Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets the standard for closed guitar tuning machines with an advanced 1:18 gear ratio for velvety smooth, precise tuning control. All components are CNC-machined to exacting tolerances, surface-treated, and permanently lubricated with specialized grease for completely maintenance-free operation and exceptional durability.
Equipped with high-grade brass posts fitted seamlessly into the housing, the M6 90 ensures outstanding tuning stability and wear resistance. The self-locking drive maintains steady tension, eliminating slipping under demanding performance conditions.
Featuring the innovative stepped M6 flanged collar, this tuning machine mounts cleanly while securely centering the string post to eliminate tilting forces on the headstock. It shares the identical installation footprint of its predecessor, allowing direct replacement without headstock modifications.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | 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), Pearloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including hollow screw |
| Product Weight | 0.79 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
