I have been finally getting to various project. Discovered today that the very neat double spiral 7/16 auger bit is ... bent. I'm not sure how much out of round, but if I roll the twist, the tang at the end of the shank is rotating in a circle much larger than the diameter of the hole. Not good, tends to cause the entrance hole to "ream out" and become over size.
So, any suggestions on getting it back into straightness?
Typically, auger bits are spring tempered, and so can be straightened by bending using an arbor press and some V-blocks, but it's a bit fiddly.
One has to overbend slightly, see how close to straight it now is, and repeat, rotating the auger in the V-blocks as needed. It need not be perfect to be perfectly useable.
Machine shops can do this, and are usually pretty practiced at such things.
Joe Gwinn
Joe Gwinn snipped-for-privacy@comcast.net on Sun, 10 Jul 2022 11:25:00 -0400 typed in rec.woodworking the following:
Well, of course it is a bit fiddly ...
I have access to Maker Space - maybe I can do it there.
That could work. You will also need clamps on the V-blocks, to prevent undesired rotation of the auger bit while it is being bent back to straight.
Joe Gwinn
Joe Gwinn snipped-for-privacy@comcast.net on Mon, 11 Jul 2022 13:02:16 -0400 typed in rec.woodworking the following:
Let me check my tool box ... (I use to be a machinist. Kind of hard to do that in a 2 bedroom apartment.)
Well, V-blocks don't take *that* much space. Maybe stout wooden (oak or maple?) V-blocks would do for banding an auger.
Joe Gwinn
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