Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines stylish vintage aesthetics with ultra-precise tuning response and velvet-smooth performance. Built as a perfected open-gear tuning machine, it features an exposed worm gear and gear wheel architecture designed for lasting reliability.
A precision 1:18 gear ratio delivers fine adjustment control and remarkable tuning stability. Designed without synthetic polymer coatings, the tuner provides pure acoustic resonance across the headstock while maintaining wear-free operation through ultra-precise contact surfaces.
Permanently locked and sealed screw joints provide maintenance-free performance on serial instruments and custom builds. Countersunk screw holes ensure secure mounting and optimal acoustic transfer directly into the wood.
Brand
Schaller
Product Type
Guitar Tuning Machine
Model
GrandTune Single (GT-Single)
Gear Ratio
1:18
Weight per Unit
0.63 oz (Koa), 0.67 oz (Perloid), 0.71 oz (Galalith, Ebony), 0.74 oz (Snakewood), 0.88 oz (Butterbean)
Button Dimensions
0.8 x 0.5 x 0.4 in (Butterbean), 0.7 x 0.5 x 0.2 in (all other buttons)
Bushings Outer Diameter
0.35 in
Bushings Inner Diameter
0.24 in
Mounting Screws
2 x M2.2 x 11 mm per single tuner