Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines vintage aesthetic styling with modern engineering, featuring an open-gear design and precision worm gear. Crafted without synthetic polymer coatings, it enables natural acoustic resonance while delivering smooth tuning performance.
A precise 1:18 gear ratio ensures accurate tuning stability and extended mechanical durability. Its wear-free construction, sealed joints, and countersunk screw holes provide permanent hold and direct tone transmission across serial instrument headstocks.
Each single tuning machine includes mounting screws and a hexagonal press-in bushing for solid headstock installations, making it an ideal upgrade or replacement hardware component.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight per 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) |
| Product Weight | 0.11 lb |
| Included Screws | 2 x Countersunk Mounting Screws (M2.2 x 11 mm) |
| Included Bushing | Hexagonal press-in bushing (0.35 in outer diameter, 0.24 in inner diameter) |



















