Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 series guitar tuning machine sets an industry benchmark for closed tuners, featuring an upgraded 1:18 gear ratio for exceptionally smooth and precise tuning control. Every component is CNC-machined to precise tolerances and surface-finished to deliver dependable performance and long-lasting stability.
Equipped with high-grade brass string posts engineered for wear-free durability, each enclosed unit is permanently lubricated with Schaller special grease for completely maintenance-free operation. The self-locking drive mechanism guarantees uniform tuning sensitivity and solid pitch retention.
Featuring the innovative stepped M6 collar washer with an integrated centering step, this tuning machine simplifies installation by eliminating headstock step drilling and reducing lateral shaft tension. Sharing identical installation dimensions with its predecessor, it serves as a direct drop-in replacement.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Shaft Material | Brass |
| Button Bore Hole Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Individual Weight with Button (Small/Large) | Metal: 1.27 oz / 1.34 oz (36 g / 38 g); Perloid/Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) |
| Total Weight | 0.79 lb (0.36 kg) |
| Lubrication | Permanently lubricated with Schaller special grease |
