Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers exceptional tuning accuracy and comfort with its refined 1:18 gear ratio. Continuing the legacy of the original closed tuning machine established in 1966, this modern version features precision CNC-machined brass string posts and components designed for effortless, velvety smooth adjustments and exceptional tuning stability.
Equipped with Schaller's innovative stepped flanged washer, the M6 90 eliminates the need for stepped headstock drilling while securely centering the string post via the hollow bolt. This advanced design relieves strain from the mounting screw and string post, eliminating tilt moment and ensuring seamless, wear-free performance.
Engineered with permanently lubricated internal gears using specialized Schaller grease, each machine head is entirely maintenance-free. It shares identical mounting dimensions with its predecessor, making retrofitting and upgrading effortless without requiring any headstock modifications.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String Post Material | High-Grade Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Button Bore Hole Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight | 0.79 lb |
| Weight per Single Unit (Metal Small / Large) | 1.27 oz / 1.34 oz (36 g / 38 g) |
| Weight per Single Unit (Perloid Small / Large) | 1.06 oz / 1.09 oz (30 g / 31 g) |
| Weight per Single Unit (Ebony Small / Large) | 1.06 oz / 1.09 oz (30 g / 31 g) |
