Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents the benchmark for enclosed tuners, featuring an upgraded 1:18 gear ratio that delivers exceptional tuning precision and ultra-smooth operation. Every component is CNC-machined to exacting tolerances and surface-finished, while the self-locking drive mechanism ensures consistent, highly responsive tuning stability.
Crafted with premium brass string posts fitted directly into the housing, the M6 90 ensures maximum wear resistance and pitch stability. The stepped M6 collar washer centers the string post securely without requiring stepped peghead drilling, eliminating tilting moments and relieving stress from both the post and rear mounting screws.
Engineered for effortless drop-in replacement, the M6 90 matches the exact mounting dimensions of previous generation models for seamless installation. All enclosed tuner units are permanently lubricated with Schaller special grease for a completely maintenance-free service life.
| Brand | Schaller |
| Model | M6 90 |
| Product Line | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Button Borehole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight per Single Tuner with Button (Small/Large) | Metal: 1.27 oz / 1.34 oz (36 g / 38 g), Perloid: 1.06 oz / 1.09 oz (30 g / 31 g), Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) (including banjo bolt) |
| Product Weight | 0.8 lb |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
