Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine delivers outstanding precision and tuning comfort with its refined 1:18 gear ratio. Continuing the legacy of the original 1966 closed-housing design, this updated model incorporates modern engineering enhancements while maintaining classic aesthetic appeal.
Every component is high-precision CNC-machined and surface-finished, featuring high-grade brass posts fitted precisely into the housing to ensure wear-free operation and maximum tuning stability. The self-locking drive and permanent lubrication with Schaller special grease provide velvet-smooth, maintenance-free performance.
Equipped with an innovative stepped M6 flanged washer (0.39 in diameter), this tuner centers the string post securely without requiring stepped peghead counterbores, effectively eliminating tilting torque and protecting the mounting screws. It shares identical mounting dimensions with its predecessor for seamless, modification-free installation.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Flanged Washer Diameter
0.39 in
Button Bore Hole
0.17 in diameter with 0.14 in drive flat
Post Material
Brass
Lubrication
Permanently lubricated with Schaller special grease
Single Tuner Weight (Metal Buttons)
0.08 lb (Small) / 0.08 lb (Large)
Single Tuner Weight (Perloid/Ebony Buttons)
0.07 lb
Product Weight
0.79 lb