Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines refined vintage aesthetics with precise tuning performance and velvety smooth action. Built with a classic open-gear design and worm gear architecture, it delivers exceptional resonance without relying on synthetic polymer coatings.
Featuring an ultra-precise 1:18 gear ratio, this tuning machine provides uncompromising accuracy, tuning stability, and extended longevity. Its permanently locked and sealed screw joints ensure wear-free and maintenance-free operation across years of playing.
Engineered to standard instrument dimensions for straightforward installation and replacement, it features countersunk screw holes that ensure firm mounting and optimal acoustic transfer to the headstock.
Brand
Schaller
Model
GrandTune (GT-Single)
Product Type
Guitar Tuning Machine
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
0.8 x 0.5 x 0.4 in (Butterbean), 0.7 x 0.5 x 0.2 in (all other buttons)
Bushing Specification
Hexagonal press-in bushing with 0.35 in outer diameter, 0.24 in inner diameter
Mounting Screws Included
2 x M2.2 x 11 mm countersunk screws