Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 sets a benchmark for closed guitar tuning machines, offering an improved 1:18 gear ratio for exceptionally precise and smooth tuning. Every component is CNC-machined to exact tolerances and surface-finished to ensure uniform, sensitive, and stable operation.
Featuring string posts crafted from high-grade brass, these tuners fit tightly into the housing to guarantee maximum tuning stability and wear-free performance. An innovative stepped M6 flanged washer reliably centers the string post over the threaded bushing, eliminating tilting torque and protecting the headstock without requiring stepped bore holes.
All enclosed machine heads are permanently lubricated with Schaller special grease for completely maintenance-free longevity. Designed with identical mounting dimensions to its predecessor, the M6 90 serves as a direct drop-in replacement without requiring guitar modifications.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Post Material
Brass
Lubrication
Schaller Special Grease (Permanently Lubricated)
Button Bore Hole
0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat
Weight
0.79 lb