Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding precision and smooth tuning comfort with an upgraded 1:18 gear ratio. Continuing the legacy of the original sealed tuner introduced in 1966, this model incorporates refined CNC-machined components and advanced design features.
Equipped with high-grade brass string posts engineered for maximum tuning stability, each unit features self-locking drive mechanisms to ensure wear-free performance. High-precision manufacturing and special internal permanent lubrication keep these enclosed tuners completely maintenance-free.
An innovative stepped flanged washer centers the string post securely over the banjo bolt, eliminating tilting friction and protecting mounting hardware without requiring stepped peghead drilling. Direct-replacement dimensions allow easy installation without instrument modifications.
| Brand | Schaller |
| Model | M6 90 |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Housing Type | Sealed / Enclosed |
| Post Material | Brass |
| Button Bore Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Single Tuner Weight with Button (Small/Large) | Metal (1.27 oz / 1.34 oz), Pearloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including hollow screw |
| Product Weight | 0.79 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
