Schaller M6 135 Guitar Tuning Machine

The Schaller M6 135 guitar tuning machine sets an industry benchmark with an upgraded 1:18 gear ratio for ultra-precise, velvet-smooth tuning comfort and superior pitch stability. Originally introduced in 1966 as the global standard for enclosed machine heads, this model delivers modern refinements while maintaining classic heritage.
Every component is precision CNC-machined and surface-treated to guarantee smooth, delicate operation through its self-locking drive mechanism. High-grade brass string posts are fitted securely into the housing for maximum wear resistance, while sealed lubrication with proprietary Schaller grease ensures permanent, maintenance-free reliability.
Featuring the innovative stepped M6 flanged washer with a 0.39-inch diameter base, it reliably centers the string post via the hollow bolt without requiring stepped peghead drilling. This design eliminates tilting torque and protects internal components, sharing identical mounting dimensions with its predecessor for seamless drop-in replacement.
Brand
Schaller
Model
M6 135
Gear Ratio
1:18
Button Bore Hole
Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive surface
Single Tuner Weight 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 hollow bolt
Product Weight
0.13 lb
Post Material
Brass
Lubrication
Permanently lubricated with Schaller special grease