Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines refined vintage styling with ultra-precise tuning behavior and smooth mechanical performance. Featuring an open-gear architecture with a precision-machined worm gear, it delivers an 1:18 gear ratio for accurate and durable pitch adjustment on acoustic, classical, and electric instruments.
Built without synthetic polymer coatings, its ultra-precise contact surfaces generate optimal stick-slip properties free from wear or degradation. Permanently locked, sealed screw joints ensure maintenance-free reliability, while countersunk screw holes provide firm contact and optimal acoustic resonance transfer directly into the headstock.
Engineered to standard instrument dimensions for straightforward installation and replacement, this tuning machine includes matching countersunk mounting screws and precision hexagonal press-in bushings for solid headstocks.
Brand
Schaller
SKU
10511023.42.41
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)
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 (Other Buttons)
Bushing Outer Diameter
0.35 in
Bushing Inner Diameter
0.24 in
Total Weight
0.67 lb