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, matching this tuner's post diameter.
Tuner
Grover Grover Rotomatic Locking Tuners (6-in-line Chrome)
Grover's sealed-gear Rotomatic in a locking, full-size body for 6-in-line headstocks, at the modern 10mm post standard.
25 guitars checked: 11 likely drop-in, 14 needs verification.
Where to buy
Reverb
See current price at ReverbIn stock
Being re-verified
Part specs
Tuner hole size
10mm
ConfirmedGear ratio
18:1
ConfirmedMounting pattern
Single rear mounting screw with a threaded hex peghead bushing.
Installation notes
Remove existing tuners. Insert new tuners and tighten washers. Lock strings via thumbscrew.
Guitars we've checked
25 guitars checked: 11 likely drop-in, 14 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, matching this tuner's post diameter.
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, matching this tuner's post diameter.
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, matching this tuner's post diameter.
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, matching this tuner's post diameter.
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, matching this tuner's post diameter.
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, matching this tuner's post diameter.
Built for 10mm tuner holes, which is what this guitar has. Swaps straight in, no reaming.
Why we say this
The AZ2204 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 used elsewhere in Ibanez's range. The guitar's tuner holes are 10mm, the modern standard Ibanez use across the AZ Prestige and Premium line. Grover's full-size Rotomatic locking housing requires a 10mm bore, so it is a direct size match.
Built for 10mm tuner holes, which is what this guitar has. Swaps straight in, no reaming.
Why we say this
The AZ2402 Premium 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 used elsewhere in Ibanez's range. The guitar's tuner holes are 10mm, the modern standard Ibanez use across the AZ Prestige and Premium line. Grover's full-size Rotomatic locking housing requires a 10mm bore, so it is a direct size match.
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, matching this tuner's post diameter.
Yamaha uses this same tuner family as factory equipment on higher-spec Pacificas built on the same platform.
Why we say this
Yamaha fits genuine Grover locking tuners as standard equipment on higher Pacifica trims built on the same platform, at the same bore size as this guitar's open-gear tuners.
Hole size should match, but this guitar has a pointed reverse headstock where aftermarket tuner screw holes sometimes do not line up with the factory ones.
Why we say this
ESP MH series uses an inline reversed headstock, a pointed style distinct from the curved Fender-style 6-in-line. Owner reports on similarly shaped reverse headstocks describe aftermarket tuner screw holes not lining up with factory pilot holes even when post diameter matches.
Help confirm this fit
This is the full-size tuner body, and Explorer's headstock is tight enough that neighboring tuners can crowd each other. The compact Mini Rotomatic version is probably the better fit here.
Why we say this
Explorer's headstock is tight enough that Grover's compact Mini Rotomatic body is the version usually recommended for it, because a full-size tuner body can crowd its neighbours. Post diameter likely matches at 10mm, but the full-size body itself is a genuine fit risk here that the previous note did not account for. The Mini Rotomatic version is the more likely correct match for this headstock shape.
Help confirm this fit
Built for 10mm tuner holes. The stock tuners here are a vintage split-shaft type, which usually means a smaller hole, and the real size isn't confirmed. Check yours before ordering.
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. Grover's full-size Rotomatic locking housing requires a 10mm bore. 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 Premium 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 with the factory ones.
Why we say this
Ibanez pointed reverse headstock. Owner reports on this headstock style describe aftermarket tuner screw holes not lining up with factory pilot holes even when post diameter matches.
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 with the factory ones.
Why we say this
Ibanez pointed reverse headstock. Owner reports on this headstock style describe aftermarket tuner screw holes not lining up with factory pilot holes even when post diameter matches.
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 with the factory ones.
Why we say this
Ibanez pointed reverse headstock. Owner reports on this headstock style describe aftermarket tuner screw holes not lining up with factory pilot holes even when post diameter matches.
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 with the factory ones.
Why we say this
Ibanez pointed reverse headstock. Owner reports on this headstock style describe aftermarket tuner screw holes not lining up with factory pilot holes even when post diameter matches.
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 with the factory ones.
Why we say this
Ibanez pointed reverse headstock. Owner reports on this headstock style describe aftermarket tuner screw holes not lining up with factory pilot holes even when post diameter matches.
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 with the factory ones.
Why we say this
Ibanez pointed reverse headstock. Owner reports on this headstock style describe aftermarket tuner screw holes not lining up with factory pilot holes even when post diameter matches.
Help confirm this fit
Hole size should match, but Jackson's reverse headstock is known for aftermarket tuner screw holes not lining up with the factory ones.
Why we say this
Jackson pointed reverse headstock. Real owner reports specifically describe aftermarket locking tuner screw holes not lining up with the factory pilot holes on this headstock style even when post diameter matches.
Help confirm this fit
Hole size should match, but Jackson's reverse headstock is known for aftermarket tuner screw holes not lining up with the factory ones.
Why we say this
Jackson pointed reverse headstock. Real owner reports specifically describe aftermarket locking tuner screw holes not lining up with the factory pilot holes on this headstock style even when post diameter matches.
Help confirm this fit
Hole size should match, but Jackson's reverse headstock is known for aftermarket tuner screw holes not lining up with the factory ones.
Why we say this
Jackson pointed reverse headstock. Real owner reports specifically describe aftermarket locking tuner screw holes not lining up with the factory pilot holes on this headstock style even when post diameter matches.
Help confirm this fit
Hole size should match, but Jackson's reverse headstock is known for aftermarket tuner screw holes not lining up with the factory ones.
Why we say this
Jackson pointed reverse headstock. Real owner reports specifically describe aftermarket locking tuner screw holes not lining up with the factory pilot holes on this headstock style even when post diameter matches.
Help confirm this fit
Hole size should match, but Jackson's reverse headstock is known for aftermarket tuner screw holes not lining up with the factory ones.
Why we say this
Jackson pointed reverse headstock. Real owner reports specifically describe aftermarket locking tuner screw holes not lining up with the factory pilot holes on this headstock style even when post diameter matches.
Help confirm this fit
This page has 14 open questions
If you have fitted any of these to this Grover Rotomatic Locking Tuners (6-in-line Chrome), tell us what you found and we'll update the data.