Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets a benchmark in guitar tuning technology with an upgraded 1:18 gear ratio that delivers exceptional precision and smooth operation. Designed with identical mounting dimensions to its classic predecessor, it allows for direct replacement without modifying the headstock.
Precision CNC-machined components and high-grade brass string posts ensure superior tuning stability, wear resistance, and long-lasting durability. Each closed tuner is lubricated for life with specialized Schaller grease, rendering it entirely maintenance-free under normal playing conditions.
The innovative stepped M6 washer centers the string post reliably via the hollow screw and eliminates tilting torque. This design relieves mechanical pressure from both the post and the rear mounting screw, securing dependable performance across standard and locking setups.
| Brand | Schaller |
| Model | M6 90 |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| 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) |
| Product Weight | 0.79 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
