Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers state-of-the-art precision and exceptional tuning comfort backed by a refined 1:18 gear ratio. Designed as an evolution of the industry-standard closed tuner introduced in 1966, this model matches the exact mounting dimensions of its predecessor for effortless, modification-free replacement.
Every component is CNC-machined to exact tolerances and finished to ensure velvet-smooth operation. Solid brass string posts fitted precisely into the housing provide unmatched tuning stability and wear resistance, while Schaller special grease permanently lubricates the closed housing for maintenance-free reliability.
Featuring the innovative stepped M6 flanged washer, this tuner reliably centers the string post through the headstock without requiring stepped drilling. This design eliminates tilting torque and relieves mechanical stress from both the post and rear mounting screws.
| Gear Ratio | 1:18 |
| Weight per Single Tuner with Button | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including banjo bolt |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Brand | Schaller |
| Series | M6 Series |
| Housing Type | Closed / Sealed |
| Post Material | Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
| Mounting Pin / Screw Angle | 90 Degree |
