Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers precise and smooth tuning performance with its refined 1:18 gear ratio. Engineered with CNC-machined components and premium brass posts, it guarantees exceptional tuning stability, self-locking drive efficiency, and long-term wear resistance.
Featuring the innovative stepped M6 flanged washer, this tuner allows straightforward mounting without the need for a stepped peghead hole. The stepped base accurately centers the string post via the banjo bolt, eliminating tilt torque and protecting both the post and rear mounting screws from excess strain.
Permanently lubricated with Schaller special grease, the sealed housing provides maintenance-free operation. Designed to match the exact mounting dimensions of previous generations, it serves as a direct, drop-in replacement upgrade for modern and vintage instruments alike.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Individual Tuner Weight (Metal Button) | 0.08 lb (36 g) / 0.08 lb (38 g) |
| Individual Tuner Weight (Perloid Button) | 0.07 lb (30 g) / 0.07 lb (31 g) |
| Individual Tuner Weight (Ebony Button) | 0.07 lb (30 g) / 0.07 lb (31 g) |
| Product Weight | 0.13 lb |
