Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets the benchmark for closed guitar tuning machines with an advanced 1:18 gear ratio that provides velvety-smooth action, precise tuning stability, and exceptional accuracy. All components are precision CNC-machined and finished to ensure flawless, maintenance-free performance supported by self-locking drives and permanent internal lubrication.
Constructed with high-grade brass string posts engineered specifically for wear resistance, this design ensures rock-solid pitch retention. The stepped M6 flanged washer centers the post automatically through the banjo bolt, eliminating the need for stepped peghead drilling while absorbing mechanical tension and removing tilting torque entirely.
Engineered with identical footprint dimensions to its predecessor, the M6 90 serves as a direct drop-in replacement without requiring headstock modifications. Each complete set includes precision threaded bushings, stepped flanged washers, and high-tensile mounting screws for a reliable installation.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| SKU | 1005 |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Product Weight | 0.79 lb |
| Single Tuner 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 (including banjo bolt) |
| Button Borehole | 0.17 in diameter with 0.14 in drive flat |
| Mounting Screw Size | M2.2 x 0.37 in |
