Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine represents high precision and tuning comfort with its 1:18 gear ratio. All components are CNC-machined to exacting tolerances, surface-treated, and driven by a self-locking mechanism that ensures smooth, sensitive, and reliable tuning stability.
Crafted with premium brass string posts carefully fitted into the housing, this enclosed tuner guarantees wear-free performance. Permanent lubrication with Schaller special grease ensures completely maintenance-free operation across its entire lifespan.
Featuring the innovative stepped M6 flanged washer, the unit mounts seamlessly while automatically centering the string post to eliminate tilt and relieve mounting screw tension. Built to identical installation dimensions as previous generations, it allows effortless replacement without headstock modifications.
Gear Ratio
1:18
Weight with Button per Single Tuner (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
0.17 in diameter with 0.14 in driving flat
Weight
0.13 lb
Brand
Schaller
Series
M6 Series
Model
M6 90
Post Material
Brass
Lubrication
Schaller Special Grease (Maintenance-Free)