Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune Single guitar tuning machine combines classic vintage open-gear aesthetics with precise engineering and smooth operation. Designed with an open worm gear architecture, it ensures maximum resonance transfer without synthetic coatings that degrade over time.
Featuring a precise 1:18 gear ratio, this tuning machine delivers fine tuning stability and long-lasting accuracy. Sealed screw connections and ultra-precise contact surfaces provide completely maintenance-free operation and exceptional stick-slip friction performance.
Built to fit standard instrument dimensions, it allows straightforward installation and direct replacement. Each single tuner for solid headstocks includes two mounting screws and a matching 0.35 in hexagonal press-in bushing.
Brand
Schaller
Product Type
Guitar Tuning Machine
Model
GrandTune Einzelmechanik (GT-Single)
Gear Ratio
1:18
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 (W x H x D)
0.8 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
Post Compatibility
0.24 in string post
Mounting Hardware
2 countersunk mounting screws (M2.2 x 11 mm)