Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine delivers outstanding precision and smooth tuning comfort with an upgraded 1:18 gear ratio. All components are CNC-machined and surface-treated to guarantee fluid, sensitive, and stable operation through its self-locking drive.
Crafted with precision-fitted brass string posts, the M6 90 ensures maximum tuning stability and wear-free performance. Each enclosed tuner is permanently lubricated with Schaller special grease, making it completely maintenance-free over its extended lifespan.
Featuring the innovative stepped M6 flanged washer, this tuning machine centers the string post securely without requiring stepped headstock drilling. This design eliminates tilting torque, reducing stress on both the post and mounting screw while matching the exact installation dimensions of its predecessor.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Post Material
Brass
Weight per Unit with Button
Metal: 1.27 oz / 1.34 oz (36 g / 38 g), Perloid: 1.06 oz / 1.09 oz (30 g / 31 g), Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) including threaded bushing
Button Bore Hole
Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm)
Lubrication
Permanent Schaller Special Grease
Weight
0.79 lb