Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 represents the modern standard for enclosed guitar tuning machines, offering flawless functionality combined with a refined 1:18 gear ratio for smooth, precise, and effortless tuning. Every component is CNC-machined to exact tolerances and permanently lubricated with Schaller special grease to provide completely maintenance-free operation and exceptional tuning stability.
Equipped with high-grade brass posts precision-fitted into the housing, the M6 90 prevents wear and maximizes long-term reliability. The innovative stepped flanged washer centers the string post securely without requiring stepped peghead counterbores, effectively eliminating tilting moments and reducing mechanical stress on mounting screws and shafts.
Engineered to match the exact mounting dimensions of previous generation models, this tuning machine enables seamless retrofitting and drop-in replacement across compatible solid and slotted headstocks.
| 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 screw |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Product Weight | 0.79 lb |
| Brand | Schaller |
| Series | M6 Series |
| Post Material | Brass |
| Lubrication | Schaller Special Grease, Permanently Lubricated |
