Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 tuning machine offers unmatched precision and smooth tuning comfort with an improved 1:18 gear ratio. All components are CNC-machined to exacting tolerances, surface-finished, and permanently lubricated with Schaller special grease for maintenance-free, self-locking operation.
Crafted with premium brass string posts precisely fitted into the housing, this tuning machine delivers outstanding tuning stability and wear resistance. The innovative stepped M6 flanged washer reliably centers the string post via the hollow screw, eliminating tilting moments and preventing stress on both the post and rear mounting screw without requiring stepped headstock drilling.
Designed with identical installation dimensions to its predecessor, the M6 90 serves as a direct drop-in replacement without requiring guitar modifications. It includes stepped flanged washers, hollow screws, and mounting screws for secure and straightforward installation.
| Brand | Schaller |
| Model | M6 90 |
| Product Line | M6 Series |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Button Bore Diameter | 4.2 mm with 3.6 mm driving flat |
| Weight | 0.79 lb |
| 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 |
| Mounting Screw Size | M2.2 x 9.5 mm |
| Washer Diameter | 10 mm stepped flanged washer |
