Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision instrument hardware, engineered with an advanced 1:18 gear ratio for exceptionally smooth and accurate tuning. Originally setting the global standard for closed-type tuning machines in 1966, this updated edition delivers reliable performance with cutting-edge manufacturing refinements.
Every component is precision CNC-machined, surface-finished, and equipped with a self-locking drive mechanism to ensure consistent, slip-free stability. High-grade brass string posts are fitted precisely into the housing to eliminate wear and optimize long-term durability, while internal Schaller specialty grease provides maintenance-free operation.
An innovative stepped M6 flanged washer centers the string post securely through the threaded bushing without requiring a stepped peghead hole, effectively removing tilt torque and lateral pressure. The M6 90 retains identical mounting dimensions to previous generations for seamless, direct replacement on compatible instruments.
| Brand | Schaller |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.8 lb |
| Post Material | High-grade Brass |
| Lubrication | Schaller Specialty Grease (Maintenance-Free) |
| 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) including hollow screw |
