Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents precision and performance in closed tuning machine design. Built with an improved 1:18 gear ratio, it provides accurate, smooth tuning and exceptional stability. All parts are precision CNC-machined and surface-finished to ensure consistent, maintenance-free operation lubricated by Schaller special grease.
Featuring high-grade brass posts engineered precisely into the housing, the M6 90 guarantees wear-free reliability and maximum tuning integrity. The innovative stepped M6 flanged washer centers the string post securely through the banjo bolt without requiring a stepped peghead bore, eliminating tilting torque and reducing mechanical stress.
Designed to match the exact mounting dimensions of previous iterations, the M6 90 allows for direct drop-in replacement without instrument modifications. Its self-locking drive mechanism provides delicate, stable adjustments across a versatile range of configurations and headstock applications.
| Brand | Schaller |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| 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 |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Product Weight | 0.79 lb |
| SKU | 10050623.04.37 |
| Series | M6 Series |
| Post Material | Brass |
| Mechanism | Closed / Sealed |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
