Schaller M6 90 Tuning Machine
The Schaller M6 90 tuning machine delivers exceptional tuning accuracy and smooth operation with its refined 1:18 gear ratio. Designed to build on the legacy of the original closed-housing tuner introduced in 1966, this modern iteration incorporates high-precision CNC-machined components and premium brass string posts for maximum tuning stability and wear resistance.
Featuring the innovative stepped M6 flanged washer, this tuning machine simplifies installation by reliably centering the string post within standard 0.39-inch (10 mm) peghead holes. This smart design eliminates tilting moments and relieves mechanical stress from both the post and the rear mounting screw, preventing the need for stepped headstock drilling.
Equipped with permanent internal lubrication using Schaller special grease, the sealed housing guarantees maintenance-free performance throughout its lifespan. It shares identical mounting dimensions with classic predecessor models, allowing for direct replacement and seamless upgrades on compatible guitar headstocks.
| Brand | Schaller |
| SKU | 10050570.04.55 |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Weight | 0.13 lb |
| Post Material | Brass |
| Housing Type | Sealed / Closed |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat |
| Individual Unit Weight 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) |
