Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding precision and tuning comfort with its improved 1:18 gear ratio. All components are high-precision CNC-machined and surface-finished, featuring a self-locking drive mechanism that guarantees smooth, sensitive, and stable tuning performance.
Crafted with premium brass string posts precision-fitted into the housing, this tuning machine provides maximum wear resistance and tuning stability. Each closed unit is permanently lubricated with Schaller special grease for completely maintenance-free operation over its lifespan.
Featuring the innovative stepped M6 flanged washer, it eliminates tilting moment and ensures reliable axis centering through the banjoscrew without requiring a stepped headstock bore. The M6 90 retains identical installation dimensions to its predecessor for direct replacement without instrument modifications.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| 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) including hollow screw |
| Button Borehole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Post Material | Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
