Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines stylish vintage aesthetics with precise tuning performance and velvety smooth action. This open-gear tuning machine features a classic worm gear design engineered to provide flawless resonance and lasting tuning stability.
Equipped with a precise 1:18 gear ratio, it ensures fine adjustments and reliable long-term durability. By eliminating polymer coatings, the ultra-precise contact surfaces provide optimal stick-slip behavior and wear-free interaction directly on your instrument.
Permanently locked and sealed fittings deliver maintenance-free operation over time. Designed to match standard production instrument dimensions, it includes countersunk screw holes to ensure a secure fit and optimal tonal transfer.
Brand
Schaller
Model
GrandTune (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Configuration
Single Tuning Machine
Design
Open Gear
Weight per Single Machine
0.63 oz (Koa), 0.67 oz (Perloid), 0.71 oz (Galalith, Ebony), 0.74 oz (Snakewood), 0.88 oz (Butterbean)
Button Dimensions (W x H x D)
0.80 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons)
Bushing Outer Diameter
0.35 in
Bushing Inner Diameter
0.24 in
Compatible Post Diameter
0.24 in
Mounting Screws
2x Countersunk screws (M2.2 x 11)