Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 tuning machine features a 1:18 gear ratio that provides precise and smooth tuning control. Built on the iconic enclosed design introduced in 1966, this modernized version incorporates precision CNC-machined components and self-locking drive technology for stable, wear-free performance.
Equipped with high-grade brass string posts engineered for an exact housing fit, each unit maintains superior tuning stability. The specialized stepped M6 flanged washer ensures straightforward installation and center alignment of the string post, eliminating tilt moment and protecting the mounting hardware without requiring step-drilled headstock holes.
Permanently lubricated with Schaller special grease for completely maintenance-free operation, the M6 90 maintains the identical installation dimensions of previous models for hassle-free replacement on compatible guitar headstocks.
| Gear Ratio | 1:18 |
| Weight with Button per Single Tuner (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 | Diameter 0.17 in (4.2 mm) with driving flat 0.14 in (3.6 mm) |
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Model | M6 90 |
| String Post Material | High-grade Brass |
| Housing Type | Enclosed |
| Lubrication | Permanently lubricated with Schaller special grease |
