Schaller M6 135 Guitar Tuning Machine
The Schaller M6 135 guitar tuning machine sets an industry benchmark with its advanced 1:18 gear ratio, delivering unmatched precision and ultra-smooth tuning performance. Every component is CNC-machined and finished with high accuracy, utilizing a self-locking drive mechanism to maintain exceptional stability and responsiveness.
Featuring high-grade brass string posts precisely fitted into the housing, this tuning machine provides maximum tuning stability and wear-free operation. The innovative stepped M6 flanged washer reliably centers the string post through the threaded bushing without requiring a stepped headstock bore, effectively eliminating tilting torque and reducing stress on the rear mounting screw.
Permanently lubricated with Schaller special grease for maintenance-free longevity, the M6 135 matches the exact installation dimensions of its predecessor for seamless, direct-replacement installation on solid and slotted headstocks.
| Brand | Schaller |
| Model | M6 135 |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat |
| Weight per Single Tuner 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) |
| Product Weight | 0.79 lb |
| Lubrication | Schaller Special Grease (Maintenance-Free) |




















