Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 represents the pinnacle of closed tuning machine engineering, setting industry benchmarks for precision and durability. Built with an enhanced 1:18 gear ratio, this model delivers velvety-smooth rotation and ultra-precise tuning adjustment. Every component is CNC-machined to exact tolerances, finished with premium surface treatments, and driven by a self-locking mechanism for rock-solid pitch stability.
Crafted with premium brass string posts fitted seamlessly into the housing, the M6 90 prevents wear and guarantees lasting performance. The innovative stepped M6 flanged washer centers the string post precisely via the banion screw, eliminating tilting moments and removing stress from both the post and rear mounting screws without requiring stepped headstock drilling. Permanently lubricated with specialized Schaller grease, each enclosed unit provides entirely maintenance-free operation.
Engineered with identical mounting dimensions to its classic predecessor, the M6 90 serves as a direct drop-in replacement that requires no headstock modifications. It accommodates solid, slotted, locking, and top-locking configurations to suit various performance requirements and player preferences.
| Brand | Schaller |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Weight per Unit with Button (Small/Large) | Metal (1.3 oz / 1.3 oz), Perloid (1.1 oz / 1.1 oz), Ebony (1.1 oz / 1.1 oz) including hollow screw |
| Button Bore Hole | Diameter 0.17 in with drive surface 0.14 in |
| Item Weight | 0.8 lb |
| Material | Brass / Metal |
| Housing Type | Enclosed |
| Lubrication | Maintenance-free internal grease |
