Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding precision and smooth tuning action with an advanced 1:18 gear ratio. All components are CNC-machined to exact tolerances and permanently lubricated with Schaller special grease for maintenance-free reliability.
Crafted with premium brass string posts precision-fitted into the housing, this machine head provides maximum tuning stability and wear resistance. The self-locking drive ensures smooth, sensitive, and stable tuning performance across all playing conditions.
An innovative stepped M6 flanged washer reliably centers the string post without requiring a stepped peghead bore, eliminating tilting torque and reducing pressure on mounting screws. Identical in installation dimensions to previous iterations, it offers seamless replacement and direct fitment.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Model | M6 90 |
| Series | M6 Series |
| SKU | 10050171.06.55 |
| Gear Ratio | 1:18 |
| Post Material | High-Grade Brass |
| Weight | 0.79 lb |
| Weight per Single Tuner (Small / Large Button) | Metal: 1.27 oz / 1.34 oz, Perloid: 1.06 oz / 1.09 oz, Ebony: 1.06 oz / 1.09 oz |
| Button Bore Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) flat driving surface |
| Stepped Washer Diameter | 0.39 in (10 mm) |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
