Gotoh's vintage Fender-style locking tuner with a Magnum Lock post, made for 6-in-line headstocks with vintage 11/32 inch (8.73 to 8.8mm) peg holes, with neighbouring tuners sharing a mounting screw.
43 guitars checked: 1 likely drop-in, 2 needs verification, 14 requires modification, 26 not compatible.
Where to buy
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.
43 guitars checked: 1 likely drop-in, 2 needs verification, 14 requires modification, 26 not compatible.
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
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
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Epiphone
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Epiphone
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Epiphone
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Epiphone
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
ESP
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
ESP
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
ESP
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
ESP
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Gibson
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Gibson
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Gibson
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Gibson
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Gibson
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Gibson
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Gibson
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Hagstrom
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Hagstrom
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Hagstrom
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
Hagstrom
Wrong layout for this guitar. This set is six tuners in a line, but this guitar's headstock has three per side, so it won't fit.
Layout mismatch: this tuner set is six in a line and this guitar's headstock is three per side, so the set cannot be fitted as sold regardless of peg hole size.
If you have fitted any of these to this Gotoh SD91-05M Magnum Lock, 6-in-line, tell us what you found and we'll update the data.
