Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers precise tuning performance with an upgraded 1:18 gear ratio for smooth, accurate adjustments. CNC-machined components and a self-locking drive ensure velvet-smooth operation, sensitive response, and maximum tuning stability.
Equipped with high-grade brass string posts engineered for wear-free durability, each enclosed tuner is permanently lubricated with Schaller special grease for completely maintenance-free operation over its lifespan.
An innovative stepped collar design centers the post directly through the banjo bolt, eliminating tilting friction, protecting the mounting hardware, and allowing effortless installation without headstock modifications.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight | 0.79 lb |
| Single Tuner Weight with Button (Small/Large) | Metal (1.27 oz / 1.34 oz), Pearloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including banjo bolt |




















