Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine represents high-precision instrument hardware, engineered with a refined 1:18 gear ratio for exceptionally smooth and accurate tuning. Designed as a direct-fit replacement sharing identical mounting dimensions with its predecessor, it integrates seamlessly onto compatible guitar headstocks without modifications.
Every component is precision CNC-machined and surface-finished, featuring self-locking brass posts crafted for long-term wear resistance and superior tuning stability. The closed housing comes permanently lubricated with Schaller special grease, ensuring maintenance-free performance across diverse playing conditions.
Equipped with an innovative stepped M6 flange washer with a 0.39-inch diameter base, this tuning machine properly centers the string post without requiring stepped peghead drilling. This mechanical design distributes pressure evenly and eliminates tilting forces on both the post and rear mounting screws.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Post Material
Brass
Button Bore Hole
0.17 in diameter with 0.14 in drive flat
Flange Washer Diameter
0.39 in
Weight per Unit (Small / Large Button)
Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz)
Lubrication
Permanently lubricated with Schaller special grease
Weight
0.13 lb