Schaller M6 135 Guitar Tuning Machine
The Schaller M6 135 guitar tuning machine sets an industry standard for precision, durability, and tuning stability. Engineered with an upgraded 1:18 gear ratio, this closed-construction tuner delivers smooth, highly sensitive, and reliable operation. High-precision CNC-machined components and self-locking drive mechanics ensure velvety-smooth action with zero maintenance thanks to permanent lubrication with Schaller special grease.
Crafted with premium brass string posts precision-fitted into the housing, the M6 135 guarantees optimal wear resistance and stable pitch. The innovative stepped M6 flanged collar with a 0.39-inch (10 mm) base reliably centers the string post through the banjo bolt, preventing tipping torque and eliminating the need for a stepped headstock hole while relieving mechanical stress on mounting screws.
Sharing identical installation dimensions with its classic predecessor, the M6 135 offers drop-in replacement functionality without requiring guitar modifications. Included mounting hardware ensures seamless integration across various standard electric and acoustic headstock configurations.
| Brand | Schaller |
| Model | M6 135 |
| Gear Ratio | 1:18 |
| String Post Material | High-Grade Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Button Borehole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| 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) |
| Included Banjo Bolts | 6 |
| Included Flanged Washers | 6 |
| Included Mounting Screws | 6 x M2.2 x 0.37 in (9.5 mm) |
