Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines classic open-gear vintage aesthetics with precision modern engineering. Designed with an ultra-precise 1:18 gear ratio, it delivers smooth tuning stability and velvety performance for premium instruments.
Built without synthetic polymer coatings, the contact surfaces offer optimal stick-slip performance that resists wear and aging over time. Permanently locked, sealed screw joints ensure maintenance-free reliability and direct acoustic resonance transfer.
Engineered to standard instrument dimensions for straightforward installation and replacement, this tuning machine features countersunk mounting holes for a secure fit and excellent sound transmission.
| Brand | Schaller |
| Model | GrandTune (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 bushing |
| Button Dimensions (W x H x D) | 0.8 x 0.5 x 0.4 in (Butterbean), 0.7 x 0.5 x 0.2 in (all other buttons) |
| Mounting Screws Included | 2 x Countersunk screws (M2.2 x 11 mm) |
| Press-in Bushing Outer Diameter | 0.3 in (8.8 mm) |



















