Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune delivers an optimal combination of vintage aesthetics, precise tuning behavior, and ultra-smooth operation. Designed as a perfected open-gear tuning machine, it features an exposed gear and worm drive engineered for exceptional performance.
An 18:1 gear ratio provides precise micro-tuning stability and long-lasting durability. Built entirely without synthetic polymer coatings, the precision contact surfaces produce direct acoustic resonance with the instrument while maintaining frictionless movement without wear or aging.
Engineered to standard instrument dimensions for straightforward replacement and installation, each unit includes permanently locked, sealed screw joints and countersunk screw holes to ensure rigid attachment and maximum sound transmission.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Design | Open-gear |
| Weight per Single Tuner | 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) |
| Mounting Screws | 2 countersunk mounting screws per tuner (M2.2 x 11) |
| Bushing | Hexagonal press-in bushing (0.35 in outer diameter, 0.24 in inner diameter) |
