Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding tuning precision and smooth operation with its refined 1:18 gear ratio. All components are CNC-machined to exacting tolerances and surface-finished, featuring a self-locking drive mechanism that ensures stable and wear-free performance.
Equipped with high-grade brass string posts engineered for optimal fit, these sealed tuners come permanently lubricated with Schaller special grease for completely maintenance-free functionality. The innovative stepped M6 flanged washer centers the string post precisely through the banjo bolt, eliminating tilting moment and headstock stress without requiring stepped peghead drilling.
Designed with identical mounting dimensions to its classic predecessor, the M6 90 serves as a direct drop-in replacement for standard guitar headstocks. It maintains exceptional pitch stability across multiple configurations, whether utilizing standard solid, slotted, or locking post systems.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String Post Material | High-Grade Brass |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight | 0.13 lb |
| Weight per Single Tuner with Button (Small / Large) | Metal: 1.27 oz / 1.34 oz (36 g / 38 g); Pearloid: 1.06 oz / 1.09 oz (30 g / 31 g); Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Flanged Washer Diameter | 0.39 in (10 mm) |
