Schaller GrandTune Single Guitar Tuning Machine
The Schaller GrandTune represents the ultimate fusion of vintage design, precise tuning accuracy, and velvet-smooth performance. Built with an open-gear configuration and worm screw architecture, this classic tuner eliminates synthetic coatings to form a perfectly resonant unit on any instrument.
Equipped with a precise 1:18 gear ratio, the mechanism provides long-lasting tuning stability and exact pitch adjustment. Ultra-precise contact surfaces operate without polymer coatings to ensure seamless stick-slip friction free of wear and material aging.
Permanently locked and sealed screw joints deliver maintenance-free operation across years of use. Designed to match standard instrument dimensions, the assembly includes countersunk screw holes for solid mounting and direct acoustic resonance transfer.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Design | Open Gear |
| 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) with bushing |
| Butterbean Button Dimensions (W x H x D) | 0.8 x 0.54 x 0.41 in |
| Standard Button Dimensions (W x H x D) | 0.69 x 0.54 x 0.24 in |
| Press-In Bushing Outer Diameter | 0.35 in (8.8 mm) |
| Press-In Bushing Inner Diameter | 0.24 in (6.1 mm) |
| Mounting Screws | 2 x M2.2 x 11 mm |
