Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets a high standard for closed guitar tuning machines, combining timeless design with modern precision engineering. Built with a refined 1:18 gear ratio, it delivers an exceptionally smooth, accurate, and stable tuning experience. CNC-machined components and high-grade brass string posts ensure wear-free operation and maximum tuning stability over years of heavy use.
Featuring the innovative M6 flanged step washer, this tuner guarantees straightforward mounting and consistent center alignment without requiring stepped headstock holes. The specialized design effectively eliminates tilting torque while relieving mechanical strain on both the post and the rear mounting screws. Each sealed unit is permanently lubricated with proprietary Schaller grease for maintenance-free reliability.
Sharing identical footprint dimensions with its legendary predecessor, the M6 90 offers seamless retrofitting without modifications to your instrument. It provides a solid upgrade for guitars requiring dependable tension, precise pitch adjustments, and superior German-engineered hardware.
| Gear Ratio | 1:18 |
| Weight with Button per Tuner (Small / Large) | Metal (1.3 oz / 1.3 oz), Pearloid (1.1 oz / 1.1 oz), Ebony (1.1 oz / 1.1 oz) including banjo bolt |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Flanged Washer Diameter | 0.39 in (10 mm) |
| Product Weight | 0.79 lb |
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Post Material | High-Grade Brass |
| Housing Design | Sealed / Enclosed |
| Lubrication | Permanently lubricated with Schaller special grease |
