Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine represents high-precision engineering with an advanced 1:18 gear ratio, delivering ultra-smooth operation and superior tuning stability. Designed as the benchmark for closed-type tuners, all components are CNC-machined to exact tolerances for a dependable and backlash-free feel.
Equipped with high-grade brass string posts and permanently lubricated with proprietary Schaller grease, these tuners provide completely maintenance-free performance. The innovative stepped M6 flanged washer centers the string post securely without requiring stepped peghead drilling, eliminating tilt torque and relieving stress on mounting screws.
With identical mounting dimensions to its legacy predecessor, this tuning machine drops directly into standard configurations without headstock modifications. It offers reliable tuning precision suitable for professional instrument upgrades and custom builds.
Brand
Schaller
Series
M6 Series
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Product Weight
0.8 lb
Weight per Tuner (Small / Large Button)
Metal (1.3 oz / 1.3 oz), Perloid (1.1 oz / 1.1 oz), Ebony (1.1 oz / 1.1 oz) including hollow screw
Button Bore Hole
Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat
Post Material
High-Grade Brass
Lubrication
Schaller Special Grease (Maintenance-Free)