# Locking Tuners

Discussion in 'Tech-Talk' started by rolandson, Aug 28, 2021.

1. ### ThreeChordWonderSenior Stratmaster

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As for split shafts, I measure about 3 inches of string beyond the post in question before I cut the strings for the wound strings on a Strat, but on someone else's advice I leave the plain strings full length for added tuning stability.

You loose about 3/4 inch bending the string over and sticking it down the hole. 3 full wraps round an about a 1/4 inch diameter post requires 3 x pi x 1/4 = about 9/4 or 2-1/4 inches (about 57 mm). So the total extra length required is about 2-1/4 + 3/4 = 3 inches.

I also found that with a little practice, it's usually possible to get the first and sometimes the second wrap by flipping the string over the post rather than turning the tuner. It save a little time and wrist strain.

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2. ### ThreeChordWonderSenior Stratmaster

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The Capstan Equation, by the way, gives us the ratio of tension on the slack side to the tension on the taut side of a tuning post (or ship's capstan, where the name comes from) as the number e raised to the power negative mu x theta.

The number e (2.718 to 3 decimal places) is one of those magical numbers like pi that seems to govern the whole flipping universe.

mu is the friction coefficient between the string and the post. 0.1 is a conservative number for a shiny string on a shiny post. The higher the number, the greater the effect.

theta is the wrap angle in radians. 2 x pi radians equals 360 degrees or 1 full wrap.

So using these numbers we get:

1 wrap, tension at the clamp or hole entry is reduced to about 53% of the full string tension;

Injuearing huh?

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3. ### BowmapI nose a thang or two.Platinum Supporting Member

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4. ### CB91710No GAS shortage hereDouble Platinum Supporting Member

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+1
The Gibson SG has a reputation for being a neck-diver. My Epiphone SG is horrible about that, but the black Gibson is stable, even with the locking Grovers.

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5. ### rolandsonDr. Stratster

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Oh, you had to do that didn't you...!
You brought the fringes of trig into this...
You get what's gonna happen now right? There are those just waiting to pounce since that "6 over the end of the world" thing petered out.

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6. ### ThreeChordWonderSenior Stratmaster

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I'm working on a biomass powered string winder today...

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7. ### BowmapI nose a thang or two.Platinum Supporting Member

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I have an alcohol fueled one. Does the 1/4 turn in about .3 seconds. It does have a steering problem at times pushing the string through the hole.

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8. ### CB91710No GAS shortage hereDouble Platinum Supporting Member

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Sounds like 1 wrap won't slip

9. ### StratUpSenior Stratmaster

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Locking tuners, harrumph... you guys probably drive cars with automatic transmissions use a damn microwave to reheat your leftovers.

Get off my lawn!

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10. ### Believer7713The Pink Bunnyman FrankensteinSilver Member

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This is how I change puckguards with locking tuners. I never break the strings either. Though, I have to admit that I did until I figured out the cork trick.
Go to 6:30 in this video and you will see it.

It does also work on standard pickguards too. Just easier with the ones in the video.

11. ### ThreeChordWonderSenior Stratmaster

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^You can't do that on a Tele

12. ### Wound_UpCustom TitleSilver Member

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Off topic but I can't stand microwave reheated food. It tastes weird. There's only a few things I'll even eat reheated and pasta is the main one. Not much else. I'll reheat spaghetti and lasagna and a couple of other things but that's it.

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13. ### Wound_UpCustom TitleSilver Member

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Oh helllll nah! Lol! I'd gash my guitar ALLLLL up doing it that way. I'd like to see that one after he did that because it didn't look to come out cleanly.

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14. ### Believer7713The Pink Bunnyman FrankensteinSilver Member

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Here you go. It's my guitar, my video.

It really isn't that hard to change them either
I'm working on setting up a 1993 American strat body with that system that will make it a ton easier yet too.
Edit, the trick is to keep your p'up screws short.

Last edited: Sep 9, 2021
15. ### rockon1Senior StratmasterSilver Member

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Unless youre gonna use your trem locking tuners arent necessary.

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16. ### BowmapI nose a thang or two.Platinum Supporting Member

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True, but the ease of string changes, especially with auto-trims, it attractive. I may have a few guitars so string changing can take 1/2 day.

17. ### Wound_UpCustom TitleSilver Member

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Thank you! The screws were exactly what I was thinking about. Especially on humbuckers. Had I known it was your vid, I'd have just asked directly.

Did you come up with the 2-piece pickguard idea? That's pretty slick and I may try it on one of mine if it's not a big deal to do.

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18. ### Believer7713The Pink Bunnyman FrankensteinSilver Member

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Actually, @Stephen James has the patent on it.
Another trick I find is to use a piece of silicone model fuel line to cover the ends of the screws like I did here.

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19. ### TwinStrat-Talker

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I have problems with arthritis and locking tuners are much easier, even more so with Fender.

20. ### DibbsSenior Stratmaster

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I like Schallers, based on the ones I use, but I have no experience with Kluson or Gotoh. I hear they are also exceptional quality.

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