Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines classic vintage styling with modern precision engineering. Featuring an open-gear design with a worm gear drive, it delivers smooth performance and reliable tuning stability for acoustic and classic guitars.
Equipped with an 18:1 gear ratio, this tuning machine enables exceptionally fine adjustments and long-lasting durability. The coating-free contact surfaces and permanently sealed screw joints provide maintenance-free operation and optimal acoustic resonance with your instrument's headstock.
Designed to fit standard production instrument dimensions, it includes countersunk screw holes and high-precision components to ensure direct sound transmission and straightforward installation or replacement.
| Brand | Schaller |
| Model | GrandTune (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Design | Open Gear |
| Weight per Tuner | 0.63 oz (Koa), 0.67 oz (Perloid), 0.71 oz (Galalith, Ebony), 0.74 oz (Snakewood), 0.88 oz (Butterbean) |
| Button Dimensions (Butterbean) | 0.80 x 0.54 x 0.41 in |
| Button Dimensions (Standard) | 0.69 x 0.54 x 0.24 in |
| Included Hardware | 2 mounting screws (M2.2 x 11 mm), 1 hexagonal press-in bushing (for solid headstock versions) |



















