Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine features a precise 1:18 gear ratio that ensures ultra-smooth, fine-tuned, and stable string tension. Designed with high-precision CNC-machined components and surface finishes, it delivers reliable self-locking drive performance without string slippage.
Crafted with premium brass string posts precisely fitted into the housing, this enclosed tuner guarantees maximum tuning stability and wear resistance. The innovative stepped M6 flanged washer centers the string post via the banjo bolt, eliminating tilting moment and removing pressure from both the post and rear mounting screw.
Permanently lubricated with Schaller special grease, the M6 90 is entirely maintenance-free and matches the original installation dimensions for seamless drop-in replacement without headstock modifications.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat |
| Product Weight | 0.8 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 banjo bolt |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
