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12" rim that's not 12"--resizing a 12" tension hoop?

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Nov 16, 2019 - 7:40:48 PM
302 posts since 7/25/2012

A while back, I bought a bare rim from a BHO member that was advertised as a 12" rim. Seemed perfect in that I already had all the 12" hardware. When it arrived, to my dismay, the rim (though beautiful) was about 1/8" under 12". I was able to assemble it, but the head and hoop clearly left a gap between them and the rim. The head is no problem; I'll just source something close to 11 and 7/8. But is there a way to resize the tension hoop so that it'll fit?

Nov 16, 2019 - 8:14:45 PM

jbalch

USA

8656 posts since 11/28/2003

It is fairly common for rims to be under-size. Several popular builders use rims that are 1/8" under the advertised size. Builders who use drum shell stock to make their rims are quite likely to be smaller than 11" or 12" respectvely. I think Drum shells made by companies like Keller are under-size (allowing for installation of a thick outer veneer).

If the size of the head matches the tension hoop - then everything should be fine. The little extra gap shouldn't affect performance at all.

If you do source a smaller tension hoop - you will need a smaller head too.

Nov 16, 2019 - 9:30:52 PM

94 posts since 2/20/2004
Online Now

As referenced by John Balch, an outer veneer can be added to the rim.
For sure easier than resizing a tension hoop. Contact cement, wood veneer and a little sandpaper is all it takes.

Nov 16, 2019 - 9:51:49 PM
Players Union Member

rudy

USA

14651 posts since 3/27/2004

quote:
Originally posted by tucsonsean

A while back, I bought a bare rim from a BHO member that was advertised as a 12" rim. Seemed perfect in that I already had all the 12" hardware. When it arrived, to my dismay, the rim (though beautiful) was about 1/8" under 12". I was able to assemble it, but the head and hoop clearly left a gap between them and the rim. The head is no problem; I'll just source something close to 11 and 7/8. But is there a way to resize the tension hoop so that it'll fit?


Did you contact the person and see if you can get a refund or a correct sized rim?  A full 1/8" smaller in diameter can be problematic in many ways.

Nov 17, 2019 - 10:10:50 AM

12330 posts since 6/29/2005

I make my own tone rings, rims, and tension hoops, so I am able to make them all work together, and my tension hoops are very precisely fitted to the diameter of the tone ring and head.

Because of that, I have had occasion twice to enlarge a tension hoop enough so it would work with a goatskin head, which was thicker than a plastic head.

The way I did it was to cut the tension hoop in the back where it would be under the tailpiece (which is where I normally make the joint anyway), insert a 1/16" -1/8" piece of tension hoop material and silver braze it.  This becomes invisible on a raw brass or patinated tension hoop, but would discolor the joint on a nickel plated hoop, which is why you would want to make the joint under the tailpiece.

Edited by - Ken LeVan on 11/17/2019 10:12:23

Nov 17, 2019 - 12:36:39 PM

Fathand

Canada

11518 posts since 2/7/2008

Some veneers are available in 1/16" thick ( black walnut at my nearest wood store). A layer of this would bring your rim up to 12". This would help if you are installing a 12" tone ring.

Nov 17, 2019 - 2:17:47 PM
Players Union Member

Helix

USA

11987 posts since 8/30/2006

tucsonsean

When and if you need shop Svcs , just call

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