Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune combines vintage aesthetics with precision tuning and smooth performance. Engineered as a perfected classic open-gear tuning machine, it features an exposed gear and worm drive mechanism designed for optimal acoustic resonance on any instrument without the use of synthetic polymer coatings.
Featuring a 1:18 gear ratio, this tuning machine delivers high tuning accuracy and long-term durability. The ultra-precise fittings and contact surfaces provide stick-slip-free action, while permanently locked and sealed screw connections ensure wear-free and maintenance-free operation over time.
Designed to fit standard production instrument dimensions, the GrandTune allows for straightforward installation and replacement. Countersunk screw holes ensure a firm mount and direct resonance transfer, preserving the instrument's natural tone and stability.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Design
Open Gear
Weight per Single Tuner
0.04 lb (Koa), 0.04 lb (Perloid), 0.04 lb (Galalith, Ebony), 0.05 lb (Snakewood), 0.06 lb (Butterbean)
Button Dimensions (WxHxD)
0.80 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons)
Mounting Hardware Included
2 mounting screws (M2.2 x 11), 1 hexagonal press-in bushing (solid headstock)
Bushing Outer Diameter
0.35 in
Bushing Inner Diameter
0.24 in
Total Weight
0.11 lb