Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines refined vintage styling with precise tuning response and smooth operation. Designed as an open-gear tuning machine, it features an 18:1 gear ratio engineered for lasting durability and exacting tuning accuracy.
Crafted without synthetic polymer coatings, the GrandTune creates optimal stick-slip properties across ultra-precise contact surfaces to prevent wear and aging. Permanently locked, sealed joints ensure zero maintenance and play-free performance over time.
Engineered to standard instrument dimensions for straightforward installation and replacement, this tuning machine includes countersunk screw holes that ensure rigid mounting and excellent acoustic transfer to the headstock.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.11 lb |
| Single Tuner Weight | 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 (Other Buttons) |
| Bushing Outer Diameter | 0.35 in (8.8 mm) |
| Bushing Inner Diameter | 0.24 in (6.1 mm) |



















