Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets a benchmark for closed guitar tuning machines, combining timeless design with modern engineering. Engineered with an improved 1:18 gear ratio, it delivers velvety-smooth, highly precise, and consistent tuning performance. Every component is CNC-machined to exacting tolerances to ensure uniform action and exceptional tuning stability.
Crafted with premium brass posts fitted directly into the housing, this machine head offers maximum wear resistance and dependable durability over extensive use. The closed housing design features permanent lubrication with Schaller special grease, making the entire mechanism completely maintenance-free.
Installation is straightforward thanks to the innovative stepped M6 flanged washer, which centers the string post securely without requiring stepped peghead boreholes. Retaining the classic installation dimensions of its predecessor, the M6 90 serves as a seamless upgrade or replacement for precision instrument setups.
| Brand | Schaller |
| Manufacturer | Schaller GmbH |
| Model | M6 90 |
| Product Number / SKU | 10050170.06.36 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight per Single Tuner with Button | Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including banjo bolt |
| Button Hole Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Post Material | Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
| Weight | 0.79 lb |
