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.
Tuner
Graph Tech Graph Tech Ratio Machine Heads (6-in-line, Non-Staggered)
Innovative tuning machines that assign a unique gear ratio to each string for uniform tuning response.
1 guitar checked: 1 likely drop-in.
Drop a hero product shot
Where to buy
Amazon
Price not publishedIn stock
Being re-verified
Part specs
Tuner hole size
10mm
ConfirmedMounting pattern
Two-pin casing, usable as-is or with Graph Tech's optional InvisoMatch mounting plates. Non-staggered, all posts equal height (PRL-8721/8731 line), for 6-in-line headstocks that tilt back (e.g. Gibson Explorer). Confirmed via Graph Tech's own listing and an owner review explicitly noting the posts are not staggered.
ConfirmedGear ratio
Not a single ratio by design, RATIO tuners assign a unique gear ratio to each string position so one turn produces the same pitch change on every string, confirmed via Graph Tech's own manufacturer spec sheet
ConfirmedGuitars we've checked
1 guitar checked: 1 likely drop-in.
Help improve this data
Nothing is flagged as an open question here right now. If you have fitted something to this Graph Tech Ratio Machine Heads (6-in-line, Non-Staggered) that we haven't covered, send it in.