Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding precision and smooth operation thanks to an advanced 1:18 gear ratio. CNC-machined components and precision-fitted brass string posts provide exceptional tuning stability and completely wear-free performance for discerning musicians.
Featuring the innovative stepped M6 flanged washer, this tuning machine simplifies installation by reliably centering the string post via the banjo bolt. This engineering breakthrough eliminates tilt torque and relieves strain on both the string post and rear mounting screw without requiring stepped peghead holes.
Built with permanently lubricated Schaller special grease, the enclosed housing is entirely maintenance-free. Designed to match standard vintage and modern dimensions, it offers a seamless retrofit without headstock modifications.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Flanged Washer Diameter | 0.39 in |
| Button Bore Hole | 0.17 in diameter with 0.14 in driving surface |
| Weight with Button per Single Tuner (Small) | Metal 0.08 lb, Perloid 0.07 lb, Ebony 0.07 lb (including banjo bolt) |
| Weight with Button per Single Tuner (Large) | Metal 0.08 lb, Perloid 0.07 lb, Ebony 0.07 lb (including banjo bolt) |
| Post Material | Brass |
| Weight | 0.13 lb |
