Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 tuning machine sets an industry benchmark for precision and stability, featuring an upgraded 1:18 gear ratio that ensures smooth and accurate tuning. Engineered with high-precision CNC-machined components and self-locking drive mechanics, it provides reliable performance and delicate tuning response.
Crafted with premium brass string posts precisely fitted into sealed housings, each unit is permanently lubricated with Schaller special grease for completely maintenance-free operation. The stepped M6 flanged washer centers the string post securely through the banjo bolt, eliminating tilt torque and protecting against mechanical wear without requiring stepped headstock drilling.
Designed with identical mounting dimensions to its classic predecessor, the M6 90 allows for seamless replacement without headstock modifications. Premium surface finishes and robust metal construction ensure exceptional tuning stability, durability, and lasting aesthetic quality on solid or slotted headstocks.
| Brand | Schaller |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Material | Brass, Metal |
| Post Weight (Small / Large Button) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) |
| Button Bore Hole | 0.17 in diameter with 0.14 in drive flat |
| Product Weight | 0.13 lb |
| Lubrication | Permanently lubricated (maintenance-free) |
