Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines classic vintage aesthetics with precise tuning response and ultra-smooth operation. Designed as an open-gear tuner with a precision worm drive, it delivers exceptional tonal resonance across acoustic, electric, and classical instruments.
A precise 1:18 gear ratio ensures accurate tuning stability and long-lasting durability. Manufactured without synthetic polymer coatings, the contact surfaces provide stick-slip-free movement while sealed screw fittings eliminate wear and maintenance requirements.
Engineered to standard instrument dimensions for straightforward replacement and installation, this tuner features countersunk screw holes that ensure solid mounting and efficient string vibration transfer.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Gear Ratio
1:18
Weight per Unit
0.04 lb (Koa), 0.04 lb (Perloid), 0.04 lb (Galalith, Ebony), 0.05 lb (Snakewood), 0.06 lb (Butterbean) including bushing
Button Dimensions
0.8 x 0.5 x 0.4 in (Butterbean), 0.7 x 0.5 x 0.2 in (all other buttons)
Included Screws
2 x countersunk mounting screws per tuner (M2.2 x 11)
Included Bushing
1 x hexagonal press-in bushing per tuner, outer diameter 0.35 in (inner diameter 0.24 in, fits 0.24 in string post)
Estimated Shipping Weight
0.1 lb