Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine delivers precise and smooth tuning performance with its refined 1:18 gear ratio. Designed to build upon the legacy of the original 1966 closed-gear design, this tuner features precision CNC-machined components and high-grade brass posts fitted seamlessly into the housing for maximum tuning stability and wear resistance.
Equipped with the innovative stepped M6 flanged washer, this tuning machine simplifies installation by reliably centering the string post via the banjo bolt and eliminating the need for a stepped peghead hole. This design effectively absorbs pressure and removes tilting torque from both the string post and the rear mounting screw.
Each closed-housing unit is permanently lubricated with Schaller special grease, ensuring maintenance-free operation and enduring durability. Maintaining the exact installation dimensions of its predecessor, the M6 90 allows for direct, hassle-free replacement on compatible headstocks.
Brand
Schaller
Model
M6 90
Gear Ratio
1:18
Post Material
Brass
Button Bore Hole
Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm)
Weight
0.79 lb
Lubrication
Permanently lubricated with Schaller special grease