Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets the benchmark for enclosed guitar tuning machines with an advanced 1:18 gear ratio, delivering unmatched tuning precision, velvety-smooth action, and exceptional stability. Built with high-precision CNC-machined brass string posts and components, each unit features self-locking drive mechanics to ensure wear-free, consistent performance over years of use.
Featuring the innovative stepped M6 flanged washer with a 0.39 in (10 mm) diameter base, this tuning machine reliably centers the string post via the banjo bolt without requiring stepped peghead drilling. This design eliminates tilting moments and relieves tension from both the post and the rear mounting screw, protecting your instrument and extending tuner longevity.
All enclosed housings are permanently lubricated with Schaller special grease for completely maintenance-free operation. Engineered with the identical installation dimensions as its classic predecessor, the M6 90 allows for direct, modification-free retrofitting on standard guitar headstocks.
| Brand | Schaller |
| Model | M6 90 |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| 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 Bore Hole | 0.17 in diameter with 0.14 in drive flat |
| Product Weight | 0.13 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
