Should swap straight into the existing tuner holes, no reaming needed.
Why we say this
Standard curved Fender-style 6-in-line headstock at a 10mm hole.
Tuner
Gotoh SG381 Tuners (Standard, Non-Locking), 6-in-line
Gotoh's SG381 is a compact, sealed-gear tuner used across a wide range of electric guitars, built on the modern 10mm post standard.
20 guitars checked: 12 likely drop-in, 8 needs verification.
For your Jackson Kelly KEX
Needs verificationHole size should match, but Jackson's reverse headstock is known for aftermarket tuner screw holes not lining up.
See the full notes belowIllustration, photo coming soon
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Part specs
Tuner hole size
10mm
ConfirmedGear ratio
16:1
ConfirmedMounting pattern
Single mounting screw per tuner, offset 45° from the post on 6-in-line headstocks, with staggered post heights for the correct break angle.
Guitars we've checked
20 guitars checked: 12 likely drop-in, 8 needs verification.
Should swap straight into the existing tuner holes, no reaming needed.
Why we say this
Standard curved Fender-style 6-in-line headstock at a 10mm hole.
Should swap straight into the existing tuner holes, no reaming needed.
Why we say this
Standard curved Fender-style 6-in-line headstock at a 10mm hole.
Should swap straight into the existing tuner holes, no reaming needed.
Why we say this
Standard curved Fender-style 6-in-line headstock at a 10mm hole.
Should swap straight into the existing tuner holes, no reaming needed.
Why we say this
Standard curved Fender-style 6-in-line headstock at a 10mm hole.
Should swap straight into the existing tuner holes, no reaming needed.
Why we say this
Standard curved Fender-style 6-in-line headstock at a 10mm hole.
Should swap straight into the existing tuner holes, no reaming needed.
Why we say this
Standard curved Fender-style 6-in-line headstock at a 10mm hole.
Matches the tuner holes commonly used on this guitar family. A straightforward upgrade.
Why we say this
Standard non-locking tuners at the common 10mm bore used across current Ibanez fixed-bridge models.
Matches the tuner holes already on this guitar. Your locking nut already handles tuning stability, so these are a straightforward smoother-feeling swap.
Why we say this
Standard non-locking Gotoh tuners at the confirmed 10mm bore used across Jackson headstocks. The locking Floyd nut handles tuning stability, so locking tuners are not required.
Matches the tuner holes already on this guitar. Your locking nut already handles tuning stability, so these are a straightforward smoother-feeling swap.
Why we say this
Standard non-locking Gotoh tuners at the confirmed 10mm bore used across Jackson headstocks. The locking Floyd nut handles tuning stability, so locking tuners are not required.
Should swap straight into the existing tuner holes, no reaming needed.
Why we say this
Standard Gibson-style single-cut 3+3 layout on a 10mm hole.
Should swap straight into the existing tuner holes, no reaming needed.
Why we say this
Standard curved Fender-style 6-in-line headstock at a 10mm hole.
Hole size should match, but this guitar has a pointed reverse headstock where aftermarket tuner screw holes sometimes do not line up.
Why we say this
MH series uses ESP's inline reversed headstock, owner reports describe aftermarket screw holes not lining up.
Help confirm this fit
Needs a 10mm tuner hole. This guitar's stock tuners are a vintage split-shaft design, which normally runs smaller, and the size hasn't been confirmed. Worth measuring before you order.
Why we say this
The AZES40 has a curved 6-in-line headstock, so a 6-in-line tuner set is the correct shape here, not the pointed reverse-headstock version. Hole size is the open question. The standard non-locking SG381 uses the same 10mm bore Gotoh specify for the locking version. 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 rather than the 10mm modern standard, and the AZES40's actual hole diameter is not published anywhere and has not been independently measured. The higher-tier AZ2204 and AZ2402 Prestige ship Gotoh sealed tuners at 10mm, but that is a different tuner design on a different production tier and does not settle the AZES40.
Help confirm this fit
Hole size should match, but this guitar has a pointed reverse headstock where aftermarket tuner screw holes sometimes do not line up.
Why we say this
Ibanez pointed reverse headstock, screw hole alignment not guaranteed.
Help confirm this fit
Hole size should match, but this guitar has a pointed reverse headstock where aftermarket tuner screw holes sometimes do not line up.
Why we say this
Ibanez pointed reverse headstock, screw hole alignment not guaranteed.
Help confirm this fit
Hole size should match, but this guitar has a pointed reverse headstock where aftermarket tuner screw holes sometimes do not line up.
Why we say this
Ibanez pointed reverse headstock, screw hole alignment not guaranteed.
Help confirm this fit
Hole size should match, but Jackson's reverse headstock is known for aftermarket tuner screw holes not lining up.
Why we say this
Jackson pointed reverse headstock, screw hole alignment not guaranteed.
Help confirm this fit
Hole size should match, but Jackson's reverse headstock is known for aftermarket tuner screw holes not lining up.
Why we say this
Jackson pointed reverse headstock, screw hole alignment not guaranteed.
Help confirm this fit
Hole size should match, but Jackson's reverse headstock is known for aftermarket tuner screw holes not lining up.
Why we say this
Jackson pointed reverse headstock, screw hole alignment not guaranteed.
Help confirm this fit
This page has 8 open questions
If you have fitted any of these to this Gotoh SG381 Tuners (Standard, Non-Locking), 6-in-line, tell us what you found and we'll update the data.