Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine represents precision engineering with an advanced 1:18 gear ratio, delivering ultra-smooth, delicate, and stable tuning comfort. CNC-machined to exact tolerances, each component features high-grade brass string posts engineered for wear-free durability and maximum tuning stability.
Featuring the innovative stepped M6 flanged washer, this design eliminates tilting torque and distributes pressure away from the string post and rear mounting screw. The integrated step centers the string post precisely through the banjo bolt without requiring a stepped headstock bore, simplifying installation and protecting the assembly.
All enclosed units are lubricated for life with specialized grease, guaranteeing completely maintenance-free operation. Built to standard dimensions, this unit directly replaces previous models without modification, making it a reliable choice for professional performance.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Post Material
Brass
Lubrication
Permanently lubricated
Button Bore Hole
Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat
Unit Weight (Metal Button, Small / Large)
1.27 oz / 1.34 oz
Unit Weight (Perloid Button, Small / Large)
1.06 oz / 1.09 oz
Unit Weight (Ebony Button, Small / Large)
1.06 oz / 1.09 oz
Product Weight
0.79 lb