Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision engineering with an advanced 1:18 gear ratio, delivering ultra-smooth and accurate tuning performance. Every component is CNC-machined to exacting standards and surface-finished to ensure lasting durability and reliable self-locking stability.
Featuring high-grade brass string posts and factory permanent lubrication with Schaller special grease, these sealed tuning machines offer completely maintenance-free operation and supreme wear resistance. The innovative stepped M6 flanged washer centers the post securely through the banjo bolt, eliminating tilt torque and protecting headstocks without requiring stepped bore drilling.
Designed with standard mounting dimensions identical to previous generations, the M6 90 allows for seamless direct replacement and straightforward installation across compatible solid and slotted headstock instruments.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Weight with Button per Single Tuner (Small/Large) | Metal (0.08 lb / 0.08 lb), Pearloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including banjo bolt |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Post Material | High-Grade Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Product Weight | 0.79 lb |
