Schaller GrandTune Single Guitar Tuning Machine
The Schaller GrandTune combines classic vintage styling with open gear architecture and precision performance. Featuring a 1:18 gear ratio, this single tuning machine provides exceptionally accurate tuning stability and ultra-smooth operation.
Constructed without synthetic coatings, the tuning machine ensures optimal instrument resonance and direct acoustic transfer. Ultra-precise contact surfaces eliminate stick-slip motion, providing wear-free performance and long-lasting durability.
Designed to fit standard instrument dimensions for straightforward installation or replacement, the unit includes permanently locked, sealed screw joints and countersunk screw holes for secure headstock mounting.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Design | Open Gear |
| Weight per Machine | 0.04 lb (Koa), 0.04 lb (Perloid), 0.04 lb (Galalith, Ebony), 0.05 lb (Snakewood), 0.06 lb (Butterbean) including bushing |
| Button Dimensions (W x H x D) | 0.8 x 0.5 x 0.4 in (Butterbean), 0.7 x 0.5 x 0.2 in (all other buttons) |
| Included Screws | 2 x countersunk mounting screws (M2.2 x 11) |
| Included Bushing | 1 x hexagonal press-in bushing for solid headstocks, outer diameter 0.35 in, inner diameter 0.24 in |





















