Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines vintage aesthetic design with precise tuning action and smooth performance. Built as an open-gear tuner with a precision worm drive, it delivers reliable stability and enhanced instrument resonance without synthetic coatings.
Featuring an 18:1 gear ratio, the GrandTune provides ultra-fine tuning precision and long-lasting durability. Its precision-engineered contact surfaces and permanently sealed screw joints ensure wear-free and maintenance-free operation across years of play.
Designed to fit standard serial instrument headstock dimensions for straightforward installation and replacement, this tuning machine includes countersunk screw holes for solid mounting and direct acoustic transmission.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Configuration
Open-Gear
Mounting Type
Screw-mount with countersunk screw holes
Included Hardware
2 mounting screws (M2.2 x 11), 1 hexagonal press-in bushing (where applicable)
Button Dimensions (Butterbean)
0.8 x 0.5 x 0.4 in
Button Dimensions (Standard)
0.7 x 0.5 x 0.2 in
Weight per Unit
0.04 lb (Koa), 0.04 lb (Perloid), 0.04 lb (Galalith, Ebony), 0.05 lb (Snakewood), 0.06 lb (Butterbean)