Schaller M6 90 Tuning Machines
The Schaller M6 90 tuning machines deliver precision engineering and exceptional tuning stability. Featuring an improved 1:18 gear ratio, these enclosed tuners provide a smooth, velvety tuning feel and precise adjustments. Every component is CNC-machined to exacting tolerances and treated with a durable surface finish.
Equipped with high-grade brass string posts engineered directly into the housing, the M6 90 ensures maximum wear resistance and rock-solid pitch retention. The stepped M6 flanged washer centers the post securely through the hollow screw, removing tension from both the post and mounting screw without requiring step-drilled headstock holes.
Permanently lubricated with Schaller special grease, these sealed tuners are completely maintenance-free. Designed with identical mounting dimensions to prior generations, they allow for direct drop-in replacement on compatible electric and acoustic guitar headstocks.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machines |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Button Bore Hole Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight | 0.79 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
