Schaller M6 135 Guitar Tuning Machine

The Schaller M6 135 guitar tuning machine offers precision engineering and smooth operation with an improved 1:18 gear ratio. Designed to set the standard for closed tuning machines, all components are CNC-machined and surface-treated to deliver sensitive, stable, and wear-free tuning performance.
Equipped with high-grade brass posts fitted into the housing, this machine head maximizes tuning stability. The stepped M6 flanged washer centers the string post securely through the hollow screw, eliminating tilting torque and protecting against excessive mechanical stress.
Permanently lubricated with specialized grease, the closed design requires zero maintenance. Featuring identical installation dimensions to its predecessor, it serves as a seamless upgrade or direct replacement for standard guitar headstocks.
Gear Ratio
1:18
Weight per Unit with Button (Small/Large)
Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including banjo bolt
Button Bore Hole
Diameter 0.17 in (4.2 mm) with drive flat 0.14 in (3.6 mm)
Product Weight
0.13 lb
Brand
Schaller
Series
M6 Series
Material
Brass Posts, Metal Housing
Type
Guitar Tuning Machine