Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines refined vintage styling with precise tuning accuracy and ultra-smooth operation. Designed as a perfected open-gear tuning machine, it features a classic worm-and-gear mechanism engineered without synthetic coatings to provide optimal acoustic resonance on any instrument.
Featuring a 1:18 gear ratio, this tuning machine delivers high-precision response and exceptional long-term tuning stability. Its ultra-precise fit and wear-free contact surfaces ensure enduring performance, while countersunk screw holes provide solid structural coupling and enhanced tone transfer.
Built to fit standard instrument dimensions for straightforward installation and replacement, it incorporates permanently locked and sealed screw connections for maintenance-free reliability throughout the life of your guitar.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Design
Open Gear
Mounting Type
Countersunk Screw Mount
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 bushing
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)
Press-in Bushing Outer Diameter
0.35 in
Press-in Bushing Inner Diameter
0.24 in
Overall Product Weight
0.11 lb