Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding precision and comfort with an advanced 1:18 gear ratio. Designed with CNC-machined components and high-grade brass string posts, it ensures velvety-smooth operation, exceptional tuning stability, and wear-free durability.
Featuring the innovative stepped M6 flanged washer, this tuning machine simplifies installation by reliably centering the string post without requiring a stepped headstock bore. It eliminates tilt moments and removes stress from both the post and rear mounting screw.
Each enclosed unit is permanently lubricated with Schaller special grease for completely maintenance-free performance. Retaining the exact mounting dimensions of its predecessor, the M6 90 serves as a direct, modification-free replacement.
| Brand | Schaller |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Button Bore Hole | Diameter 0.17 in with 0.14 in drive flat |
| Post Material | Brass |
| Product Weight | 0.13 lb |
| Weight per Single Tuner with Button (Small/Large) | Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including banjo bolt |
| Lubrication | Permanently lubricated with Schaller special grease |
