Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers precise tuning and smooth action powered by an upgraded 1:18 gear ratio. Designed to set the standard for enclosed tuners, it offers unmatched reliability and refined performance for modern instruments.
Crafted with precision CNC machining and high-grade brass string posts, every component fits seamlessly into the housing to ensure optimal tuning stability and wear-free operation. Permanent internal lubrication with specialized Schaller grease ensures completely maintenance-free functionality.
Featuring the innovative stepped M6 flanged washer, this tuner aligns the post centrally without requiring stepped headstock drilling. This design eliminates tilting torque, protects the mounting screw, and matches the installation dimensions of previous models for hassle-free upgrades.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight | 0.13 lb |
| Lubrication | Maintenance-Free Special Grease |





















