Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers precise tuning performance and high tuning stability. Featuring an upgraded 1:18 gear ratio, this closed-type tuning machine ensures velvety smooth and exact adjustments for electric and acoustic guitars.
Precision CNC-machined components and high-grade brass posts guarantee wear-free operation and lasting durability. The self-locking drive and internal permanent lubrication with specialized grease provide completely maintenance-free functionality.
Equipped with an innovative stepped flanged washer, the M6 90 reliably centers the string post without requiring stepped headstock drilling. This design eliminates tilting torque and reduces mechanical stress on the mounting components, sharing identical installation dimensions with its predecessor for seamless drop-in replacement.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Product Weight | 0.13 lb |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Weight with Button per Unit (Small / Large) | Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including banjo bolt |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
