Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 series guitar tuning machine sets an industry standard for closed tuning machines, combining timeless design with modern engineering. Featuring a refined 1:18 gear ratio, it delivers ultra-precise, velvety-smooth tuning response and superior tuning stability across all playing styles.
Precision-engineered with CNC-machined components and high-grade brass string posts, every tuner is permanently lubricated with proprietary Schaller grease to ensure entirely maintenance-free operation. The self-locking drive mechanism guarantees smooth, sensitive, and backlash-free adjustments during stage and studio performance.
Equipped with an innovative stepped collar washer, this tuner aligns the post seamlessly through the banjo bolt without requiring stepped headstock drilling. This design eliminates tilting torque and reduces mechanical strain on both the string post and rear mounting screws for extended lifespan.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Model | M6 90 |
| SKU | 10050523.06.36 |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Button Borehole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Collar Washer Diameter | 0.39 in (10 mm) |
| Weight per Single Tuner with Button (Small/Large) | Metal (0.079 lb / 0.084 lb), Perloid (0.066 lb / 0.068 lb), Ebony (0.066 lb / 0.068 lb) including banjo bolt |
| Product Weight | 0.79 lb |
| Mounting Screws Included | 6 x M2, 0.08 in x 0.37 in (2 x 9.5 mm) |
| Lubrication | Permanently lubricated with Schaller special grease |
