Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding precision and tuning comfort with its refined 1:18 gear ratio. All components are CNC-machined to exact tolerances, surface-finished, and permanently lubricated with Schaller special grease for maintenance-free operation. High-grade brass string posts are precision-fitted into the housing to guarantee maximum tuning stability and wear resistance.
Featuring the innovative stepped M6 flanged washer, this tuning machine ensures smooth installation and rock-solid shaft centering without requiring a stepped headstock bore. The stepped washer design reliably eliminates tilting torque while taking pressure off both the string post and the rear mounting screw.
Sharing identical mounting dimensions with its classic predecessor, the M6 90 serves as a direct, modification-free replacement. Self-locking drive mechanisms and premium internal components ensure smooth, delicate, and reliable tuning performance across all configurations.
| Brand | Schaller |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Product Weight | 0.13 lb |
| Single Tuner Weight with Button (Small/Large) | Metal (0.079 lb / 0.084 lb), Perloid (0.066 lb / 0.068 lb), Ebony (0.066 lb / 0.068 lb) including threaded bushing |
| Button Bore Hole | Diameter 0.17 in with driving surface 0.14 in |
| String Post Material | Brass |
| Lubrication | Schaller Special Grease (Permanently Lubricated) |
