Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents the pinnacle of closed tuning system engineering, featuring an advanced 1:18 gear ratio that ensures ultra-precise and smooth tuning response. Designed as a direct drop-in replacement, it shares the exact mounting dimensions of its iconic predecessor while introducing contemporary precision upgrades.
Every component is CNC-machined to exact tolerances and surface-finished for smooth, self-locking operation. The high-grade brass string posts are fitted securely into the housing to guarantee unmatched tuning stability, wear resistance, and long-lasting durability.
Engineered with an innovative stepped flanged washer, this tuning machine reliably centers the post without requiring stepped headstock drilling. This design eliminates tilting torque and relieves mechanical stress from both the post and mounting screw, backed by permanent internal lubrication with specialized grease.
| Brand | Schaller |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Weight | 0.13 lb |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Lubrication | Schaller Special Grease (Permanent) |
