Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets a benchmark for closed tuning machines, engineered with a precise 1:18 gear ratio for smooth, accurate, and stable tuning. Each unit features high-precision CNC-machined components with a self-locking drive mechanism and premium brass string posts engineered for maximum durability and tuning retention.
Equipped with an innovative stepped M6 flanged washer, this tuning machine simplifies installation and ensures permanent, solid centering of the post. The 0.39-inch (10 mm) diameter stepped base secures through the threaded bushing, eliminating the need for step-drilled headstock holes while reducing tilting torque and mechanical strain.
Designed with maintenance-free closed construction, all internal gears are permanently lubricated with proprietary Schaller special grease. The M6 90 shares identical mounting dimensions with legacy M6 models, allowing straightforward retrofitting without body or headstock modifications.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Product Weight | 0.79 lb |
| Button Hole Diameter | 0.17 in with 0.14 in drive flat |
| Lubrication | Schaller special grease (permanently lubricated) |
