Grover's classic sealed-gear Rotomatic tuner on a modern 10mm post, a common upgrade for guitars that already have modern-spec tuner holes.
19 guitars checked: 12 likely drop-in, 4 needs verification, 3 requires modification.
Where to buy
Andertons
Checked 29 days ago
Tuner hole size
10mm
ConfirmedGear ratio
14:1
ConfirmedMounting pattern
Single rear mounting screw with a threaded hex peghead bushing.
19 guitars checked: 12 likely drop-in, 4 needs verification, 3 requires modification.
A direct swap for the stock tuners, no reaming needed. This style of 3-per-side set works the same for left and right-handed guitars.
This guitar's tuner holes are confirmed at 10mm, matching the standard modern Grover Rotomatic bore directly. This is a 3-per-side headstock, and standard 3-per-side tuner sets are not manufactured as separate left and right-handed SKUs the way 6-in-line sets are, the same set splits three-and-three regardless of which way the guitar faces.
Matches this guitar's confirmed 10mm tuner holes. Your stock tuner brand may vary by year, but the hole size is confirmed either way.
This guitar's tuner hole size is confirmed at 10mm, matching this tuner directly. Stock tuner brand varies by production year (Vintage Deluxe, Grover, or Kluson), but hole size is confirmed regardless of which shipped.
Matches this guitar's confirmed 10mm tuner holes.
This guitar's tuner hole size is confirmed at 10mm, matching this tuner directly.
Matches this guitar's confirmed 10mm tuner holes, the same tuner family it already ships with.
This guitar's tuner hole size is confirmed at 10mm, matching Gibson's own spec sheet listing Grover Rotomatics as stock.
A direct swap for the stock tuners, no reaming needed.
This guitar's tuner holes are confirmed at 10mm, matching the standard modern Grover Rotomatic bore directly.
Matches this guitar's confirmed 10mm tuner holes, the same tuner family it already ships with.
This guitar's tuner hole size is confirmed at 10mm, matching this tuner directly. This guitar's stock tuners are already a locking Grover Rotomatic, so this is a same-family swap.
Matches this guitar's confirmed 10mm tuner holes. This headstock has three tuners a side either way, so there is no left or right-handed version to worry about here.
This guitar's tuner hole size is confirmed at 10mm, matching this tuner directly. A 3-per-side Gibson-style headstock is symmetric, so individual sealed tuners like this one have no handedness of their own, unlike a 6-in-line headstock where mirrored parts matter.
Fits the existing 10mm tuner holes on this guitar without any drilling.
The 60s reissue specifically (as distinct from the Standard 50s) is consistently reported across multiple sources as shipping with modern Grover-style tuners on 10mm holes with screw-in bushings, confirmed by several My Les Paul Forum threads discussing this reissue by name. Not a genuine source conflict, the earlier hedge here was inaccurate.
A direct swap for the stock tuners, no reaming needed.
This guitar's tuner holes are confirmed at 10mm, matching the standard modern Grover Rotomatic bore directly. Tuner hole size is unrelated to the bridge spacing dispute.
Matches the tuner holes already on this guitar. A straightforward tuner upgrade, no reaming needed.
This guitar's tuner holes are the modern 10mm Rotomatic-standard size used across current Gibson SG models, matching Grover's 102 line directly.
A direct swap for the stock tuners, no reaming needed. Unlike 6-in-line tuners, this style of 3-per-side set works the same for left and right-handed guitars.
This guitar's tuner holes are confirmed at 10mm, matching the standard modern Grover Rotomatic bore directly. Unlike 6-in-line Fender-style tuner sets, standard 3-per-side Gibson-style tuner sets are not manufactured as separate left and right-handed SKUs, the same six-piece set splits three-and-three regardless of which way the guitar faces.
Owners consistently report this as a clean drop-in replacement for the stock tuners, no reaming or drilling needed.
Multiple Streamliner owners report the Grover 102-18N dropping in perfectly on the G2622, at the guitar's standard 10mm post holes.
Likely matches the standard 10mm bore most current Gibsons use, but this guitar's exact hole size hasn't been independently confirmed. Measure before buying.
This guitar's exact tuner hole size has not been independently confirmed. Matches the well-corroborated 10mm standard seen across most current Gibson USA models, but not specifically measured on this one.
Help confirm this fit
Likely matches the standard 10mm bore most current Gibsons use, but this guitar's exact hole size hasn't been independently confirmed. Measure before buying.
This guitar's exact tuner hole size has not been independently confirmed. Matches the well-corroborated 10mm standard seen across most current Gibson USA models, but not specifically measured on this one.
Help confirm this fit
Likely matches the standard 10mm bore most current Gibsons use, but this guitar's exact hole size hasn't been independently confirmed. Measure before buying.
This guitar's exact tuner hole size has not been independently confirmed. Matches the well-corroborated 10mm standard seen across most current Gibson USA models, but not specifically measured on this one.
Help confirm this fit
Likely matches the standard 10mm bore most current Gibsons use, but this guitar's exact hole size hasn't been independently confirmed. Measure before buying.
This guitar's exact tuner hole size has not been independently confirmed. Matches the well-corroborated 10mm standard seen across most current Gibson USA models, but not specifically measured on this one.
Help confirm this fit
Needs the tuner holes reamed out to 10mm before these will fit.
Grover Rotomatics use 10mm posts; Casino ships with vintage-spec holes (measured ~8.3-8.4mm on a related 2021 Casino Coupe, standard Casino not independently measured), reaming almost certainly required.
Help confirm this fit
Needs the tuner holes reamed out to 10mm before these will fit.
Grover Rotomatics use 10mm posts; the Casino ships with vintage-spec holes (measured ~8.3-8.4mm on a related 2021 Casino Coupe, standard Casino not independently measured). This tuner hole size is unaffected by the 2023 bridge hardware change, so the same reaming requirement applies as on the earlier Casino.
Help confirm this fit
These need larger tuner holes than this guitar has stock. Expect the holes to be reamed out for a proper fit, not a straight drop-in.
Grover's Rotomatic line is built around the modern 10mm bushing standard. This guitar's factory tuner holes are vintage-spec at roughly 8.8mm, so fitting these means reaming the holes out and refitting new bushings.
Help confirm this fit
If you have fitted any of these to this Grover 102 Rotomatic Tuners, tell us what you found and we'll update the data.
