Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines refined vintage design with precise tuning and ultra-smooth performance. Built as a perfected open-gear tuning machine with a classic worm gear architecture, it delivers exceptional resonance and aesthetics on any acoustic or electric instrument.
Featuring a 1:18 gear ratio, this machine head provides unmatched accuracy and longevity. The absence of synthetic coatings ensures direct acoustic coupling, while ultra-precise contact surfaces eliminate wear and stick-slip friction over time.
Equipped with permanently locked and sealed screw joints, the GrandTune requires zero maintenance. Standard production dimensions and countersunk mounting holes guarantee seamless installation, a secure fit, and optimal tone transfer.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
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 bushing
Button Dimensions (W x H x D)
0.8 x 0.5 x 0.4 in (Butterbean), 0.7 x 0.5 x 0.2 in (all other buttons)
Product Weight
0.11 lb
Design
Open Gear
Hardware Included
2 countersunk mounting screws (M2.2 x 11), 1 hexagonal press-in bushing (solid headstock version)
Bushing Outer Diameter
0.35 in
Bushing Inner Diameter
0.24 in