Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune single guitar tuning machine offers an optimal combination of vintage-inspired open-gear architecture and refined modern engineering. Designed with an open gear and worm drive mechanism, it delivers a precise 1:18 gear ratio for exceptionally smooth and accurate tuning stability across acoustic, classical, and electric instruments.
Engineered without synthetic or polymer coatings, the tuner achieves superior contact surface precision and wear-free stick-slip performance while maximizing acoustic resonance transfer directly through the instrument's headstock. Permanently locked, sealed screw joints ensure long-term, maintenance-free operation under heavy playing conditions.
Featuring standard dimensions compatible with production instruments, this tuner incorporates countersunk mounting screw holes for firm coupling and optimal tonal transmission. Each single unit includes mounting screws and a hexagonal press-in bushing tailored for solid headstocks.
Brand
Schaller
Model
GrandTune Einzelmechanik (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Design
Open-Gear
Mounting Type
Screw-in with Press-in Bushing
Included Screws
2 x M2.2 x 0.43 in
Included Bushing Outer Diameter
0.35 in
Included Bushing Inner Diameter
0.24 in
Button Dimensions (Butterbean)
0.8 x 0.54 x 0.41 in
Button Dimensions (Standard)
0.69 x 0.54 x 0.24 in
Unit Weight
0.04 lb (Koa), 0.04 lb (Perloid), 0.04 lb (Galalith, Ebony), 0.05 lb (Snakewood), 0.06 lb (Butterbean)