Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision instrument hardware engineered with an advanced 1:18 gear ratio for smooth, accurate, and stable tuning performance. CNC-machined components and high-grade brass string posts provide wear-free durability and exceptional tuning stability.
Equipped with an innovative stepped M6 flanged washer, this tuning machine centers the string post securely through the banjo bolt without requiring a stepped headstock bore. This functional design eliminates tilting torque and reduces mechanical strain on both the post and mounting screws.
Permanently lubricated with Schaller special grease, each enclosed unit provides long-term maintenance-free operation. The standard mounting dimensions match predecessor models directly, allowing for straightforward installation and direct replacement on electric and acoustic guitars.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | High-Grade Brass |
| Lubrication | Permanently lubricated with Schaller special grease (maintenance-free) |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Single Unit 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) |
| Product Weight | 0.79 lb |
