Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 represents precision engineering and refined performance in closed guitar tuning machines. Featuring an optimized 1:18 gear ratio, it provides exceptionally smooth, accurate tuning response and dependable stability. Built with CNC-machined components, self-locking drive mechanisms, and high-grade brass posts, each unit is permanently lubricated with specialized grease for completely maintenance-free operation.
Equipped with an innovative stepped flanged washer, the M6 90 ensures solid post centering and straightforward mounting without requiring stepped peghead drilling. This design absorbs mechanical pressure, eliminating tilting torque and reducing stress on both the string post and rear mounting screws.
Engineered with identical installation dimensions to previous iterations, the M6 90 serves as a seamless, modification-free upgrade or replacement for precision-minded guitarists.
| Gear Ratio | 1:18 |
| 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) including hollow screw |
| Button Borehole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Post Material | High-grade Brass |
| Manufacturing | CNC-machined |
| Lubrication | Permanently lubricated with Schaller special grease |
| Included Hardware | 6 hollow screws, 6 stepped flanged washers, 6 mounting screws (M2.2 x 9.5 mm) |
| Weight | 0.79 lb |
