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. Designed to preserve the legacy of the original 1966 closed-type machine, it incorporates modern engineering refinements for premium instrument performance.
Each component is CNC-machined to exacting tolerances, featuring brass string posts fitted precisely into the housing to ensure maximum tuning stability and wear-free operation. The internal sealed mechanism comes permanently lubricated with Schaller special grease for completely maintenance-free functionality.
Featuring the innovative stepped M6 flanged washer, this tuner eliminates tilting torque and centers the string post securely without requiring stepped peghead counterbores. It shares identical installation dimensions with predecessor models for direct, modification-free replacement.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | High-grade Brass |
| Weight | 0.13 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 banjonut) |
| Button Bore Hole | 0.17 in diameter with 0.14 in driving surface |
| Mounting Screws Included | 6 x M2, 0.08 in x 0.37 in |
| Included Washers | 6 x Stepped flanged washers (0.39 in step diameter) |
| Included Banjonuts | 6 x Banjonuts (except slotted headstock models) |
| Lubrication | Permanently lubricated with Schaller special grease |
