Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents precision engineering with a refined 1:18 gear ratio, delivering ultra-smooth, fine-tuned accuracy and rock-solid tuning stability. Crafted with high-precision CNC-machined components and premium brass string posts, this enclosed tuner ensures wear-free longevity and dependable performance.
Featuring the innovative stepped M6 flanged washer, this tuning machine simplifies installation by reliably centering the string post via the hollow bolt without requiring stepped headstock drilling. This design eliminates tilting moments and relieves mechanical pressure from both the post and the rear mounting screw.
Every enclosed housing is permanently lubricated with Schaller special grease for completely maintenance-free operation over its lifetime. The M6 90 maintains the identical mounting dimensions of its classic predecessor, allowing for direct drop-in replacement on compatible electric and acoustic guitars.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Lubrication | Schaller special grease (permanently lubricated, maintenance-free) |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| 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 |
| Total Weight | 0.79 lb |
