Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine delivers refined performance and precision tuning for electric and acoustic guitars. Featuring an advanced 1:18 gear ratio, this closed tuning machine provides an exceptionally smooth, responsive feel and reliable pitch stability during fine adjustments.
Engineered with precision CNC-machined components and premium brass string posts, the M6 90 minimizes mechanical wear while maximizing long-term durability. Each unit is permanently lubricated with Schaller special grease, ensuring maintenance-free operation throughout its lifespan.
Installation is simplified by the innovative stepped M6 flanged washer, which centers the post securely through the hollow screw and eliminates tilt torque without requiring stepped peghead drilling. With identical installation dimensions to predecessor models, it serves as a direct, drop-in replacement.
Gear Ratio
1:18
Weight per Single Tuner with Button (Small/Large)
Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including hollow screw
Button Bore Hole
Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm)
Product Weight
0.13 lb
Brand
Schaller
Product Type
Guitar Tuning Machine
Series
M6 Series
Post Material
Brass
Lubrication
Permanent Special Grease