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. All components are CNC-machined to exact tolerances, premium surface-finished, and equipped with a self-locking drive for smooth, consistent, and stable tuning performance.
Crafted with premium brass string posts precisely fitted into the housing, this tuning machine guarantees maximum tuning stability and wear resistance. An innovative stepped M6 flanged washer centers the post reliably through the banjonut, eliminating tilting torque and removing stress from both the post and rear mounting screw without requiring stepped headstock holes.
Featuring permanent lubrication with Schaller specialized grease, these sealed tuners remain completely maintenance-free over their entire lifespan. With installation dimensions identical to its predecessor, the M6 90 allows for direct and effortless replacement on existing headstocks.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
String Post Material
High-Grade Brass
Lubrication
Schaller Special Grease, Permanently Sealed
Button Bore Hole
0.17 in (4.2 mm) diameter 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) including banjonut
Total Set Weight
0.79 lb