Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding precision and tuning comfort with its improved 1:18 gear ratio. Continuing the legacy of the original sealed tuner introduced in 1966, this model features high-precision CNC-machined components and a self-locking drive for smooth, reliable, and wear-free tuning performance.
Equipped with high-grade brass string posts engineered for maximum stability, the M6 90 incorporates an innovative stepped flanged washer. This 0.39-inch diameter stepped collar centers the post through the threaded bushing without requiring stepped headstock holes, eliminating tilt and relieving mechanical stress from both post and mounting screw.
Permanently lubricated with Schaller special grease for completely maintenance-free operation, the M6 90 matches the exact mounting dimensions of its predecessor for effortless drop-in replacement on compatible headstocks.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| 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 threaded bushing |
| Button Bore Hole | 0.17 in diameter with 0.14 in drive flat |
| String Post Material | Brass |
| Lubrication | Maintenance-free grease lubrication |
| Weight | 0.79 lb |
