Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers high-precision tuning stability with an improved 1:18 gear ratio for smooth and precise adjustment. Built on the legacy of the original closed-housing design, it features precision CNC-machined components and high-grade brass posts engineered for wear-free performance.
Equipped with Schaller's innovative stepped flanged washer, the tuning machine centers the string post securely through the banjo bolt without requiring stepped peghead drilling. This eliminates tipping moments and reduces stress on both the string post and rear mounting screw.
Each closed-type unit is permanently lubricated with Schaller special grease for completely maintenance-free operation. Designed to match the exact mounting dimensions of previous M6 models, it installs directly as a drop-in upgrade or replacement.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| 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 bolt |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive surface |
| Post Material | High-Grade Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
| Weight | 0.13 lb |
