Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune Single Guitar Tuning Machine combines vintage open-gear aesthetics with modern precision engineering. Built with a 1:18 gear ratio, it provides smooth, accurate, and stable tuning performance across acoustic and electric instruments.
Engineered without synthetic coatings, the ultra-precise contact surfaces offer wear-free operation and resonance transfer. Permanently locked and sealed screw joints ensure maintenance-free reliability over years of playing.
Designed to fit standard production instrument specifications, this tuning machine features countersunk mounting holes for secure attachment and optimal acoustic coupling.
Brand
Schaller
Product Type
Single Tuning Machine
Model
GrandTune (GT-Single)
Gear Ratio
1:18
Design
Open Gear
Weight per Single Tuner
0.63 oz (Koa), 0.67 oz (Perloid), 0.71 oz (Galalith, Ebony), 0.74 oz (Snakewood), 0.88 oz (Butterbean)
Button Dimensions
0.80 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons)
Bushings Included
Hexagonal press-in bushing for solid headstocks (outer diameter 0.35 in, inner diameter 0.24 in)
Mounting Screws Included
2 countersunk screws per tuner (M2.2 x 11 mm)