Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding precision and tuning comfort with its refined 1:18 gear ratio. Continuing the legacy of the original closed-housing design established in 1966, this model incorporates precision engineering to ensure smooth, sensitive, and stable tuning performance.
Every component is CNC-machined and finished to exact tolerances, featuring high-grade brass string posts engineered for maximum tuning stability and wear resistance. Permanent lubrication with Schaller specialized grease guarantees completely maintenance-free operation across the lifespan of the hardware.
Equipped with the innovative stepped M6 flanged washer, this tuning machine centers the string post securely through the banjobolt to eliminate tilting torque. It retains the classic mounting dimensions of previous generations, enabling direct drop-in replacement on compatible headstocks without modification.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Model | M6 90 |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Weight per Unit | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including banjobolt |
| Button Hole Dimensions | Diameter 0.17 in with driving flat 0.14 in |
| Material | Brass posts, CNC-machined components |
| Lubrication | Permanently lubricated with Schaller special grease |
| Weight | 0.13 lb |
