Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine features a precise 1:18 gear ratio that ensures velvet-smooth and exact tuning comfort. Building upon the legendary sealed design introduced in 1966, this updated version delivers unmatched tuning stability and mechanical precision.
Crafted with high-precision CNC machining and premium brass string posts, every component is engineered for wear-free durability. The closed housing comes permanently lubricated with Schaller special grease for a completely maintenance-free performance.
Featuring the innovative stepped M6 flanged washer, it eliminates tilting torque and centers the post effortlessly without requiring stepped headstock boreholes. It matches the original mounting dimensions, allowing direct replacement on existing headstocks without modification.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.13 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 |
| Button Bore Hole | 0.17 in diameter with 0.14 in drive flat |
| Post Material | Brass |
| Housing Type | Sealed / Enclosed |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
