Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents precision engineering with a refined 1:18 gear ratio for smooth, accurate tuning. Building upon the legacy of the original 1966 closed-back tuner, this updated model delivers exceptional tuning stability and effortless operation for high-performance instruments.
Crafted with precision CNC machining and premium brass string posts, each component is perfectly fitted into the housing to ensure wear-free longevity. The sealed design is permanently lubricated with Schaller special grease, providing completely maintenance-free functionality over extended playing life.
Featuring the innovative stepped M6 flanged washer, this tuner allows straightforward installation while securely centering the string post without requiring a stepped headstock bore. It maintains identical mounting dimensions to its predecessor, allowing seamless drop-in replacement on compatible guitars.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| 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 |
| Individual Tuner Weight with Button (Small/Large) | Metal: 1.27 oz / 1.34 oz (36 g / 38 g); Pearloid: 1.06 oz / 1.09 oz (30 g / 31 g); Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) |
| Product Weight | 0.79 lb |
| Mounting Type | 90-degree rear mounting tab |
| Lubrication | Permanently lubricated with Schaller special grease |
