Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding precision and velvet-smooth tuning performance with its refined 1:18 gear ratio. Continuing the legacy of the original closed-type tuner introduced in 1966, this modern version incorporates premium CNC-machined components and high-grade brass posts engineered for maximum tuning stability and wear resistance.
Featuring the innovative stepped M6 flanged washer, this tuning machine ensures effortless installation and solid post centering without requiring stepped bore holes in the headstock. This design eliminates tilting torque and reduces mechanical stress on both the string post and rear mounting screw.
Every closed unit is permanently lubricated with proprietary Schaller special grease for completely maintenance-free operation. Maintaining standard installation dimensions, the M6 90 allows for direct replacement on existing instruments without any structural modifications.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| 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), Pearloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) |
| Product Weight | 0.8 lb |
| Post Material | Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
