Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision engineering with an advanced 1:18 gear ratio, delivering ultra-smooth and precise tuning performance. Built as an evolution of the industry-standard closed tuner design established in 1966, it features premium CNC-machined components and a self-locking drive for exceptional tuning stability.
Crafted with precision-fitted brass string posts, the M6 90 ensures maximum wear resistance and consistent response. The innovative stepped M6 flanged washer reliably centers the string post over the banjonut, eliminating tilting friction and removing mechanical stress without requiring stepped headstock drilling.
Permanently lubricated with Schaller special grease, these maintenance-free tuners match the installation dimensions of previous M6 models for effortless, modification-free retrofitting across a wide variety of configurations.
| Brand | Schaller |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Weight | 0.79 lb |
| Single Unit Weight (Small / Large Button) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) |
| Button Bore Hole | 0.17 in diameter with 0.14 in drive flat |
| Lubrication | Permanently lubricated with special grease |
