Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines vintage styling with precision tuning performance and ultra-smooth operation. Designed as an open-gear tuner with a threaded worm gear, it delivers exceptional resonance and feel across a variety of stringed instruments.
Featuring an 1:18 gear ratio, this machine head provides pinpoint tuning accuracy and long-lasting durability. The polymer-free contact surfaces and precise fittings eliminate synthetic coating wear, allowing the mechanism to vibrate in harmony with the guitar headstock.
Equipped with permanently locked, sealed screw joints for zero-maintenance performance, the GrandTune is built to standard instrument dimensions for straightforward installation and direct replacement.
| Brand | Schaller |
| Model | GrandTune (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| 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 (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 Mounting Screws | 2 x countersunk mounting screws (M2.2 x 11) |
| Included Bushing | 1 x hexagonal press-in bushing (outer diameter 0.35 in, inner diameter 0.24 in for 0.24 in post; solid headstock models) |



















