Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine features an enhanced 1:18 gear ratio for exceptionally precise, smooth, and dependable tuning. All internal and external components are CNC-machined to exact tolerances, delivering smooth action and long-lasting performance.
Equipped with high-grade brass string posts engineered specifically for slotted or solid headstock applications, this sealed tuner utilizes self-locking drives and specialized lifetime lubrication to eliminate wear and maintenance. Identical footprint specifications allow direct drop-in replacement on existing standard M6 mounting patterns.
An innovative stepped collar design centers the string post automatically through the peghead without requiring complex counterbores. This structure effectively prevents tilt leverage while distributing string tension evenly across the rear housing and mounting screw.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
String Post Material
Brass
Button Bore Hole
0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat
Weight per Single Unit with Button
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