Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune Single delivers a refined fusion of classic vintage aesthetics and state-of-the-art engineering. Built with open-gear architecture and precision worm gear design, it provides an ultra-precise 1:18 gear ratio for smooth, accurate tuning. The absence of synthetic coatings allows for natural acoustic resonance and optimal instrument tone transfer.
Crafted with ultra-precise contact surfaces and permanently sealed screw joints, this tuning machine provides wear-free, maintenance-free performance over years of play. Countersunk screw holes ensure a firm, stable seat against the headstock, promoting maximum vibration transfer and long-lasting tuning stability.
Designed to fit standard serial instrument specifications, it offers straightforward installation and replacement. Each unit is engineered for reliable, velvety-smooth operation across diverse acoustic and electric guitar setups.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Configuration
Single Tuning Machine
Design
Open Gear
Weight per Machine
0.04 lb (Koa), 0.04 lb (Perloid), 0.04 lb (Galalith, Ebony), 0.05 lb (Snakewood), 0.06 lb (Butterbean)
Button Dimensions (W x H x D)
0.80 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons)
Mounting Screws
2x Countersunk screws (M2.2 x 11)
Bushing Outer Diameter
0.35 in
Bushing Inner Diameter
0.24 in
Compatible Post Diameter
0.24 in