I've built about twenty CBGs in the past year (three, four and five stringers. Fretted and sliders). I've used a number of different style tuners and only occasionally break a string.
Recently, I built a six-stringer with a Piezo pickup. I'm using good quality medium weight, bronze wound strings (0.013~0.056). My tuning is standard guitar tuning (E A D G B E).
In the past three weeks, I've broken the three-string twice, the four-string once and today, the one-string. I'm using an electronic tuner, so I'm not over tightening, but I've never broke strings like.
Note: Every string is breaking right at the point where the string exits the tuner shaft.
I'm using the Gitty black Tombstone sealed tuners. I've used them on at least four other builds and never had a problem.
So, does anyone have any idea what might be causing the breakage?
Has anyone had a similar problem?
Has anyone ever had to smooth and re-contour the string holes in the tuners?
Could they be the cause? A bad batch maybe?
I'm pulling out the last of my hair over this and I really hate pitching almost-new strings.
Thanks
Tags:
I hate gremlins. They defy logic and common sense. They must be rounded up and shipped to Greenland. It's only fitting.
Teflon tape!
Why didn't I think of that before?
It is so thin that I could easily run several wraps through the string hole on the tuner and wrap around any sharp edges and back through the hole.
Wish I had thought of that sooner............
Make sure you are fitting the strings correctly. Just feed the string thru' the post hole, leaving an inch or so surplus, and take 2 or 3 full turns round the post, making sure the string coils down towards the headstock with no overlaps. Having about 3 turns on the post means that most of the the tension in the string is applied as friction between the string and post rather than the mechanical anchor of the entry point of where the string is bent as it goes into the post hole.
If the string is binding at the nut, that could be a contributory factor to overstressing that section of the string.
good point John,with 3 turns,there is no load at the hole,in fact if ,with 3 turns on the post you could just about cut the string at the hole,especially if the 2nd wrap 'trapped' the 1st
Thanks Chickenbone.
I usually push the string through the hole, pull taught, then release about an inch so back through the hole before winding. I agree totally, that with three turns on the post, there should be zero tension of the portion of the string at the hold entry point. Still, the strings all broke right at the post. I can't swear that it is exactly at the entry point, but that's how it looks.
The tuner post is slightly concave up and down it's length and I wonder if that could somehow allow slippage and tension.
Have to see how my countermeasures work out.
non-classic tuner posts are supposed to be a little concave in profile so that the 3-ish wraps below the hole push upwards against each other towards the narrow waist of the post keeping the wraps neat and in friction with each other as well as the post and keeps the leadout at the bottom giving a better break angle.
Thanks JL.
I see the concave post on a variety of different style tuners, but these looked a bit more concave than some others. I was wondering if the small post diameter in the concave area created a sharper than normal bent at the hole exit. That being said, I've used this type of tuner several times before with no problems. It is a mystery why these act differently than others.
I think any possibility of the strings being cut on the exit of the post has been addressed at this point. Will be interesting to see if I get any new breaks.
Ron "Oily" Sprague, henceforth to be known as "Weird Ron" .
My man, that was very, very creative. I keep asking how long you worked on it (and why).
Thanks for passing along this highly visual epithet. It is one of the things that keeps me coming back to the site.
Impressive CV, Ron.
English major makes me think of Prairie Home Companion.
Kipling wrote "Manly Man" verse. Never have to hide what you are reading.
Thanks for posting the verse. I read it again. Still like it........
cant help but I have always said that the G string is evil its always the G string
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