Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 tuning machine combines legendary design with advanced engineering to provide outstanding tuning comfort and precision. Engineered with a 1:18 gear ratio, it ensures an ultra-smooth, responsive, and reliable tuning experience. Every component is CNC-machined to exacting tolerances and surface-finished for smooth operation, backed by high-grade brass posts precisely fitted into the housing for maximum stability.
Featuring the innovative stepped M6 flanged washer, this tuning machine simplifies installation while delivering enduring shaft centering. The integrated step on the base of the washer eliminates tilting torque and absorbs stress from both the string post and rear fixing screw, eliminating the need for a stepped headstock hole. The closed-gear mechanism is permanently lubricated with proprietary grease for maintenance-free performance.
Sharing identical installation dimensions with its classic predecessor, the M6 90 serves as a direct drop-in replacement without requiring headstock modifications. Premium brass string posts and self-locking drive mechanics ensure long-term tuning stability and wear resistance across diverse playing styles.
| Brand | Schaller |
| Manufacturer | Schaller GmbH |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Shaft Material | Brass |
| Weight | 0.79 lb |
| Single Tuner Weight with Button (Small/Large) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including hollow screw |
| Button Bore Hole | 0.17 in diameter with 0.14 in driving surface |
| Lubrication | Permanent grease lubrication (maintenance-free) |
