Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers state-of-the-art tuning accuracy and smooth handling with an upgraded 1:18 gear ratio. All components are CNC-machined to exacting tolerances and surface-treated to ensure consistent, highly sensitive, and slip-free tuning performance.
Equipped with high-grade brass string posts engineered directly into the housing, this machine head provides maximum tuning stability and long-term wear resistance. The innovative stepped M6 flanged washer reliably centers the string post without requiring a stepped headstock bore, effectively eliminating tilting torque and reducing pressure on mounting screws.
Featuring permanent lubrication with specialized grease, the sealed housing ensures fully maintenance-free operation over extended use. Built with identical installation dimensions to its predecessor, it offers direct drop-in replacement functionality without requiring instrument modifications.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | High-Grade Brass |
| Weight | 0.79 lb |
| Single Tuner Weight with Button (Small/Large) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive surface |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
