Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets the benchmark for enclosed guitar tuning machines, offering an improved 1:18 gear ratio for velvety smooth and precise tuning. High-precision CNC-machined components with refined surface finishes ensure delicate, even, and reliable operation across all playing styles.
Featuring high-grade brass string posts engineered precisely into the housing, this machine delivers optimal tuning stability and zero wear. The innovative stepped M6 flanged washer centers the post securely through the banjo bolt without requiring a stepped peghead hole, effectively eliminating tilting moments and relieving stress on mounting screws.
Permanently lubricated with Schaller special grease for entirely maintenance-free performance, the M6 90 shares the identical installation dimensions of its historic predecessor for seamless, modification-free retrofitting.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String Post Material | High-Grade Brass |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Weight per Single Tuner with Button (Small/Large) | Metal (1.27 oz / 1.34 oz), Pearloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) |
| Product Weight | 0.13 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
