Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune represents the ultimate fusion of refined vintage design, precise tuning capabilities, and smooth, reliable performance. Crafted with an open-gear architecture and precise worm gear pairing, it delivers an optimal 1:18 gear ratio that provides exceptional tuning stability and long-lasting accuracy without synthetic coatings to inhibit resonance.
Engineered with ultra-precise contact surfaces, permanently sealed fixtures, and countersunk mounting holes, this tuning machine ensures zero-wear operation and direct tonal transmission to the headstock. Its dimensions align with standard production instrument specifications, facilitating direct retrofitting and straightforward installation on solid and slotted headstocks alike.
Each single tuning machine is engineered for effortless maintenance-free performance, including dedicated mounting hardware and precision press-in hexagonal bushings for solid headstock setups. String roller variants for classical nylon-string applications offer ball-bearing integration to completely eliminate headstock friction and unwanted noise.
Brand
Schaller
Model
GrandTune Single (GT-Single)
SKU
GT-Single
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Weight
0.11 lb
Bushing Outer Diameter
0.35 in
Bushing Inner Diameter
0.24 in
String Post Fitment Diameter
0.24 in
Mounting Hardware Included
2 mounting screws (M2.2 x 11), 1 hexagonal bushing (for solid headstocks)