Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents precision engineering with an advanced 1:18 gear ratio, delivering ultra-smooth and accurate tuning performance. Every component is CNC-machined to exact tolerances and finished to ensure lasting stability and fine adjustment via its self-locking drive mechanism.
Equipped with high-grade brass string posts engineered for wear-free durability, this machine head incorporates Schaller's innovative stepped flanged washer. This washer reliably centers the post through the banjo bolt and eliminates tilt torque without requiring stepped headstock drilling.
Permanently lubricated with Schaller special grease for maintenance-free operation, the M6 90 maintains identical installation dimensions to its predecessor for direct replacement on solid or slotted headstock instruments.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat |
| Single Tuner Weight with Button (Small/Large) | Metal: 1.27 oz / 1.34 oz (36 g / 38 g), Perloid: 1.06 oz / 1.09 oz (30 g / 31 g), Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) including banjo bolt |
| Mounting Screw Size | M2.2 x 0.37 in (9.5 mm) |
| Total Weight | 0.79 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
