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
Schaller Schaller M6 Locking Tuners, 6-in-line
A locking tuner upgrade built on Schaller's long-running M6 design, offering an 18:1 gear ratio and a rear thumbscrew locking mechanism for fast, stable restrings.
24 guitars checked: 12 likely drop-in, 12 needs verification.
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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
2-pin mount plus a single rear mounting screw (current M6 Pin design).
Installation notes
Requires 10mm diameter tuner pegholes. Drop into an existing 10mm-bored 6-in-line headstock with no drilling. Always confirm your guitar's actual hole size before ordering.
Guitars we've checked
24 guitars checked: 12 likely drop-in, 12 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.
Should swap straight into the existing tuner holes, no reaming needed.
Why we say this
Explorer uses a 6-in-line, non-staggered-post headstock rather than Gibson's usual 3+3.
Schaller specify a 10mm peghole for these, which is what this guitar has. No drilling needed.
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. Schaller's and StewMac's own spec sheets both state the M6 requires a 10mm peghole, so this is a confirmed size match on both sides.
Schaller specify a 10mm peghole for these, which is what this guitar has. No drilling needed.
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. Schaller's and StewMac's own spec sheets both state the M6 requires a 10mm peghole, so this is a confirmed size match on both sides.
Fits the existing 10mm tuner holes without any drilling.
Why we say this
Guitar's stock die-cast tuners confirmed at 10mm bore, consistent with the well corroborated MIJ Gotoh-made standard across the Ibanez RG/RGA family (multiple independent forum reports). Schaller M6 requires 10mm pegholes per Schaller and StewMac spec sheets.
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
Schaller specify a 10mm tuner hole for these. That size hasn't been confirmed on this guitar, and its stock split-shaft tuners suggest it may be smaller. Measure before buying.
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. Schaller's and StewMac's own spec sheets both state the M6 requires a 10mm peghole. 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.
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 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
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 12 open questions
If you have fitted any of these to this Schaller M6 Locking Tuners, 6-in-line, tell us what you found and we'll update the data.