Schaller GrandTune Single Guitar Tuning Machine
The Schaller GrandTune combines vintage aesthetics with modern tuning precision and smooth operation. Designed as an open-gear tuner with a 1:18 gear ratio, it provides exact tuning control and long-lasting durability without requiring synthetic polymer coatings.
Constructed with ultra-precise contact surfaces to eliminate stick-slip, each machine head features permanently locked and sealed screw connections for maintenance-free reliability. Countersunk screw holes ensure secure fastening and resonance transfer to your instrument.
Engineered to standard instrument dimensions for straightforward installation and replacement, the tuning machine includes countersunk mounting screws and a hexagonal press-in bushing for solid headstock mounting.
| 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 (Perloid), 0.71 oz (Galalith, Ebony), 0.74 oz (Snakewood), 0.88 oz (Butterbean) including press-in bushing |
| Product Weight | 0.11 lb |
| 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 Screw Dimensions | M2.2 x 0.43 in (M2.2 x 11 mm) |
| Bushing Outer Diameter | 0.35 in (8.8 mm) |
| Bushing Inner Diameter | 0.24 in (6.1 mm) |
| Post Compatibility | 0.24 in (6.0 mm) |





















