Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Fri Mar 29, 2024 4:27 am


All times are UTC - 5 hours





Post new topic Reply to topic  [ 6 posts ] 
Author Message
PostPosted: Mon Apr 13, 2020 10:18 am 
Offline
Walnut
Walnut

Joined: Mon Nov 11, 2013 10:34 am
Posts: 7
First name: Paul
Last Name: Maxime
Country: Canada
Focus: Build
Status: Semi-pro
Hello!
I have a quick question about an early 70's Ibanez 2351 Gold Top: does someone know what could be the thread on the barrel-nut (3/8" X 1 5/16" (9.5mm X 30mm) roughly) for the truss rod on this guitar? Most of the replacements I found were threaded for 10-32, but with my taps the 10-32 one just slides-in being too small. The problem is that the allen-key side of that nut is stripped... The closest tap that did fit was a M6X1 and even then it was not perfect.
So if anyone is familiar with the truss rod threading on those pre-lawsuit models, it would be greatly appreciated!
Thank you in advance! :D


Top
 Profile  
 
PostPosted: Wed Apr 15, 2020 6:58 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Mon Dec 27, 2010 9:06 pm
Posts: 2739
Location: Magnolia DE
First name: Brian
Last Name: Howard
City: Magnolia
State: Delaware
Zip/Postal Code: 19962
Country: United States
Focus: Repair
Status: Professional
If the nut's threads are still a decent tight fit and not stretched out from tensioning I would take it to a specialty screw & bolt shop shop like Fastenall. They will have gauges to measure it. It could be a special machine thread. 1/4-24 is one I have used in other types of work and it would not surprise me to see this as an M-7.

_________________
Brian

You never know what you are capable of until you actually try.

https://www.howardguitarsdelaware.com/


Top
 Profile  
 
PostPosted: Wed Apr 15, 2020 8:35 am 
Offline
Walnut
Walnut

Joined: Mon Nov 11, 2013 10:34 am
Posts: 7
First name: Paul
Last Name: Maxime
Country: Canada
Focus: Build
Status: Semi-pro
Thank you Brian for your suggestion!
It might be an M7 thread indeed, I will double check with the thread gauges I have in the shop, but they are not extremely accurate for the nuts, so I might end up going to a fastener shop anyway :mrgreen: Also I hope it is not a 1/4-24...
But in any case, it seems that finding a replacement will be a quite impossible, so I might go to a machine shop and ask them to fabricate a dozen of replacements in stainless steel for me, that way I will have a couple of spares for next time a similar situation happens.


Top
 Profile  
 
PostPosted: Wed Apr 15, 2020 8:54 pm 
Offline
Contributing Member
Contributing Member

Joined: Sun Jun 08, 2014 10:06 pm
Posts: 409
First name: Allan
Last Name: Bacon
State: Kansas
Country: USA
Focus: Repair
Maybe use a fender nut and re-thread it?


Top
 Profile  
 
PostPosted: Tue Apr 21, 2020 6:59 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Mon Dec 27, 2010 9:06 pm
Posts: 2739
Location: Magnolia DE
First name: Brian
Last Name: Howard
City: Magnolia
State: Delaware
Zip/Postal Code: 19962
Country: United States
Focus: Repair
Status: Professional
Do not use stainless!!! The nuts are typically softer than the rod so when something strips it's not the hard to replace rod..... why Gibby and most others use brass.

_________________
Brian

You never know what you are capable of until you actually try.

https://www.howardguitarsdelaware.com/


Top
 Profile  
 
PostPosted: Tue Apr 21, 2020 8:28 am 
Offline
Walnut
Walnut

Joined: Mon Nov 11, 2013 10:34 am
Posts: 7
First name: Paul
Last Name: Maxime
Country: Canada
Focus: Build
Status: Semi-pro
Thank you gentlemen for suggestions!
Indeed, it does make sense to not make it out of stainless steel (my reasoning was: it will be very hard to strip again), in order to not damage the actual truss rod that will be way harder to replace...
And rethreading an existing truss rod nut is an awesome idea! I will definitely try it!
Also, while searching for a replacement, I found these few references that might help someone in the future who might stumble on this thread:

https://reproguitarparts.com/#!/Truss-R ... p/47175176 (The owner of this website really knows his Ibanez guitars, so I take it is a M6 thread afterall)

https://www.touchstonetonewoods.co.uk/p ... -type-6mm/ (These gentlemen offer a nice replacement part (according to the dimensions) at a very reasonable price... but they suspended their international shipping because of the pandemic...)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 23 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com