Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision instrument hardware engineered with an upgraded 1:18 gear ratio for smooth, velvety, and exact tuning adjustments. Each component is CNC-machined and surface-treated, featuring a self-locking drive that provides unyielding tuning stability.
Crafted with premium brass string posts fitted directly into the enclosed housing, this tuner prevents wear and ensures maximum mechanical durability. The innovative stepped M6 flanged washer centers the string post precisely via the banjo bolt, eliminating tilt and removing lateral pressure from both the post and mounting screw without requiring stepped headstock drilling.
Permanently lubricated with Schaller special grease, these maintenance-free tuning machines retain identical installation dimensions to their historic predecessor, making direct replacements and upgrades seamless. Engineered for performance, they provide flawless functionality across a wide range of configuration options.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Lubrication | Schaller Special Grease (Permanently Lubricated) |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight per Single Unit 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 | 0.13 lb |
