Schaller GrandTune Single Guitar Tuning Machine
The Schaller GrandTune Single delivers a refined combination of vintage open-gear aesthetics and modern high-precision engineering. Crafted with an exact 1:18 gear ratio, this classical open-gear tuning machine provides ultra-precise, velvet-smooth tuning stability and long-lasting durability.
Built without synthetic coatings, the GrandTune creates an optimal resonating connection with the instrument wood. Ultra-precise contact surfaces and permanently sealed screw joints ensure wear-free, zero-maintenance performance and exceptional acoustic energy transfer.
Engineered to standard instrument dimensions for effortless installation and direct replacement, each single unit includes premium mounting hardware and press-in hex bushings for solid headstock configurations.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Gear Ratio | 1:18 |
| Weight per Single Unit | 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) | 0.8 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in all other buttons |
| Included Bushing Size | 0.35 in OD, 0.24 in ID (fits 0.24 in post) |
| Mounting Screws | M2.2 x 11 mm (0.09 x 0.43 in) |
| Design | Open Gear |
