Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets a global benchmark for enclosed guitar tuning machines, featuring a precise 1:18 gear ratio that ensures velvet-smooth and accurate tuning. Each component is CNC-machined and surface-treated to guarantee consistent, self-locking performance and lasting durability.
Equipped with high-grade brass string posts engineered directly into the housing, these tuners deliver exceptional tuning stability and zero wear. The innovative stepped M6 flanged washer reliably centers the string post through the banjo bolt, eliminating tilt and removing direct pressure from both the post and rear mounting screws.
Designed with identical mounting dimensions to its classic predecessor, the M6 90 offers seamless installation without requiring modifications to your guitar headstock. High-grade Schaller special grease provides permanent internal lubrication for completely maintenance-free operation.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Product Weight | 0.13 lb |
| Button Bore Hole Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight per Single Tuner with Button | Metal: 1.27 oz / 1.34 oz (36 g / 38 g), Perloid: 1.06 oz / 1.09 oz (30 g / 31 g), Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) including banjo bolt |
| String Post Material | Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
