Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents precision engineering with an advanced 1:18 gear ratio, delivering ultra-smooth, fine, and reliable tuning stability. CNC-machined components with premium surface finishes and a self-locking drive mechanism ensure consistent and friction-free performance across every rotation.
Crafted with premium brass string posts precisely fitted into the housing, this tuning machine provides maximum wear resistance and tuning retention. The innovative stepped M6 collar washer centers the string post flawlessly via the banjo bolt, eliminating tilt and removing stress from both the post and the rear mounting screw without requiring stepped peghead drilling.
Permanently lubricated with Schaller special grease for completely maintenance-free operation, the M6 90 shares identical installation dimensions with its predecessor model, allowing seamless drop-in replacement and straightforward upgrades.
| Brand | Schaller |
| Series | M6 Series |
| 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 0.14 in (3.6 mm) drive flat |
| Weight per Single Tuner with Button (Small / Large) | 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) |
| Estimated Shipping Weight | 0.13 lb |
| Lubrication | Permanently lubricated with Schaller special grease (maintenance-free) |
| Collar Washer Diameter | 0.39 in (10 mm) |
