Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers renowned tuning precision with an improved 1:18 gear ratio for smooth and delicate adjustments. Designed with precision CNC-machined components and surface finishes, it features a self-locking drive that provides uniform and stable tuning performance.
Equipped with high-grade brass string posts engineered for an exact fit, this tuner offers exceptional wear resistance and pitch stability. The stepped M6 flanged washer centers the post reliably through the banjonut, eliminating tilting torque and removing excess stress from the mounting screws without requiring stepped headstock drilling.
Permanently lubricated with Schaller special grease for completely maintenance-free operation, the M6 90 shares the exact mounting dimensions of its predecessor for drop-in replacement without instrument modification. Each set includes mounting banjonuts, stepped washers, and mounting screws for complete installation.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Model | M6 90 |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Product Weight | 0.79 lb |
| Weight per Single Tuner 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 banjonut |
| Button Bore Hole | Diameter 0.17 in with 0.14 in drive flat |
| Post Material | Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
