Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 features an improved 1:18 gear ratio that provides velvety-smooth tuning precision and maximum tuning comfort. As the evolution of the original closed tuning machine established in 1966, this model brings contemporary engineering refinements while preserving its classic performance legacy.
Precision CNC-machined components and surface-treated finishes work alongside a self-locking drive mechanism to deliver delicate, stable adjustment. Premium brass string posts are fitted precisely into the housing to guarantee exceptional tuning stability, long-term wear resistance, and permanently lubricated, maintenance-free operation using Schaller special grease.
Installation is streamlined with the innovative stepped M6 flanged washer, which centers the string post without requiring a stepped headstock bore. This design eliminates tilting torque and reduces mechanical stress on both the string post and rear fixing screws, matching the exact mounting dimensions of its predecessor for a seamless drop-in replacement.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Single Unit 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) including hollow screw |
| Product Weight | 0.13 lb |
