Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune combines stylish vintage open-gear design with ultra-precise tuning performance and velvety smooth action. Built with an open gear and threaded worm mechanism, it delivers classic aesthetics without sacrificing modern mechanical engineering.
Featuring a precise 1:18 gear ratio, this tuning machine provides unmatched accuracy and long-term tuning stability. The design omits synthetic coatings in favor of ultra-precise contact surfaces, ensuring optimal resonance transfer across the instrument headstock.
Permanently locked and sealed screw connections deliver wear-free and maintenance-free operation over extended use. Engineered to standard instrument specifications, it allows straightforward installation and replacement on solid or slotted headstocks.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Design
Open Gear
Included Hardware
2 mounting screws (M2.2 x 11), 1 hexagonal press-in bushing (for solid headstocks)
Bushing Outer Diameter
0.3 in
Bushing Inner Diameter
0.2 in
Post Diameter Compatibility
0.2 in
Button Dimensions (Butterbean)
0.8 x 0.5 x 0.4 in
Button Dimensions (Standard)
0.7 x 0.5 x 0.2 in