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 operation. High-precision CNC-machined components and durable surface finishes ensure consistent performance and tuning stability across all applications.
Featuring high-grade brass string posts engineered for wear-free longevity, these enclosed machine heads are permanently lubricated with specialized Schaller grease for maintenance-free reliability. The innovative stepped flanged washer centers the string post reliably through the banjo bolt, eliminating tilt and removing stress from mounting screws without requiring stepped headstock drilling.
Designed with standard mounting dimensions identical to previous generations, the M6 90 serves as a direct drop-in replacement without modifying the guitar headstock.
| Brand | Schaller |
| Series | M6 Series |
| Product Type | Guitar Tuning Machines |
| Gear Ratio | 1:18 |
| Weight per Single Tuner with Button (Small/Large) | 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 Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Total Weight | 0.79 lb |
| String Post Material | Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
