Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers renowned tuning precision and stability, building upon an iconic closed-gear design first established in 1966. Featuring an enhanced 1:18 gear ratio, it ensures smooth, accurate adjustment while retaining the classic characteristics of the M6 series.
Crafted with precision CNC machining and high-grade brass string posts, each tuner provides exceptional wear resistance and long-lasting stability. The self-locking drive mechanism delivers consistent performance, supported by permanent lubrication with specialized Schaller grease for entirely maintenance-free operation.
Equipped with an innovative stepped M6 flanged washer with a 0.39-inch diameter, this tuning machine reliably centers the string post without requiring a stepped peghead bore. It maintains identical installation dimensions to predecessor models, enabling direct, modification-free retrofitting.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Weight | 0.79 lb |
| Post Material | Brass |
| 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 (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 |
| Stepped Washer Diameter | 0.39 in (10 mm) |
| Mounting Screws | M2.2 x 9.5 mm (0.37 in) |
| Lubrication | Schaller Special Grease (Permanent) |
