Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high precision and tuning comfort with its improved 1:18 gear ratio. Each component is CNC-machined to exact tolerances, delivering a smooth, velvety tuning feel and exceptional pitch stability through its self-locking drive mechanism.
Featuring high-grade brass string posts engineered for wear-free performance, the M6 90 incorporates an innovative stepped flanged washer with a 10 mm (0.39 in) diameter. This design reliably centers the post without requiring a stepped headstock hole, eliminating tilt torque and protecting mounting hardware from stress.
All enclosed housings are permanently lubricated with Schaller specialized grease for completely maintenance-free operation. Maintaining identical installation dimensions to its predecessor, it serves as a seamless replacement upgrade for modern and vintage instruments alike.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.79 lb |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Weight per Single Tuner 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 banjonut |
| Post Material | Brass |
| Lubrication | Permanent Special Grease Lubrication |
