Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines stylish vintage aesthetics with precise tuning performance and velvety smooth action. This perfected open-gear tuning machine features an exposed worm gear and precise mechanical tolerances designed for superior resonance and durability.
A gear ratio of 1:18 delivers accurate and stable instrument tuning without relying on synthetic polymer coatings. Permanently locked, sealed screw joints ensure wear-free and maintenance-free operation across years of playing.
Engineered to standard instrument dimensions for straightforward replacement or new builds, it includes recessed screw holes for secure mounting and maximum acoustic transfer to the headstock.
Brand
Schaller
Model
GrandTune Single (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 (Pearloid), 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 (8.8 mm)
Post Diameter Compatibility
0.24 in (6.0 mm)
Mounting Screws
2 x M2.2 x 11 mm per machine