Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high precision and refined engineering. Featuring an upgraded 1:18 gear ratio, it provides unmatched tuning accuracy and exceptionally smooth operation. All components are CNC-machined to precise tolerances and surface-finished to deliver balanced, sensitive, and reliable performance.
Built with durable brass string posts precision-fitted into the housing, the M6 90 ensures maximum tuning stability and wear resistance. The innovative stepped M6 flanged washer centers the string post securely through the banjo bolt, eliminating tilting friction and removing stress from both the post and rear mounting screw without requiring stepped peghead drilling.
Each closed machine head is permanently lubricated with Schaller special grease for completely maintenance-free longevity. Designed with identical mounting dimensions to its classic predecessor, the M6 90 allows for direct, modification-free replacement on compatible headstocks.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Single Unit Weight with Metal Button (Small/Large) | 1.27 oz / 1.34 oz (36 g / 38 g) |
| Single Unit Weight with Perloid Button (Small/Large) | 1.06 oz / 1.09 oz (30 g / 31 g) |
| Single Unit Weight with Ebony Button (Small/Large) | 1.06 oz / 1.09 oz (30 g / 31 g) |
| Total Weight | 0.79 lb |
