Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines refined vintage styling with modern precision engineering, featuring an open-gear design with a worm gear mechanism. Built without synthetic polymer coatings, its ultra-precise contact surfaces provide stick-slip-free movement while preserving instrument resonance.
With a precise 1:18 gear ratio, this single tuning machine ensures smooth, exact tuning and long-term tuning stability. Permanently locked and sealed screw joints deliver completely wear-free and maintenance-free operation across years of play.
Designed to standard instrument dimensions for straightforward installation or replacement, it includes countersunk screw holes that ensure firm mounting and optimal acoustic tone transfer.
Brand
Schaller
Model
GrandTune (GT-Single)
Product Type
Single Guitar Tuning Machine
Gear Ratio
1:18
Design
Open Gear
Included Hardware
2 mounting screws (M2.2 x 11), 1 hexagonal press-in bushing (solid headstock version)
Bushing Outer Diameter
0.35 in
Bushing Inner Diameter
0.24 in
Compatible Post Diameter
0.24 in