Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 Guitar Tuning Machine sets a high standard for closed tuning systems, featuring an advanced 1:18 gear ratio for precision and smooth tuning control. Crafted with CNC-machined components and premium brass string posts, it ensures long-term tuning stability and wear resistance.
Featuring the innovative stepped M6 flanged washer, this tuning machine simplifies installation by reliably centering the string post without requiring a stepped peghead bore. This design eliminates tilting torque and reduces mechanical stress on both the post and rear mounting screws.
Each unit is permanently lubricated with Schaller special grease for maintenance-free operation. Maintaining identical mounting dimensions to its historic predecessor, the M6 90 allows for seamless direct replacement on compatible instruments.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | High-Grade Brass |
| Manufacturing | Precision CNC-Machined |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat |
| Flanged Washer Diameter | 0.39 in (10 mm) |
| Single Unit Weight (Metal Button) | 0.08 lb (36 g) / 0.08 lb (38 g) |
| Single Unit Weight (Perloid/Ebony Button) | 0.07 lb (30 g) / 0.07 lb (31 g) |
| Product Weight | 0.13 lb |
