Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets the benchmark for enclosed guitar tuning machines, offering superior tuning precision and smooth operation. Engineered with a refined 1:18 gear ratio and self-locking drive, it provides exceptionally sensitive and reliable adjustments across all playing conditions.
Every component is CNC-machined to exact tolerances, featuring premium brass posts that are precisely seated into the housing to ensure maximum durability, wear resistance, and long-term pitch stability.
Featuring the innovative stepped M6 flanged washer, this tuning machine reliably centers the string post via the banjo bolt without requiring a stepped headstock bore. This design eliminates tilting forces, protects the mounting hardware, and comes permanently lubricated with Schaller special grease for completely maintenance-free performance.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.13 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 hollow screw |
| Button Bore Hole | Diameter 0.17 in with 0.14 in driving surface |
| Post Material | Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
