Howto enlarge an 8mm hole ?

Sep 28, 2004 3 Replies

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Boo 21 years ago

Hi,

I have an 8mm hole in a piece of 3mm ally plate (a patr for an electric helicopter sya), unfortunately while the hole is in the correct place, it is not the right size. Does anyone know the right way to enlarge it to 10mm without chewing the work up ? I'm thinking "taper reamer" but am happy to be corrected. If taper reamer is correct then does anyone know where to buy one cheap ? (It only needs to be good for a single hole so I don't want to spend more than necessary).

Many thanks,

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Dave Baker 21 years ago

Well a 10mm drill bit springs to mind as a rather good way of making a 10mm hole. You certainly don't want a taper reamer.

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Tony Jeffree 21 years ago

...or a slightly smaller drill followed by a 10mm (parallel) reamer to finish, if the finished size needs to be accurate.

Regards, Tony

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Tim Christian 21 years ago

Use an 8mm drill/end mill to locate the work, then replace with a 10 mm end mill and go through slowly?

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