameter, which is thirty thousands over 1/4 inch in diameter, which is pretty big for micro drill bits, and Chinese dremels are only good for what they are good for; they don't adapt well, and 20k rpm is a bit fast for drilling holes, and you're not even past step one yet. Don't expect things to get better anytime soon.</p><p> If you want to drill a hole today; I suggest putting your micro drill into a pin vise, chuck the pin vise into your drill motor, and drill away.</p><p>-rr</p>
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