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 and exact tuning stability. Built upon the legendary enclosed tuner design introduced in 1966, this modern version features CNC-machined components with premium surface finishes for reliable, self-locking performance.
Equipped with high-grade brass string posts accurately fitted into the housing, the M6 90 prevents wear and preserves optimal tuning integrity. All enclosed housings come permanently lubricated with specialized Schaller grease, making the entire mechanism completely maintenance-free over long-term use.
An innovative stepped M6 flanged washer ensures effortless mounting and centered shaft alignment without requiring stepped headstock boreholes. This smart design eliminates tilting torque and protects both the string post and rear mounting screws from unwanted structural stress.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Post Material
High-Grade Brass
Lubrication
Special Grease (Maintenance-Free)
Button Borehole Diameter
0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat
Product Weight
0.79 lb