Schaller GrandTune Single Guitar Tuning Machine
The Schaller GrandTune combines stylish vintage design with precise tuning behavior and velvet-smooth performance. This refined open-gear tuning machine features an open gear and worm gear design engineered for maximum reliability.
Its 1:18 gear ratio provides unsurpassed precision and long-lasting durability. By omitting synthetic polymer coatings, the tuner acts as a perfectly resonating unit on any instrument, delivering exceptional sound quality and tuning stability without wear or aging.
Permanently locked, sealed, and covered screw joints ensure maintenance-free performance, while countersunk screw holes offer a secure hold and optimal acoustic transmission.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight per Single Tuner | 0.63 oz (Koa), 0.67 oz (Pearloid), 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) |
| Mounting Screws Included | 2 x M2.2 x 11 mm countersunk screws |
| Included Bushing | Hexagonal press-in bushing (0.35 in OD, 0.24 in ID) |



















