Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune combines stylish vintage aesthetics with precise tuning response and ultra-smooth operation. Designed as an open-gear tuner with a worm drive, it delivers classic styling alongside modern engineering. Its 1:18 gear ratio provides exceptional tuning precision and enduring reliability.
Crafted without synthetic polymer coatings on its friction surfaces, this tuner forms a resonant connection with your instrument. Ultra-precise contact fits eliminate stick-slip motion, providing smooth action without wear or aging. Permanently sealed and locked screw connections guarantee zero maintenance and long-lasting stability.
Engineered to standard instrument dimensions for straightforward installation or replacement, it features countersunk screw holes that ensure firm mounting and optimal acoustic transmission. String Roller Deluxe configurations include a dedicated ball bearing at the post end to ensure completely silent, frictionless tuning on nylon-string guitars.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Model Number
GT-Single
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Gear Design
Open Gear with Worm Screw
Product Weight
0.67 lb
Single Tuner Weight
18 g (Koa), 19 g (Perloid), 20 g (Galalith, Ebony), 21 g (Snakewood), 25 g (Butterbean) including bushing
Button Dimensions
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 Included
2 x Countersunk Screws per Single Tuner (M2.2 x 11)