Schaller M6 135 Guitar Tuning Machine
The Schaller M6 135 guitar tuning machine sets an industry standard for closed tuning machines, combining timeless design with modern engineering. Featuring a refined 1:18 gear ratio, it delivers ultra-precise, velvety-smooth tuning response and exceptional tuning stability. All parts are CNC-machined with high precision, surface-finished, and permanently lubricated with Schaller special grease for maintenance-free operation.
Engineered for premium performance and durability, the string posts are crafted from high-grade brass and fitted precisely into the housing to eliminate wear and backlash. The innovative stepped M6 flanged washer with a 0.39-inch diameter ensures solid post centering via the banjo bolt, removing tilting torque and stress from the mounting screw without requiring stepped headstock drilling.
With identical mounting dimensions to its predecessor, the M6 135 offers a direct, hassle-free replacement on existing instruments without requiring headstock modifications. It provides a robust, self-locking mechanism that guarantees long-lasting tuning accuracy across standard and locking setups.
| Brand | Schaller |
| Model | M6 135 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.13 lb |
| Weight per Single Unit 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 |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Included Mounting Screws | M2.2 x 9.5 mm |
| Post Material | High-Grade Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
