Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision instrument engineering, featuring a refined 1:18 gear ratio that delivers smooth, velvety tuning and exceptional pitch accuracy. Built with CNC-machined components and self-locking drive mechanics, it ensures consistent tension, sensitive adjustment, and dependable tuning stability across all playing conditions.
Crafted with premium brass string posts and permanently lubricated with proprietary Schaller grease, each enclosed unit operates completely maintenance-free. The innovative stepped M6 flanged washer centers the string post securely through the banjo bolt without requiring stepped headstock drilling, eliminating tilt torque and reducing stress on mounting hardware.
Featuring the exact installation footprint of classic predecessors, these tuning machines allow for seamless replacement and retrofitting on electric and acoustic instruments without headstock modifications.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Weight | 0.8 lb |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat |
| Weight per Unit (Small/Large Button) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) |
