Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision instrument engineering, featuring a refined 1:18 gear ratio that ensures velvet-smooth and exact tuning stability. Originally establishing the global benchmark for closed tuners in 1966, this updated iteration delivers state-of-the-art performance while maintaining its legendary character.
Every component is precision CNC-machined and surface-finished, incorporating a self-locking drive and premium brass string posts engineered to eliminate wear. The closed housings are permanently lubricated with Schaller special grease for completely maintenance-free operation over extended playing cycles.
Installation is streamlined through the innovative stepped M6 flanged washer, which centers the post reliably without requiring stepped headstock drilling. This smart design distributes mechanical load evenly across the mounting screw and string post, eliminating tilt torque and protecting your instrument's headstock.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| String Post Material | High-Grade Brass |
| Weight | 0.79 lb |
| Button Bore Hole | 0.17 in diameter with 0.14 in drive flat |
| Single Tuner Weight 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 |
| Lubrication | Permanently lubricated with Schaller special grease |
