Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets a benchmark in guitar tuning technology, featuring a precise 1:18 gear ratio for smooth, velvety, and exact tuning. Built upon the legacy of the original 1966 design, this closed tuning machine combines timeless aesthetic appeal with modern engineering improvements.
Every component is precision CNC-machined and surface-finished, featuring high-grade brass string posts engineered directly into the housing to ensure maximum tuning stability and zero wear. The permanently lubricated sealed housing utilizes Schaller special grease, rendering the entire mechanism completely maintenance-free.
An innovative stepped M6 flanged washer centers the string post securely via the banjo bolt, eliminating tilt torque and pressure on mounting screws without requiring stepped peghead bore holes. Featuring identical installation dimensions to its predecessor, it serves as an effortless drop-in replacement.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String Post Material | High-Grade Brass |
| Weight per Single Tuner with Button (Small / Large) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including banjo bolt |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with drive flat 0.14 in (3.6 mm) |
| Washer Diameter | 0.39 in (10 mm) |
| Lubrication | Schaller Special Grease (Permanently Lubricated) |
| Product Weight | 0.79 lb |
