Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents precision engineering with an advanced 1:18 gear ratio, delivering ultra-smooth, sensitive, and stable tuning performance. Built to the legendary standard established by the original sealed M6 in 1966, this upgraded model features CNC-machined brass string posts and high-grade internal components engineered for frictionless operation and long-term durability.
Featuring the innovative stepped flanged washer, the M6 90 ensures solid post alignment and hassle-free installation directly through the headstock bushing, eliminating the need for stepped hole routing while removing lateral pressure from both the post and rear mounting screw. Every internal mechanism is permanently lubricated with Schaller special grease for completely maintenance-free functionality.
Designed with standard mounting dimensions identical to its predecessor, the M6 90 functions as a direct, modification-free replacement tuning peg for a wide range of electric and acoustic headstock configurations.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Weight | 0.79 lb |
| Button Bore Hole Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) flat |
| Weight per Single Unit (Small/Large Button) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) |
