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 CNC-machined to exact tolerances, premium finished, and engineered with a self-locking drive for consistent, sensitive, and stable tuning.
Featuring high-grade brass string posts precisely fitted into the housing, the M6 90 ensures maximum tuning stability and wear-free performance. The innovative stepped M6 flanged washer guarantees effortless installation and permanently centers the string post over the threaded bushing without requiring stepped headstock holes.
Permanently lubricated with Schaller special grease, these sealed tuning machines are entirely maintenance-free. With identical mounting dimensions to its predecessor, the M6 90 serves as a direct drop-in replacement without modification.
| Brand | Schaller |
| Series | M6 Series |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | High-Grade Brass |
| Weight | 0.79 lb |
| Single Tuner 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) including hollow screw |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Lubrication | Schaller Special Grease, Maintenance-Free |
