Gotoh's locking tuner with a magnum-style string post, for vintage 11/32 inch (8.73 to 8.8mm) tuner holes, not the modern 10mm standard.
39 guitars checked: 1 likely drop-in, 8 needs verification, 30 requires modification.
Where to buy
Reverb
Being re-verified
Tuner hole size
8.5mm
ConfirmedGear ratio
15:1
ConfirmedMounting pattern
Single rear mounting screw with a press-fit vintage-style bushing (Kluson-style).
Built on the same 10mm post standard used across most modern locking and non-locking tuner lines, a common drop-in on guitars already using modern 10mm tuner bushings.
39 guitars checked: 1 likely drop-in, 8 needs verification, 30 requires modification.
This tuner is vintage-hole sized, matching your guitar's existing holes. A locking upgrade without any reaming needed.
This tuner is itself vintage-spec at 8.73 to 8.8mm, not modern 10mm. This guitar's stock tuners are genuinely vintage-style F-stamped, non-locking tuners at the same 8.8mm vintage-spec holes, so this is actually a same-size swap, not a reaming or bushing-conversion job.
This guitar's exact tuner hole size hasn't been confirmed, and its stock tuners are a different brand than this one. Measure before buying. This tuner is also vintage-hole sized rather than modern, worth factoring into the fit question either way.
This guitar's tuner hole size has not been independently confirmed. LTD locking tuners are not the same brand as this Gotoh option, so hole size compatibility has not been verified for this specific model. Separately, this tuner is itself vintage-hole spec (8.73 to 8.8mm), not the modern 10mm size, so even where this guitar's hole size is eventually confirmed as modern 10mm, conversion bushings would be needed regardless.
Help confirm this fit
Likely matches the standard 10mm bore most current Gibsons use, but this guitar's exact hole size hasn't been independently confirmed. Measure before buying. This tuner is also vintage-hole sized rather than modern, worth factoring into the fit question either way.
This guitar's exact tuner hole size has not been independently confirmed. Matches the well-corroborated 10mm standard seen across most current Gibson USA models, but not specifically measured on this one. Separately, this tuner is itself vintage-hole spec (8.73 to 8.8mm), not the modern 10mm size, so even where this guitar's hole size is eventually confirmed as modern 10mm, conversion bushings would be needed regardless.
Help confirm this fit
Likely matches the standard 10mm bore most current Gibsons use, but this guitar's exact hole size hasn't been independently confirmed. Measure before buying. This tuner is also vintage-hole sized rather than modern, worth factoring into the fit question either way.
This guitar's exact tuner hole size has not been independently confirmed. Matches the well-corroborated 10mm standard seen across most current Gibson USA models, but not specifically measured on this one. Separately, this tuner is itself vintage-hole spec (8.73 to 8.8mm), not the modern 10mm size, so even where this guitar's hole size is eventually confirmed as modern 10mm, conversion bushings would be needed regardless.
Help confirm this fit
The Super Swede already comes with locking tuners from the factory, so this is more of a feel or quality swap than a functional upgrade. Hagstrom does not publish the tuner hole size, so measure your existing posts before buying. This tuner is also vintage-hole sized rather than modern, worth factoring into the fit question either way.
The Super Swede already ships with Hagstrom's own 19:1 locking tuners, so this is a quality or feel upgrade rather than a locking-mechanism upgrade. Hagstrom does not publish the tuner post hole size for the current Super Swede, so fitment against Gotoh's standard 10mm hole cannot be confirmed either way. Separately, this tuner is itself vintage-hole spec (8.73 to 8.8mm), not the modern 10mm size, so even where this guitar's hole size is eventually confirmed as modern 10mm, conversion bushings would be needed regardless.
Help confirm this fit
The Swede already comes with locking tuners from the factory, so this is more of a feel or quality swap than a functional upgrade. Hagstrom does not publish the tuner hole size, so measure your existing posts before buying. This tuner is also vintage-hole sized rather than modern, worth factoring into the fit question either way.
The Swede already ships with Hagstrom's own 19:1 locking tuners, so this is a quality or feel upgrade rather than a locking-mechanism upgrade. Hagstrom does not publish the tuner post hole size for the current Swede, so fitment against Gotoh's standard 10mm hole cannot be confirmed either way. Separately, this tuner is itself vintage-hole spec (8.73 to 8.8mm), not the modern 10mm size, so even where this guitar's hole size is eventually confirmed as modern 10mm, conversion bushings would be needed regardless.
Help confirm this fit
A locking tuner option, but the same caveat applies as our other tuner pick: Hagstrom does not publish the Ultra Swede's tuner hole size, so measure before you buy. This tuner is also vintage-hole sized rather than modern, worth factoring into the fit question either way.
Same 10mm hole assumption as the Grover 406 Rotomatic listed as another tuner option for this guitar, and the same unpublished hole size caveat applies. Separately, this tuner is itself vintage-hole spec (8.73 to 8.8mm), not the modern 10mm size, so even where this guitar's hole size is eventually confirmed as modern 10mm, conversion bushings would be needed regardless.
Help confirm this fit
A locking tuner option, but the same caveat applies as our other tuner pick: Hagstrom does not publish the Viking's tuner hole size, so measure before you buy. This tuner is also vintage-hole sized rather than modern, worth factoring into the fit question either way.
Same 10mm hole assumption as the Grover 406 Rotomatic listed as another tuner option for this guitar. Gotoh's locking tuners are a common semi-hollow upgrade, but without a confirmed hole size for the Viking this stays a plausible fit rather than a verified one. Separately, this tuner is itself vintage-hole spec (8.73 to 8.8mm), not the modern 10mm size, so even where this guitar's hole size is eventually confirmed as modern 10mm, conversion bushings would be needed regardless.
Help confirm this fit
See also
This is a vintage-hole tuner, around 8.8mm. Depending on what this guitar's holes actually measure, it may be a closer match than the modern 10mm sets, but that size isn't confirmed either way. Measure first. If the holes turn out larger, Gotoh sell conversion bushings separately.
The AZES40 has a curved 6-in-line headstock, so a 6-in-line tuner set is the correct shape here. This particular Gotoh is vintage-hole spec, 8.73 to 8.8mm, not the 10mm modern standard. Ibanez's own AZES40 spec sheet lists the stock tuners as split-shaft machine heads, a vintage-style design that normally uses a bore under 9mm, which would make this tuner a closer size match than the modern 10mm sets. That is not the same as confirming it. The AZES40's actual hole diameter is not published and has not been independently measured, so this could seat directly or could need Gotoh's conversion bushings, which are sold separately for exactly this situation.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
If you have fitted any of these to this SD91-05M Magnum Lock, tell us what you found and we'll update the data.
