Schaller GrandTune Single Guitar Tuning Machine
The Schaller GrandTune Single Guitar Tuning Machine combines vintage open-gear aesthetics with precise modern engineering. Designed with an 1:18 gear ratio, it provides exceptionally smooth action, accurate tuning stability, and lasting durability for premium instruments.
Built without synthetic polymer coatings, the GrandTune features ultra-precise contact surfaces and permanently locked, sealed screw joints that ensure wear-free and maintenance-free performance while allowing pure acoustic resonance.
Engineered to standard instrument dimensions for straightforward replacement or new builds, each unit includes mounting screws and a hexagonal press-in bushing for solid headstock installations.
| Brand | Schaller |
| Model | GrandTune Einzelmechanik (GT-Single) |
| Model Number | GT-Single |
| Gear Ratio | 1:18 |
| Tuner Type | Open Gear Single Tuning Machine |
| 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 (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) |
| Product Weight | 0.11 lb |
| Included Hardware | 2 x countersunk mounting screws (M2.2 x 11), 1 x hexagonal press-in bushing (for solid headstocks) |





















