Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents precision engineering with a refined 1:18 gear ratio for smooth, velvety, and exact tuning. Built upon the legacy of the original 1966 design, this model incorporates precision CNC-machined components and high-grade brass posts fitted into the housing for maximum tuning stability and wear resistance.
Featuring the innovative stepped M6 flanged washer, this tuning machine ensures straightforward installation and lasting center alignment without requiring stepped headstock drilling. This design eliminates tilting torque and reduces mechanical stress on both the string post and rear mounting screw, while self-locking internal gearing and permanent lubrication guarantee maintenance-free reliability.
Engineered with identical mounting dimensions to its predecessor, the M6 90 offers seamless drop-in replacement on standard headstocks. Each unit is crafted for superior performance, delivering exceptional tuning comfort and durability across a wide range of instrument setups.
| Brand | Schaller |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Washer Type | Stepped M6 Flanged Washer (0.39 in / 10 mm diameter) |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat |
| 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) |
| Total Weight | 0.79 lb |
| Lubrication | Permanent Special Grease |
