Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune Single Guitar Tuning Machine combines vintage styling with precision tuning performance. Featuring an open-gear design with high-precision worm gears, it delivers smooth operation and consistent tuning stability for a variety of instruments.
Built with a 1:18 gear ratio, this tuning machine provides ultra-precise adjustments and long-lasting durability. The coating-free contact surfaces and permanently locked, sealed screw joints ensure smooth friction and reliable, maintenance-free performance.
Designed to fit standard production instrument specifications, this tuner allows for straightforward installation or replacement. Countersunk screw holes ensure secure mounting and solid acoustic resonance directly through 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 (Perloid), 0.71 oz (Galalith, Ebony), 0.74 oz (Snakewood), 0.88 oz (Butterbean) including press-in bushing
Button Dimensions (W x H x D)
0.8 x 0.5 x 0.4 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons)
Included Bushing Outer Diameter
0.35 in
Included Bushing Inner Diameter
0.24 in
Post Compatibility
0.24 in
Mounting Screws
2x M2.2 x 11 mm per single tuner