Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents precision and performance in closed tuning machine engineering. Featuring an improved 1:18 gear ratio, it ensures precise and velvet-smooth tuning responsiveness while maintaining optimal tuning stability.
Every component is CNC-machined to exact tolerances and surface-finished to ensure uniform, sensitive, and wear-free operation. The high-grade brass string posts fit seamlessly into the housing, permanently lubricated with Schaller special grease for entirely maintenance-free longevity.
Designed with the innovative stepped M6 flanged washer, this tuner eliminates tilting torque and centers the post effortlessly without requiring stepped headstock drilling. It shares identical mounting dimensions with its predecessor model for direct, seamless replacement.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Weight | 0.79 lb |
| Single Tuner Weight with Button (Small/Large) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including hollow screw |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with drive flat 0.14 in (3.6 mm) |
| Flanged Washer Diameter | 0.39 in (10 mm) |
| Mounting Screw Dimensions | M2.2 x 9.5 mm |
| Material | Brass Posts, CNC-Machined Housing |
| Lubrication | Permanent Schaller Special Grease |
