Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 tuning machine provides exceptional precision and smooth tuning comfort with an upgraded 1:18 gear ratio. Designed with closed housing mechanics, it delivers self-locking, velvet-smooth gear action and dependable string stability.
Precision CNC-machined components and solid brass posts ensure minimal wear and continuous tuning reliability. Each unit includes a stepped M6 flanged washer (0.39-inch diameter) that effortlessly centers the post without requiring a stepped peghead bore, eliminating tilting forces and protecting mounting screws.
Permanently lubricated with specialized Schaller grease for maintenance-free operation, this tuner shares identical mounting dimensions with its predecessor for seamless retrofitting.
Brand
Schaller
Model
M6 90
Gear Ratio
1:18
Post Material
Brass
Weight
0.13 lb
Weight per Single Tuner with Button (Small / Large)
Metal (1.27 oz / 1.34 oz), Pearloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including hollow screw
Button Bore Hole
Diameter 0.17 in with 0.14 in driving surface
Flanged Washer Diameter
0.39 in
Lubrication
Maintenance-free Schaller special grease