Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 Guitar Tuning Machine sets an industry standard for enclosed machine heads, featuring an upgraded 1:18 gear ratio that delivers exceptional tuning comfort and velvet-smooth, precise adjustments. Built with high-precision CNC-machined components and high-grade brass posts, it guarantees long-term durability, wear-free performance, and reliable tuning stability.
Featuring the innovative stepped flanged collar, this tuning machine reliably centers the string post through the banjo bolt without requiring a stepped headstock bore. This specialized design eliminates tilting moments and reduces mechanical stress on both the string axis and rear mounting screws, while internal Schaller specialty grease ensures completely maintenance-free, lifetime operation.
Designed with the exact same installation dimensions as its classic predecessor, the M6 90 allows for direct, seamless replacement on standard guitar headstocks without modifications. Each set includes precision mounting screws, stepped washers, and banjo bolts to provide a solid, professional-grade installation for demanding musicians.
| 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 banjo bolt |
| Button Bore Hole | 0.17 in diameter with 0.14 in drive flat |
| Product Weight | 0.79 lb |
| Brand | Schaller |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Post Material | Brass |
| Lubrication | Schaller Specialty Grease (Maintenance-Free) |
