Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines refined vintage styling with modern precision engineering and smooth performance. Featuring an open-gear design with a finely cut worm gear, this classic tuning machine delivers an exact 1:18 gear ratio for stable, nuanced tuning. Constructed without synthetic polymer coatings, it enables direct contact and optimum acoustic resonance across the entire headstock.
Ultra-precise friction surfaces and permanently locked, sealed screw joints ensure long-lasting, wear-free operation without maintenance requirements. Countersunk mounting holes provide a firm anchor to instrument wood for enhanced vibration transfer and stability. Designed to match standard production instrument dimensions, it integrates smoothly into both new builds and vintage restorations.
Equipped with specialized press-in bushings for solid headstock installations, the GrandTune keeps the drive mechanism precisely aligned over years of play. The open-gear architecture offers a timeless aesthetic while guaranteeing accurate, noise-free tuning response.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Model | GrandTune Single (GT-Single) |
| Gear Ratio | 1:18 |
| Design | Open Gear |
| Weight per Unit | 0.63 oz (Koa), 0.67 oz (Perloid), 0.71 oz (Galalith, Ebony), 0.74 oz (Snakewood), 0.88 oz (Butterbean) |
| Button Dimensions | 0.80 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons) |
| Mounting Screws | 2x M2.2 x 11 mm |
| Bushing Outer Diameter | 0.35 in (8.8 mm) |
