Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 closed guitar tuning machine delivers outstanding precision and comfort with an upgraded 1:18 gear ratio. Designed to preserve the legendary heritage of the original 1966 M6 while integrating modern refinements, it provides smooth, velvety tuning and exceptional pitch stability.
Every component is CNC-machined to exact tolerances and surface-finished for durable performance. The high-grade brass string posts are fitted precisely into the housing, supported by a self-locking drive and lifetime lubrication with specialized grease for completely maintenance-free operation.
Featuring the innovative stepped flanged washer, the M6 90 centers the string post reliably through the banjo bolt without requiring stepped peghead drilling. This design eliminates tilting torque and distributes pressure away from both the post and the rear mounting screw for trouble-free installation.
| Brand | Schaller |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String 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 | 0.13 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
