Reply by HokieKen

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Posted on How can a standard sized drill hole be accurately enlarges?

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19378 posts in 2382 days

#1 posted 11-19-2015 09:53 PM

Kazooman’s got the best answer. 13/32 is a dead ringer if you can get one.

The next best option is an adjustable reamer. You can drill the 10mm hole and then sneak up on the size by opening the reamer up a little at a time.

If you don’t want to wait for a reamer, try this. Drill the 10 mm hole. Now chuck a 7/16 or 1/2” wire brush in your drill press. Run it down through the hole and back out QUICKLY. Check the hole size. Rinse and repeat. The brush will take a little off each time but you should be able to sneak up on it well enough to hit your target.

Good Luck!

-- I collect hobbies. There is no sense in limiting yourself (Don W) - - - - - - - - Kenny in SW VA

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