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Swapping necks from 12" pot to 11" pot

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Aug 22, 2019 - 2:28:01 PM
770 posts since 12/8/2014

I have a Deering Americana (12" pot) that has a parlor neck. I know that the radaii of a 12" and a 11" pot are slightly different, but I guess I am asking is could that neck be put on the smaller pot with out a lot of reshaping and some shims? Thanks, Dave L.

Aug 22, 2019 - 5:31:25 PM

6736 posts since 12/5/2007

If you want the neck to wobble, side to side, you can bolt it on without re-shaping and without shims. If you want the neck to be stable, you'll have to re-radius the neck or install some shims. If it were me I would glue some 1/8" wide shims on both sides of the neck heel.

I had to mate a 11" radiused Goodtime neck to a flat mounting surface on an Asian aluminum rim so I put a 1/2" wide shim in the middle of the neck and it worked out just fine.

Aug 22, 2019 - 5:42:57 PM

Banjo Lefty


1627 posts since 6/19/2014

Wouldn't the different pot size change the bridge placement? Is that an issue?

Aug 22, 2019 - 6:27:36 PM

12057 posts since 6/29/2005

The smaller pot will change the bridge placement by 1/2", moving it closer to the tailpiece, which will make the sound "snappier". 

Looking at a picture of a Deering Americana 12", the bridge is closer to the center than I would put it, so, to me, anyway, the change to the smaller pot would actually improve it.

Aug 22, 2019 - 6:33:16 PM

1449 posts since 6/2/2010
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You could probably just put some thin leather on both sides of the heel. That should keep the neck from wobbling and would not be permanent if you ever wanted to return it to the original pot.

Of course that assumes that the bolt in the neck will work with the coordinating rod in the new pot since they are probably different lengths.

Aug 23, 2019 - 5:08:59 AM

3546 posts since 5/12/2010

Try the fit before you start adding shims, it might fit fine depending on how Deering cut the radius.

The "wobble" mentioned above would be the case if the heel is actually cut at a 12" radius and mounted to an 11" pot, but I would be surprised if that is the case.

I cut a 10" radius for either a 11" or 12" pot and that gives me a good tight fit.

Aug 23, 2019 - 6:31:33 AM
Players Union Member



420 posts since 4/17/2019

I also use a 5" radius for 11's and 12's. The heel is moveable and forms to fit the rim. No shims. New rim rods.  I think Andy means a 5" radius. 

Edited by - Helix1 on 08/23/2019 06:32:15

Aug 23, 2019 - 6:31:49 PM

770 posts since 12/8/2014

Thank you for your answers. I appreciate it. Regards, Dave L.

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