Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune provides the ultimate blend of refined vintage design, precise tuning accuracy, and velvet-smooth performance. Built as an open-gear tuner featuring an exposed worm gear and pinion, it delivers reliable mechanical action without synthetic coatings to preserve natural instrument resonance.
Equipped with a precise 1:18 gear ratio, this tuning machine ensures fine-tuned control, exceptional tuning stability, and lasting durability. Ultra-precise contact surfaces create smooth engagement free from wear or aging, while permanently locked and sealed screw connections guarantee zero-maintenance operation.
Designed around standard production guitar headstock dimensions for straightforward installation and replacement, each unit includes countersunk screw holes to ensure firm seating and unhindered acoustic transfer.
Brand
Schaller
Model
GrandTune Single (GT-Single)
SKU
GT-Single
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Gear Construction
Open Gear
Weight per Single Tuner
0.04 lb (Koa), 0.04 lb (Perloid), 0.04 lb (Galalith, Ebony), 0.05 lb (Snakewood), 0.06 lb (Butterbean) including press-in 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)
Included Bushing Outer Diameter
0.35 in
Included Bushing Inner Diameter
0.24 in
Compatible String Post Diameter
0.24 in
Mounting Screws Included
2x countersunk M2.2 x 11 mm
Estimated Shipping Weight
0.11 lb