Schaller M6 135 Guitar Tuning Machine
The Schaller M6 135 guitar tuning machine sets a benchmark for closed-gear tuners, featuring an upgraded 1:18 gear ratio for exceptionally precise, velvety smooth, and reliable tuning stability. Every internal component is CNC-machined and finished with precision, while the brass string posts fit snugly into the housing to ensure durable, wear-free performance.
Equipped with an innovative stepped flanged washer with a 0.39-inch diameter base, this tuning machine simplifies installation by reliably centering the string post via the banjo bolt and eliminating the need for a stepped headstock hole. This design absorbs rotational torque and reduces pressure on both the string post and rear mounting screw.
Featuring the exact same installation dimensions as its legacy predecessor for direct drop-in replacement, each sealed unit is permanently lubricated with Schaller special grease for entirely maintenance-free operation across solid and slotted headstock configurations.
| Brand | Schaller |
| Model | M6 135 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Button Bore Hole Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Post Material | Brass |
| Weight | 0.79 lb |
| Weight per Single Tuner with Button (Small / Large) | Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) |
| Mounting Screw Size | M2.2 x 0.37 in (9.5 mm) |
| Lubrication | Permanent Schaller Special Grease |
