Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune Single combines classic vintage open-gear aesthetics with modern precision engineering and exceptionally smooth tuning performance. Featuring an open gear and worm architecture without synthetic polymer coatings, it establishes direct resonance transfer across the headstock of your instrument.
With a precise 1:18 gear ratio, this tuning machine delivers exact intonation control and outstanding long-term tuning stability. Its permanently locked, sealed screw joints ensure wear-free and maintenance-free operation over extended playing lifetimes.
Engineered to standard instrument dimensions for straightforward installation or replacement, it features countersunk screw holes that provide a secure hold and optimal acoustic transmission.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Design
Open Gear
Weight per Unit
0.63 oz (Koa), 0.67 oz (Perloid), 0.71 oz (Galalith, Ebony), 0.74 oz (Snakewood), 0.88 oz (Butterbean) including bushing
Button Dimensions
0.8 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons)
Mounting Hardware
2 x M2.2 x 11 mm countersunk mounting screws, 1 x hexagonal press-in bushing (0.35 in outer diameter)