Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision engineering with an advanced 1:18 gear ratio, delivering ultra-smooth and accurate tuning response. Designed as an evolution of the industry-standard closed tuning machine, it features CNC-machined brass string posts and components tailored for exceptional tuning stability and long-lasting durability.
Featuring the stepped M6 collar washer design, this tuning machine simplifies installation by reliably centering the string post through the banjo bolt without requiring a stepped headstock bore. This innovation effectively eliminates tilt torque and reduces physical stress on both the post and the rear mounting screw.
Permanently lubricated with Schaller special grease for maintenance-free operation, the M6 90 matches the exact installation dimensions of its predecessor for seamless drop-in replacement. Its self-locking drive and premium craftsmanship ensure consistent, sensitive tuning performance across all configurations.
| Brand | Schaller |
| Model | M6 90 |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Product Weight | 0.13 lb |
| Weight per Single Tuner with Button (Small/Large) | Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including banjo bolt |
| Button Bore Hole | 0.17 in diameter with 0.14 in drive flat |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
