Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine represents high precision and legendary reliability. Featuring an upgraded 1:18 gear ratio, it ensures velvet-smooth and exceptionally accurate tuning stability for modern instruments.
Every component is CNC-machined to exacting tolerances, featuring brass posts precision-fitted into the housing and self-locking drive gears. Sealed housings are permanently lubricated with Schaller special grease for completely maintenance-free operation.
Equipped with the innovative stepped M6 flanged washer with a 0.39 in (10 mm) base diameter, this tuning machine reliably centers the string post without requiring stepped peghead counterbores, effectively eliminating tilting torque and reducing post stress.
Gear Ratio
1:18
Weight with Button per Single Tuner (Small/Large)
Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including banjo bolt
Button Bore Hole
Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm)
Product Weight
0.79 lb
Brand
Schaller
Model
M6 90
Post Material
Brass
Lubrication
Maintenance-free grease lubrication