Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune Single Guitar Tuning Machine provides an advanced blend of vintage open-gear aesthetics, precise tuning action, and smooth performance. Built with an open gear and worm gear design, this tuner features an 1:18 gear ratio that delivers exceptional precision, longevity, and stability.
Constructed without synthetic or polymer coatings, the tuner creates natural resonance across the entire instrument. Ultra-precise contact surfaces ensure optimal stick-slip behavior without wear or degradation, while permanently locked and sealed screw fittings guarantee maintenance-free reliability over years of playing.
Designed around standard instrument dimensions, the GrandTune allows straightforward installation and replacement on solid or slotted headstocks. Recessed mounting screw holes deliver a secure fit and maximum tone transfer across acoustic, classical, and electric guitars.
Brand
Schaller
Product Type
Guitar Tuning Machine
Model
GrandTune Einzelmechanik (GT-Single)
Gear Ratio
1:18
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)
Bushing Outer Diameter
0.35 in
Bushing Inner Diameter
0.24 in
Compatible String Post Diameter
0.24 in
Mounting Screws Included
2 x M2.2 x 11 mm countersunk screws per tuner