Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets a high standard for closed guitar tuning machines, featuring a precise 1:18 gear ratio that provides velvety-smooth action and exceptional tuning comfort. Engineered with CNC-machined components and surface finishes, the self-locking drive delivers sensitive, uniform, and reliable pitch stability.
Crafted with premium brass string posts fitted tightly into the housing, each unit resists wear and maximizes performance longevity. The innovative stepped M6 flanged washer reliably centers the string post via the banjo bolt, eliminating tilt torque and protecting against excessive lateral pressure on the peghead.
Factory-lubricated with Schaller special grease for maintenance-free operation, these tuning machines retain the identical mounting dimensions of their predecessor models. This ensures a seamless retrofit and upgrade for solid or slotted headstock instruments without demanding headstock modifications.
| Gear Ratio | 1:18 |
| Weight per Machine with Button | Metal: 1.27 oz / 1.34 oz; Pearloid: 1.06 oz / 1.09 oz; Ebony: 1.06 oz / 1.09 oz |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving flat 0.14 in (3.6 mm) |
| Brand | Schaller |
| Model | M6 90 |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| String Post Material | Brass |
| Housing Type | Closed / Sealed |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Flanged Washer | Stepped 0.39 in (10 mm) Diameter |
| Product Weight | 0.79 lb |
