Schaller GrandTune Single Guitar Tuning Machine

The Schaller GrandTune Single combines vintage aesthetics with precise tuning response and smooth performance. Featuring an open-gear architecture with a worm gear design, it delivers an exact 1:18 gear ratio for tuning accuracy and long-term reliability. Without synthetic coatings, the tuning machine integrates cleanly with your instrument to ensure unrestricted resonance.
Engineered with ultra-precise contact surfaces, the mechanism produces optimal stick-slip action without wear or aging over time. Permanently locked and sealed screw connections provide maintenance-free operation, while countersunk screw holes ensure a solid mount and efficient acoustic transfer.
Designed to match standard production instrument dimensions, the GrandTune allows for straightforward installation and direct replacement. Each single machine comes complete with mounting screws and a hexagonal press-in bushing for solid headstocks.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Design
Open Gear
Item Weight
0.11 lb
Weight per Machine
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 (WxHxD)
0.80 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons)
Mounting Type
Screw-in / Press-in Bushing