Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers precise tuning comfort and reliable performance with an upgraded 1:18 gear ratio. All structural components are CNC-machined to exacting tolerances, surface-finished, and permanently lubricated with proprietary grease for completely maintenance-free operation.
Equipped with high-grade brass string posts precisely fitted into the housing, this closed machine head ensures maximum tuning stability and wear resistance. The stepped M6 flanged washer centers the string post securely without requiring stepped headstock drilling, removing tilt moment and reducing mechanical stress.
Featuring the exact installation dimensions of its predecessor, the M6 90 allows for seamless direct replacement on existing instruments. Precision self-locking drive engineering provides a smooth, sensitive tuning feel suitable for professional musical performance.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat |
| Weight per Single Tuner | Metal: 1.27–1.34 oz (36–38 g), Perloid: 1.06–1.09 oz (30–31 g), Ebony: 1.06–1.09 oz (30–31 g) |
| Product Weight | 0.79 lb (0.36 kg) |
