Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune combines sophisticated vintage aesthetics with precise tuning performance and ultra-smooth operation. Designed as a perfected classic open-gear tuning machine, it features an exposed gear and worm drive mechanism crafted without synthetic coatings for pure resonance and longevity.
Equipped with an 18:1 gear ratio, the GrandTune provides exceptional tuning accuracy and stability. Its high-precision contact surfaces ensure flawless stick-slip behavior without wear or aging, while permanently locked and sealed screw joints deliver maintenance-free reliability over years of use.
Engineered to standard instrument dimensions for straightforward installation and replacement, this tuning machine includes countersunk mounting screw holes for firm coupling and optimal acoustic transfer. Each solid headstock unit is supplied with two countersunk mounting screws (M2.2 x 11) and an 8.8 mm (0.3 in) hexagonal press-in bushing.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Design
Open-gear
Included Bushing Outer Diameter
0.3 in
Included Bushing Inner Diameter
0.2 in
Mounting Screw Size
M2.2 x 11
Butterbean Button Dimensions
0.8 x 0.5 x 0.4 in
Standard Button Dimensions
0.7 x 0.5 x 0.2 in