Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine delivers outstanding precision and smooth tuning performance with its refined 1:18 gear ratio. All components are CNC-machined to exacting tolerances, surface-finished, and permanently lubricated with proprietary grease for maintenance-free operation.
Equipped with high-grade brass string posts and a self-locking drive mechanism, this tuning machine provides maximum tuning stability and wear resistance. The innovative stepped M6 flanged washer centers the string post reliably through the banjonut, eliminating tilting torque and removing lateral pressure from both the post and mounting screw without requiring stepped headstock drilling.
Featuring the standard mounting dimensions of previous iterations, the M6 90 allows for direct drop-in replacement on compatible guitar headstocks. It offers precision tuning feel, stable pitch retention, and reliable structural support for demanding players.
Brand
Schaller
Product Line
M6 Series
Model
M6 90
Gear Ratio
1:18
String Post Material
Brass
Button Bore Hole Diameter
0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat
Lubrication
Permanently lubricated, maintenance-free
Product Weight
0.79 lb