Schaller GrandTune Single Guitar Tuning Machine
The Schaller GrandTune represents an advanced synthesis of vintage open-gear architecture and cutting-edge manufacturing precision. Engineered with a 1:18 gear ratio, this classical open-gear tuning machine delivers ultra-smooth rotation and dependable tuning stability without relying on synthetic coatings.
Ultra-precise contact surfaces eliminate polymer wear while ensuring direct acoustic resonance transfer directly into the headstock. Permanently sealed and locked screw joints guarantee lasting, wear-free performance that preserves tonal clarity across years of professional play.
Crafted to standard production instrument specifications, the GrandTune allows for straightforward installation or retrofitting. Recessed screw holes facilitate secure mounting, optimal string tension management, and superior harmonic transfer.
| Model | GrandTune Single Tuning Machine (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 | 2 x countersunk mounting screws (M2.2 x 11) per single unit |
| Press-in Bushing | Hexagonal bushing: 0.35 in outer diameter, 0.24 in inner diameter (fits 0.24 in post) |
| Design | Open-gear |
