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Old 09-21-2017, 09:42 AM
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cnccutter cnccutter is offline
Steel Addict
Join Date: Mar 2011
Location: Dorena, Oregon
Posts: 185
I'm not sure why your recessing the washer? The whole idea of using one is to keep the blade centered and away from the scales. That way you don't get the scratchs on the side of the blade when opening and closing.

Now, if you want a flat bottom hole an end mill would work great if you have the material secured well because the end mill isn't self centering and will want to wonder.

They also make a step drill bit and a step end mill that have pilots on the ends to keep them centered in the main hole as you drill.

Last edited by cnccutter; 09-21-2017 at 09:46 AM.
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