Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers precise tuning with its refined 1:18 gear ratio and smooth mechanical operation. High-precision CNC machining and high-grade surface finishing ensure consistent, sensitive, and stable tuning performance across all applications.
Equipped with premium brass string posts precisely fitted into the housing, this machine head provides maximum tuning stability and wear resistance. The sealed housing comes permanently lubricated with Schaller special grease for entirely maintenance-free longevity.
Featuring the innovative stepped M6 flanged washer, it centers the string post securely through the banjo bolt without requiring a stepped headstock hole. This design eliminates tilting torque and protects both the post and rear mounting screws for a reliable installation.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Product Weight | 0.13 lb |
| String Post Material | Brass |
| Lubrication | Schaller special grease (maintenance-free) |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Weight per Single Unit with Button | 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 |
