Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision German engineering, establishing a modern standard for enclosed machine heads. Featuring an upgraded 1:18 gear ratio, it delivers ultra-precise, velvety smooth tuning action with exceptional pitch stability. Every component is CNC-machined to exact tolerances, surface-finished, and permanently lubricated with Schaller special grease for completely maintenance-free operation.
Equipped with solid brass string posts precisely fitted into the housing, the M6 90 guarantees maximum wear resistance and zero backlash. The innovative stepped M6 flanged washer features a 0.39 in (10 mm) diameter base step that reliably centers the string post via the hollow bolt, eliminating the need for stepped peghead boreholes. This design effectively removes tilting torque and relieves mechanical stress from both the post and rear mounting screws.
Engineered with identical mounting dimensions to its legacy predecessor, the M6 90 drops directly into existing headstock configurations without required modifications. High-grade internal components combined with a self-locking drive ensure sensitive, consistent, and dependable tuning for demanding playing conditions.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Button Borehole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Single Tuner Weight 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 hollow screw |
| Product Weight | 0.79 lb |
