Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 represents precision engineering and modern tuning comfort. Built with a refined 1:18 gear ratio, it delivers ultra-smooth, exact, and dependable tuning for electric and acoustic guitars. Every component is CNC-machined to precise tolerances and lubricated with specialized grease for completely maintenance-free operation.
Equipped with high-grade brass posts and a self-locking internal drive mechanism, this tuning machine provides maximum tuning stability and long-term wear resistance. The innovative stepped M6 flanged collar reliably centers the string post through the headstock bushing, eliminating tilt and removing mechanical strain from both the post and mounting screw without requiring stepped boreholes.
Engineered to match original M6 installation dimensions, the M6 90 serves as a direct, modification-free replacement. Each unit ensures smooth action and structural rigidity, making it an essential upgrade for professional musicians and luthier builds alike.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Button Borehole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Single Unit Weight (Small / Large) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including hollow screw |
| Total Weight | 0.79 lb |
| Included Hardware | Hollow screws, stepped flanged collars, mounting screws (M2.2 x 9.5) |
