Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 tuning machine features an advanced 1:18 gear ratio that delivers exceptional tuning precision and velvety-smooth operation. Designed as the modern evolution of the legendary original closed tuner, it incorporates precision CNC-machined components, high-grade brass string posts, and Schaller special grease lubrication for maintenance-free durability.
Equipped with an innovative stepped flanged washer, this machine head centers the post securely through the banjo bolt without requiring a stepped headstock bore. This functional advancement eliminates tilt moment and relieves operational strain on both the string post and rear mounting screws.
Featuring the identical installation dimensions of its predecessor, the M6 90 allows for seamless direct replacement on guitar headstocks. It offers self-locking drive mechanics and rock-solid string stability for demanding performance environments.
| Brand | Schaller |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | High-Grade Brass |
| Button Bore Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Product Weight | 0.13 lb |
| Weight per Single Tuner with Button (Small/Large) | 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 threaded bushing |
| Lubrication | Schaller Special Grease Lubricated (Maintenance-Free) |
