Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine delivers outstanding precision and tuning comfort with its refined 1:18 gear ratio. Continuing the legacy of the original sealed tuner introduced in 1966, this updated design incorporates modern engineering enhancements while preserving its iconic character.
Each component is CNC-machined to exacting tolerances and treated with a high-grade surface finish, paired with a self-locking drive mechanism for smooth, velvety, and stable tuning. The high-quality brass string posts are precision-fitted into the housing and permanently lubricated with Schaller special grease for completely maintenance-free operation.
Featuring the innovative stepped M6 flanged washer, this tuning machine reliably centers the string post through the banjo bolt without requiring a stepped peghead bore. This design eliminates tilting torque and relieves mechanical stress from both the post and the rear mounting screw for maximum durability.
Brand
Schaller
Product Type
Guitar Tuning Machine
Series
M6 Series
Model
M6 90
Gear Ratio
1:18
Post Material
High-Grade Brass
Lubrication
Schaller Special Grease (Maintenance-Free)
Button Bore Hole
Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat
Weight per Single Tuner with Button (Small/Large)
Metal: 1.27 oz / 1.34 oz (36 g / 38 g); Perloid: 1.06 oz / 1.09 oz (30 g / 31 g); Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) including banjo bolt
Weight
0.79 lb