Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers refined performance and exceptional tuning stability. Built with high-precision CNC-machined components and high-grade brass string posts, this enclosed tuner features an upgraded 1:18 gear ratio for smooth, sensitive, and accurate adjustments. Every unit is permanently lubricated with proprietary Schaller grease for lifelong, maintenance-free operation.
Installation is streamlined thanks to the innovative stepped M6 flanged washer, which centers the post via the banjo bolt and eliminates the need for stepped headstock drilling. This design eliminates tilt torque while taking mechanical stress off both the post and the rear mounting screw. With identical mounting dimensions to previous generations, upgrading existing instruments is direct and hassle-free.
Engineered for maximum versatility and structural integrity, the M6 series self-locking drive ensures consistent resistance and backlash-free operation. Whether outfitting a slotted or solid headstock configuration, these tuning machines provide professional-grade reliability and seamless functionality for demanding players.
| Brand | Schaller |
| Series | M6 Series |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Product Weight | 0.8 lb |
| Post Material | High-Grade Brass |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving flat 0.14 in (3.6 mm) |
| Weight per Single Tuner with Button (Small/Large) | Metal: 1.27 oz / 1.34 oz (36 g / 38 g), Perloid: 1.06 oz / 1.09 oz (30 g / 31 g), Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) including banjo bolt |
| Lubrication | Permanently lubricated with Schaller special grease |
| Mounting Washer | Stepped flanged washer (0.39 in / 10 mm diameter) |
