Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine represents precision engineering and outstanding tuning comfort with its refined 1:18 gear ratio. All components are high-precision CNC-machined and surface-treated, featuring a self-locking drive that guarantees smooth, sensitive, and stable tuning performance.
Crafted with premium brass string posts precisely fitted into the housing, this tuning machine delivers maximum tuning stability and wear-free operation. The enclosed housing is permanently lubricated with Schaller special grease, ensuring maintenance-free longevity.
Featuring the innovative stepped M6 flanged washer with a 0.39-inch diameter, it reliably centers the string post via the banjo bolt and eliminates tilting torque without requiring stepped headstock boreholes. The M6 90 matches the exact installation dimensions of its predecessor for seamless drop-in replacement.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Post Material
Brass
Flanged Washer Diameter
0.39 in
Mounting Screw Size
M2.2 x 9.5 mm (0.37 in)
Button Borehole
0.17 in diameter with 0.14 in drive flat
Single Tuner Weight with Button (Small/Large)
Metal: 1.27 oz / 1.34 oz; Perloid: 1.06 oz / 1.09 oz; Ebony: 1.06 oz / 1.09 oz
Product Weight
0.79 lb
Lubrication
Schaller special grease, maintenance-free