Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines classic vintage styling with modern precision engineering and smooth tuning response. Designed as an open-gear tuner with a worm gear mechanism, it delivers dependable stability without relying on synthetic coatings, allowing the instrument to resonate naturally.
Featuring an ultra-precise 1:18 gear ratio, this tuning machine provides smooth, accurate adjustments and long-lasting durability. Its permanently locked, sealed screw joints ensure wear-free and maintenance-free performance across years of playing.
Engineered to standard instrument dimensions for straightforward installation or replacement, it includes countersunk screw holes that ensure solid mounting and optimal acoustic transfer to the headstock.
| Brand | Schaller |
| Model | GrandTune Einzelmechanik (GT-Single) |
| Gear Ratio | 1:18 |
| 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) including press-in bushing |
| 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 Type | Screw-in with press-in bushing |
| Bushing Outer Diameter | 0.35 in |
| Bushing Inner Diameter | 0.24 in |
| Compatible Post Diameter | 0.24 in |



















