Schaller M6 135 Guitar Tuning Machine
The Schaller M6 135 guitar tuning machine delivers outstanding precision and tuning comfort with an advanced 1:18 gear ratio. Continuing the legacy of the original 1966 closed tuner design, this upgraded model features high-precision CNC-machined components and high-grade brass string posts engineered for wear-free durability and maximum tuning stability.
Equipped with an innovative stepped M6 flanged washer, it centers the string post securely through the banjo bolt without requiring a stepped headstock bore. This specialized design eliminates tilting torque and relieves mechanical stress from both the post and the rear mounting screw.
Permanently lubricated with Schaller special grease, these sealed tuners remain entirely maintenance-free over their lifespan. They share identical installation dimensions with previous generations, allowing seamless drop-in replacement on compatible guitars.
| Brand | Schaller |
| Model | M6 135 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight | 0.79 lb |
| 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) including banjo bolt |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with drive flat 0.14 in (3.6 mm) |
| Post Material | High-Grade Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Mounting Screw Size | M2.2 x 9.5 |
