Schaller GrandTune Guitar Tuning Machine
The Schaller GrandTune combines refined vintage styling with ultra-precise tuning behavior and smooth performance. Designed as an open-gear tuner with a worm gear mechanism, it delivers a precise 1:18 gear ratio for exceptional accuracy and lasting tuning stability.
Crafted without synthetic polymer coatings, its ultra-precise contact surfaces create frictionless stick-slip performance without wear or aging. Permanently locked, sealed screw joints ensure maintenance-free reliability while preserving instrument resonance and tone transfer.
Designed to match standard production instrument dimensions for straightforward installation and replacement, each single unit features countersunk screw holes and includes dedicated mounting hardware and press-in hexagonal bushings for solid headstock setups.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.04 lb (Koa), 0.04 lb (Perloid), 0.04 lb (Galalith, Ebony), 0.05 lb (Snakewood), 0.06 lb (Butterbean) including bushing |
| Button Dimensions | 0.8 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons) |
| Mounting Screws | 2 x countersunk mounting screws (M2.2 x 11 mm) |
| Bushing | 1 x hexagonal press-in bushing for solid headstocks, outer diameter 0.35 in (inner diameter 0.24 in, fits 0.24 in post) |
| Product Weight | 0.11 lb |
