Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines refined vintage styling with precise tuning response and smooth operation. Designed as a perfected open-gear tuning machine, it features precision worm gears and open architecture tailored for acoustic and electric guitars.
Equipped with an 1:18 gear ratio, the mechanism delivers exceptional tuning accuracy, stability, and durability. By avoiding synthetic coatings, it functions as a fully resonant assembly that directly enhances instrument vibration and tone transmission.
Ultra-precise fittings and permanently sealed screw joints eliminate play and wear for reliable, maintenance-free performance. Its standardized dimensions allow for straightforward installation and direct replacement on solid headstocks.
| Brand | Schaller |
| Model | GT-Single |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.1 lb |
| Weight per Machine | 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) |
| Included Hardware | 2 mounting screws (M2.2 x 11 mm), 1 hexagonal press-in bushing (0.35 in OD, 0.24 in ID) |





















