Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines refined vintage styling with precise, ultra-smooth tuning performance in an open-gear design. Built with an open gear and worm architecture, it features a 1:18 gear ratio that delivers exceptional accuracy, tuning stability, and long-term durability without relying on synthetic coatings.
Engineered with ultra-precise contact surfaces and permanently locked, sealed screw joints, this tuning machine provides wear-free and maintenance-free operation. Countersunk screw holes ensure secure mounting and optimal acoustic resonance transfer directly into the headstock.
Designed to fit standard production instruments, it allows for straightforward installation and replacement. Single units for solid headstocks include countersunk mounting screws and a hexagonal press-in bushing for reliable anchoring.
| Brand | Schaller |
| Model | GrandTune Einzelmechanik (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Design | Open Gear |
| Weight per Single Tuner | 0.04 lb (Koa), 0.04 lb (Perloid), 0.04 lb (Galalith, Ebony), 0.05 lb (Snakewood), 0.06 lb (Butterbean) including bushing |
| Button Dimensions (WxHxD) | 0.80 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons) |
| Mounting Screws | M2.2 x 11 mm (0.43 in) |
| Bushing Outer Diameter | 0.35 in (8.8 mm) |
| Bushing Inner Diameter | 0.24 in (6.1 mm) |
