Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine represents precision engineering with a refined 1:18 gear ratio, delivering velvet-smooth and exact tuning stability. Built on the iconic legacy of the original closed-housing design, it incorporates advanced CNC-machined components and high-grade brass string posts.
Equipped with Schaller's innovative stepped flanged washer, this tuning machine ensures rock-solid post centering and eliminates tilting momentum without requiring stepped peghead drilling. Each closed-type unit is permanently lubricated with specialized grease for completely maintenance-free operation.
With identical installation dimensions to its predecessor, the M6 90 allows for seamless direct replacement and straightforward installation across compatible headstocks.
Brand
Schaller
Product Line
M6 Series
Model
M6 90
Gear Ratio
1:18
Housing Type
Closed
String Post Material
Brass
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)
Product Weight
0.13 lb