Schaller M6 135 Guitar Tuning Machine
The Schaller M6 135 guitar tuning machine sets an industry benchmark for closed-type tuning assemblies, featuring an upgraded 1:18 gear ratio for velvety smooth, high-precision instrument tuning. Every internal and external component is CNC-machined to exacting tolerances and surface-finished, utilizing a self-locking drive mechanism to deliver exceptional tuning stability and sensitive adjustments without backlash.
Equipped with high-grade brass string posts engineered specifically for wear-free operation, these tuners fit seamlessly into the housing to ensure peak structural integrity. The innovative stepped M6 flanged washer centers the post securely via the hollow bolt (banjo bolt), eliminating tilting torque and removing lateral pressure from both the post and rear mounting screw without requiring stepped drilling into the guitar headstock.
Designed with identical installation dimensions to its predecessor, the M6 135 allows direct replacement and retrofit on electric and acoustic guitars without woodwork modifications. Sealed permanently with specialized lubricating grease, these tuners remain fully maintenance-free throughout their operational life.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| 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 hollow bolt |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Flanged Washer Diameter | 0.39 in (10 mm) |
| Mounting Screws Included | M2.2 x 9.5 |
| Lubrication | Permanently lubricated with Schaller special grease |
| Total Weight | 0.13 lb |
