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. Designed as an evolution of the industry-standard closed machine head, it offers silky-smooth operation and rock-solid stability for serious musicians.
Precision CNC-machined components and high-grade brass string posts ensure wear-free longevity and peak tuning consistency. Each unit is permanently lubricated with Schaller special grease, providing completely maintenance-free performance across years of playing.
Featuring the innovative stepped flanged washer, the M6 90 eliminates tilt torque and relieves stress from both the post and rear mounting screw. It retains identical mounting dimensions to its predecessor for direct, modification-free drop-in replacement on your instrument.
Brand
Schaller
Product Type
Guitar Tuning Machine
Series
M6 Series
Gear Ratio
1:18
Post Material
Brass
Weight
0.8 lb
Weight per Single Tuner with Button (Small/Large)
Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including hollow screw
Button Bore Hole
Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm)
Lubrication
Permanently lubricated with Schaller special grease