Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines refined vintage styling with precise tuning response and ultra-smooth operation. Designed as an open-gear tuner with an optimized worm gear architecture, it ensures maximum resonance and structural integrity without polymer coatings.
Featuring a precise 1:18 gear ratio, this tuning machine delivers exceptional tuning accuracy, long-term durability, and wear-free performance. Its permanently locked, sealed, and covered screw joints guarantee zero maintenance and enduring stability on your finest instruments.
Crafted to standard industry dimensions, it allows seamless installation and direct replacement. Counterbored mounting screw holes ensure solid anchoring and optimal vibrational acoustic transfer to the headstock.
Brand
Schaller
Model
GrandTune (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Product Weight
0.67 lb
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)
Button Dimensions
0.8 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons)
Mounting Hardware Included
2 countersunk mounting screws (M2.2 x 11), 1 hexagonal press-in bushing (0.35 in outer diameter, 0.24 in inner diameter)
String Roller Deluxe Ball Bearing Diameter
0.39 in
String Roller Deluxe Shaft Diameter
0.39 in