Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 tuning machine features an upgraded 1:18 gear ratio that delivers exceptional precision, smooth operation, and reliable tuning comfort. First setting the standard for closed tuning machines in 1966, this modern iteration pairs iconic engineering with cutting-edge innovations.
Precision CNC-machined components with self-locking mechanisms provide sensitive and stable tuning response. High-grade brass posts are seated directly within the housing for optimal wear resistance and tuning stability, while lifetime internal lubrication with specialized Schaller grease ensures completely maintenance-free performance.
Equipped with a stepped M6 flanged collar, installation is streamlined while reliably centering the string post via the hollow bolt without requiring stepped headstock holes. Sharing identical installation dimensions with its predecessor, the M6 90 offers effortless drop-in replacement across various guitar configurations.
| Brand | Schaller |
| 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), Pearloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including hollow bolt |
| Button Borehole | 0.17 in diameter with 0.14 in drive flat |
| Weight | 0.79 lb |
| String Post Material | Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
