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The wood screw, spurs and cutting edge at the end of the bit would need to be removed as well as the first flight of the auger, which had a shorter pitch. I ground away the bulk of the unwanted material on the bench grinder. The first flight was removed so the remainder of the auger would be of consistent pitch. With the bit held at 1 end and being turned in my small lathe, I hand held a Dremel Tool (with a cutoff blade) and very gradually ground the end of the bit to a more consistent diameter. Both ends of the auger will be centered and epoxied inside a wood dowel so the auger (worm) will run true when held between a pair of wood pillow blocks.

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