Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents precision engineering with a refined 1:18 gear ratio, delivering velvety-smooth and exact tuning accuracy. Building on the benchmark set by the original 1966 design, this closed tuning machine integrates state-of-the-art manufacturing while maintaining classic performance standards.
Every component is CNC-machined to exacting tolerances and features high-grade brass string posts precisely seated within the housing for optimal tuning stability and wear resistance. Permanent lubrication with specialized grease ensures completely maintenance-free operation across years of play.
Equipped with an innovative stepped flanged washer with a 0.39-inch diameter, the assembly self-centers the string post through the banjofit screw to eliminate tilting torque without requiring stepped headstock routing. Matching the exact installation dimensions of legacy models, it serves as a seamless drop-in replacement.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.79 lb |
| Single Tuner Weight (Small/Large Button) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including banjofit screw |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Post Material | High-Grade Brass |
| Washer Diameter | 0.39 in (10 mm) |
| Included Screws | 6x M2.2 x 0.37 in (9.5 mm) |
