Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents precision engineering with an advanced 1:18 gear ratio, delivering ultra-smooth and highly accurate tuning stability. Building on the legendary design of the original closed-housing tuner, this modernized version incorporates refined mechanics and superior handling for professional performance.
Crafted with CNC-machined components and high-grade brass posts fitted seamlessly into the housing, each unit ensures wear-free longevity and exceptional tuning security. Self-locking drive mechanics and internal permanent lubrication using specialized grease provide consistent, maintenance-free operation.
Featuring an innovative stepped flanged washer, the M6 90 eliminates tilt torque and centers the string post securely through the threaded bushing without requiring stepped headstock drilling. This design distributes mechanical pressure evenly, protecting the post and mounting screws while maintaining identical installation dimensions for straightforward drop-in replacements.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Model | M6 90 |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Button Bore Hole Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Lubrication | Schaller Special Grease (Permanent) |
| Weight per Single Tuner 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) |
| Product Weight | 0.79 lb |
