Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines refined vintage styling with precise tuning response and smooth performance. Engineered as a perfected open-gear tuning machine, it features precision gear and worm architecture designed for optimal resonance and stability.
A 1:18 gear ratio provides pinpoint accuracy and long-term durability. Built without synthetic coatings, the tuning machine allows optimal acoustic coupling and acoustic performance across standard headstocks.
Engineered to standard instrument dimensions for straightforward installation and replacement, each tuner includes countersunk screw holes and permanently sealed mechanical connections for maintenance-free operation.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.1 lb |
| 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) |
| 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) |
| Bushing Outer Diameter | 0.35 in |
| Bushing Inner Diameter | 0.24 in |





















