Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines stylish vintage open-gear design with ultra-precise tuning behavior and smooth performance. Engineered with an open gear and worm design, it provides an exceptional 1:18 gear ratio for superior accuracy and lasting reliability.
Featuring high-precision contact surfaces without synthetic polymer coatings, this tuning machine delivers optimal stick-slip action free of wear or aging. Permanently locked, sealed screw joints ensure maintenance-free performance while preserving resonance across your instrument.
Designed to fit standard production instrument dimensions, it allows for seamless installation and replacement. Countersunk screw holes ensure a firm hold and solid acoustic coupling with the headstock.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Design
Open Gear
Bushing Outer Diameter
0.35 in
Bushing Inner Diameter
0.24 in
Compatible Post Diameter
0.24 in
Button Dimensions (Butterbean)
0.80 x 0.54 x 0.41 in
Button Dimensions (Standard)
0.69 x 0.54 x 0.24 in
Mounting Screws Included
2x M2.2 x 11 mm per machine