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Re: Barrel Stuck to Top Joint

Author: Dan Shusta
Date: 2014-12-17 23:23

Grenadilla wood is susceptible to expansion by heat. So, allowing the barrel/tenon joint to "cool" over an extended period of time will allow the dimensional characteristics to be reduced. This coupled with a low humidity environment should allow the "expansive" locking at the tenon/barrel joint to be reduced even more than it would if it were warm. (IMO)

Although an expansive cork is certainly not the main issue when a barrel is "stuck" to the upper joint, IMO, having an expansive cork can certainly "add" to the difficulty in separating the two even if only to a minor degree.

As to Grabner's method, I never meant for him or his method to amount to "a special case". Walter simply uses a method that works well for him.

To me, warmth and coolness are relative terms. If the differential difference of warmth and coolness is low, then this small difference might actually be moot. However, a higher difference would probably make a larger change in the dimensional characteristics of the wood and this, IMO, is really what we are discussing. That is, the tenon and barrel dimensions become incrementally larger due to increases in both humidity and heat. So, again, IMO, reducing both will have the greatest influence on separating a stuck barrel after an extended period of time has gone by.

I found a lot of useful information in the following article:

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CCoQFjAC&url=http%3A%2F%2Fwombat123.com.au%2FGrenadilla-Instrument-Preventative-Maintenance.pdf&ei=DceRVMbjOoiEyQSXuIHQAg&usg=AFQjCNGbeZnS1GLUJAfyADt5NffvQp0dSw&bvm=bv.82001339,d.cGU

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Barrel Stuck to Top Joint new

shadow1

2014-12-16 01:45