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. Engineered with high-precision CNC-machined components and premium surface finishing, it ensures smooth, sensitive, and rock-solid tuning stability via a self-locking drive mechanism.
Featuring durable brass string posts perfectly fitted into the housing, this enclosed tuner guarantees wear-free performance and maximum stability. The innovative stepped M6 flanged washer centers the string post securely over the banjo bolt, eliminating tilting moment and removing pressure from both the post and rear mounting screw without requiring stepped headstock drilling.
Permanently lubricated with Schaller special grease for maintenance-free operation, the M6 90 shares the exact mounting dimensions of its predecessor for effortless drop-in replacement on compatible electric and acoustic guitars.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight per Single Tuner with Button (Small/Large) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including banjo bolt |
| Product Weight | 0.79 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
