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 delivers velvet-smooth tuning and exceptional pitch accuracy. Every component is CNC-machined to exact tolerances and surface-finished to ensure lasting stability and sensitive, backlash-free operation.
Equipped with high-grade brass string posts engineered directly into the housing, the M6 90 guarantees maximum tuning stability and wear resistance. The innovative stepped M6 flanged washer centers the string post securely through the threaded bushing without requiring stepped peghead counterbores, effectively eliminating tilting torque and reducing pressure on mounting screws.
Maintaining identical installation dimensions to its predecessor for effortless drop-in replacement, this closed tuning machine comes permanently lubricated with Schaller special grease for completely maintenance-free performance.
| Brand | Schaller |
| Model | M6 90 |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Button Bore Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Flanged Washer Diameter | 0.39 in (10 mm) |
| Mounting Screw Size | M2.2 x 9.5 |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Weight per Single Tuner (Metal Button) | 0.08 lb (36 g) small / 0.08 lb (38 g) large |
| Weight per Single Tuner (Perloid Button) | 0.07 lb (30 g) small / 0.07 lb (31 g) large |
| Weight per Single Tuner (Ebony Button) | 0.07 lb (30 g) small / 0.07 lb (31 g) large |
| Total Weight | 0.79 lb |
