Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines refined vintage styling with precise tuning accuracy and velvety-smooth performance. Built as an open-gear tuner with an exposed worm gear mechanism, it delivers classic aesthetics without sacrificing modern engineering excellence.
A precision 1:18 gear ratio provides exceptional tuning stability, longevity, and control. Built completely free of synthetic coatings on its wear-free contact points, the GrandTune promotes optimal instrument resonance and seamless acoustic coupling.
Featuring permanently locked, sealed screw connections and countersunk mounting holes, this tuning machine ensures zero maintenance and flawless vibrational transfer across standard series instruments.
Brand
Schaller
Product Type
Guitar Tuning Machine
Model
GrandTune Single (GT-Single)
Gear Ratio
1:18
Weight per Single Tuner
0.63 oz (Koa), 0.67 oz (Perloid), 0.71 oz (Galalith, Ebony), 0.74 oz (Snakewood), 0.88 oz (Butterbean) including bushing
Button Dimensions (W x H x D)
0.80 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons)
Mounting Screws Included
2 x Countersunk Screws (M2.2 x 11 mm)
Included Bushing
Hexagonal press-in bushing, 0.35 in (8.8 mm) outer diameter, 0.24 in (6.1 mm) inner diameter