Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine represents an industry benchmark in precision engineering and tuning stability. Equipped with an advanced 1:18 gear ratio, it delivers ultra-smooth operation and exact pitch adjustments. CNC-machined components and self-locking drive technology ensure dependable, long-term performance across demanding playing environments.
Crafted with premium brass string posts precision-fitted into the housing, each tuner delivers maximum wear resistance and consistent string tension. The specialized stepped collar washer design centers the post accurately over the banjo bolt, preventing tilt moment and protecting the headstock from undue stress without requiring stepped peghead drilling.
Permanently lubricated with Schaller special grease for entirely maintenance-free service, the M6 90 features identical mounting dimensions to its classic predecessor, allowing for seamless retrofit installations without modification.
Gear Ratio
1:18
Weight per Single Tuner with Button (Small / Large)
Metal (1.3 oz / 1.3 oz), Perloid (1.1 oz / 1.1 oz), Ebony (1.1 oz / 1.1 oz) including hollow bolt
Button Hole
0.2 in diameter with 0.1 in flat drive surface
Brand
Schaller
Series
M6 Series
Model
M6 90
Housing Type
Enclosed
Lubrication
Schaller Special Grease (Maintenance-Free)
Post Material
High-Grade Brass
Manufacturing Process
CNC-Machined