Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision engineering with an advanced 1:18 gear ratio, delivering velvet-smooth operation and unmatched tuning accuracy. Built upon the legacy of the original 1966 closed-housing design, this modernized iteration features CNC-machined components and self-locking drive technology for exceptional long-term stability.
Crafted with premium brass string posts precision-fitted into the housing, the M6 90 ensures maximum wear resistance and zero backlash. The innovative stepped M6 flanged washer centers the post reliably via the threaded bushing, eliminating the need for a stepped headstock hole and completely preventing tilting torque.
Permanently lubricated with Schaller special grease, this enclosed machine head is entirely maintenance-free and shares identical installation dimensions with previous models for direct drop-in replacement.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Model | M6 90 |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Lubrication | Maintenance-free Schaller Special Grease |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Product Weight | 0.13 lb |
| Weight per Single Unit with Button | 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 threaded bushing |
