Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine features a refined 1:18 gear ratio that delivers precise and velvety-smooth tuning. Built with high-precision CNC-machined components and surface finishing, the self-locking drive mechanism provides consistent, sensitive, and stable tuning performance.
All string posts are crafted from high-grade brass and fitted precisely into the housing to ensure optimal tuning stability and wear resistance. The enclosed housing is permanently lubricated with specialized Schaller grease for completely maintenance-free operation over its lifespan.
An innovative stepped M6 flanged washer centers the string post securely via the banjonut, eliminating tilting torque and removing pressure from both the post and rear mounting screw. Sharing identical mounting dimensions with its predecessor, it serves as a direct, modification-free replacement.
| Brand | Schaller |
| Model | M6 90 |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Weight | 0.13 lb |
| Weight per Single Tuner with Button (Small / Large) | Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including banjonut |
| Button Bore Hole | Diameter 0.17 in with driving surface 0.14 in |
| Lubrication | Permanently lubricated with Schaller special grease |
