Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets a benchmark in guitar tuning technology, offering unmatched precision and smooth operation. Engineered with an upgraded 1:18 gear ratio, this closed tuning machine delivers velvet-smooth handling and exceptional tuning stability. All components are CNC-machined to exacting tolerances, featuring brass string posts and permanently lubricated internal gears for maintenance-free reliability.
Equipped with an innovative stepped flanged washer, the M6 90 ensures effortless installation and solid post centering without requiring stepped boreholes in the headstock. This intelligent design eliminates tilting torque while relieving mechanical pressure from both the post and the rear mounting screw. Built to identical outer installation dimensions as its classic predecessor, it serves as a seamless drop-in upgrade for fine instruments.
Crafted to the highest German engineering standards, each unit pairs robust performance with refined aesthetics. The self-locking internal drive prevents slipping under high string tension, ensuring rock-solid pitch retention during intense play. Designed for versatile configurations, the M6 90 represents the pinnacle of professional guitar tuning hardware.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Post Material | High-Grade Brass |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight per Single Tuner with Button (Small / Large) | Metal: 1.27 oz / 1.34 oz (36 g / 38 g); Perloid: 1.06 oz / 1.09 oz (30 g / 31 g); Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) |
| Product Weight | 0.13 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
