Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets the benchmark for closed guitar tuning machines, offering superior tuning comfort and precision. Engineered with a refined 1:18 gear ratio, it delivers an ultra-smooth, delicate, and highly stable tuning process. All components are precision CNC-machined and surface-treated, featuring a self-locking drive mechanism to ensure steady performance without slippage.
Crafted with premium high-grade brass posts fitted seamlessly into the housing, the M6 90 guarantees wear-free operation and exceptional tuning stability. The specialized stepped M6 flanged washer reliably centers the string post via the banjo bolt, eliminating tilting moment and removing pressure from both the post and rear mounting screws without requiring stepped peghead drilling.
Designed with identical mounting dimensions to its historic predecessor, this tuning machine allows for straightforward replacement and upgrades with no headstock modifications required. Permanently lubricated with Schaller special grease, every enclosed unit is completely maintenance-free and built for enduring reliability.
| 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 screw |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight | 0.79 lb |
| Brand | Schaller |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| String Post Material | Brass |
| Lubrication | Maintenance-free grease lubrication |
