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Reply by MrRon

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

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MrRon

6188 posts in 4491 days


#1 posted 11-20-2015 05:17 PM

Drills always tend to drill oversize. A 10 mm bit should work OK, but the 13/32 bit is the way to go. The sandpaper on the dowel is another good way. If you have to plug the hole, mix up some JB Weld or other epoxy and coat the inside of the hole. After it hardens, run the 10 MM bit through again. The problem here is getting the gear centered. If you have a lathe, you can mount it and trim the hole to size with small turning tools.


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