Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets a high standard for enclosed guitar tuning machines, featuring a precise 1:18 gear ratio that ensures velvet-smooth and exact tuning comfort. Building upon the legendary 1966 design, modern enhancements provide exceptional tuning stability and long-lasting performance.
Every component is CNC-machined to exact tolerances and surface-finished for premium durability. High-grade brass string posts are fitted directly into the housing, while the self-locking drive and Schaller special lubricant ensure maintenance-free, friction-free operation.
The innovative stepped M6 flanged collar reliably centers the string post via the banjo bolt, eliminating the need for stepped headstock drilling. This design absorbs lateral torque and mechanical stress to maintain effortless turning and prevent premature wear.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat |
| Flanged Collar Diameter | 0.39 in (10 mm) |
| Mounting Screw Size | M2.2 x 0.37 in (9.5 mm) |
| Weight per Tuner (Small / Large 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) |
| Post Material | Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
| Total Weight | 0.79 lb (0.36 kg) |
