Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 Guitar Tuning Machine represents precision engineering and refined performance, setting a benchmark for closed tuning machines. Engineered with an upgraded 1:18 gear ratio, it delivers ultra-smooth operation, highly delicate adjustment capabilities, and superior tuning stability.
Every component is high-precision CNC-machined and surface-treated, featuring a self-locking drive and premium brass string posts that fit snugly into the housing for wear-free durability. Sealed construction with permanent Schaller lubrication ensures completely maintenance-free functionality over its lifetime.
Designed with an innovative stepped M6 flanged washer, this tuner allows effortless installation and permanent axle centering without requiring a stepped headstock bore. The configuration eliminates tilting torque and reduces structural strain on mounting hardware while matching the original M6 footprint for seamless replacement.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Weight per Unit 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) |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight | 0.13 lb |
| Lubrication | Permanent Special Grease Lubrication (Maintenance-Free) |
