Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines refined vintage styling with modern precision engineering. Designed with an open-gear configuration and worm gear drive, it delivers exceptionally smooth turning action and reliable tuning stability. The precise 1:18 gear ratio ensures fine-tuned adjustment and long-lasting mechanical durability across a wide range of playing styles.
Built without synthetic polymer coatings, the contact surfaces achieve optimal stick-slip properties that resist wear and degradation over time. The permanently locked, sealed screw joints provide maintenance-free performance, while recessed mounting screw holes ensure solid contact and optimal acoustic resonance transfer through the headstock.
Engineered to standard instrument dimensions for straightforward replacement or direct installation, this single tuning machine is suitable for acoustic, electric, and classical instruments. Each unit includes mounting hardware engineered to maintain precise alignment and smooth operation without mechanical friction.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Design
Open-gear
Button Dimensions
0.8 x 0.5 x 0.4 in (Butterbean), 0.7 x 0.5 x 0.2 in (Other buttons)
Weight
0.6 oz (Koa), 0.7 oz (Perloid), 0.7 oz (Galalith, Ebony), 0.7 oz (Snakewood), 0.9 oz (Butterbean)
Included Hardware
2 x countersunk mounting screws (M2.2 x 11), 1 x hexagonal press-in bushing (for solid headstock)
Bushing Outer Diameter
0.3 in
Bushing Inner Diameter
0.2 in