Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune Single Guitar Tuning Machine combines classic vintage aesthetics with advanced modern engineering. Featuring an open-gear design with a worm gear mechanism and an ultra-precise 1:18 gear ratio, it delivers velvety-smooth tuning stability and unmatched precision for various guitar styles.
Constructed without synthetic coatings, the GrandTune creates optimal stick-slip properties between contacting surfaces, ensuring zero wear or aging while preserving natural resonance. Permanently locked, sealed screw joints provide maintenance-free performance, solid tone transmission, and lasting durability.
Designed with standard instrument dimensions for straightforward installation and replacement, each unit comes with countersunk mounting screws and compatible bushings for solid headstock configurations. Its refined mechanical tolerances deliver flawless intonation and tuning reliability across everyday use.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Design
Open Gear
Mounting Screws
2 x Countersunk Mounting Screws (M2.2 x 11 mm)
Bushings
1 x Hexagonal Press-In Bushing (8.8 mm OD, 6.1 mm ID for solid headstocks)
Button Dimensions
0.8 x 0.5 x 0.4 in (Butterbean), 0.7 x 0.5 x 0.2 in (Other Buttons)
Weight
0.1 lb