Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents the pinnacle of closed tuning peg engineering, featuring an upgraded 1:18 gear ratio for velvety smooth, ultra-precise tuning. Every component is CNC-machined to exacting tolerances and treated with a premium surface finish to guarantee lifelong wear resistance and rock-solid pitch stability.
Equipped with high-grade brass string posts and permanently lubricated with Schaller special grease, these maintenance-free tuning machines deliver effortless performance. The innovative stepped M6 flanged collar reliably centers the string post without requiring stepped headstock drilling, removing mechanical tilt and relieving pressure from the rear mounting screw.
Designed with identical mounting dimensions to its classic predecessor, the M6 90 allows for seamless direct-replacement installation on compatible guitars without body modifications. Available in a wide selection of configurations, finishes, button materials, and post types, it offers unparalleled versatility for custom builds and upgrades.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| 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 driving surface 0.14 in (3.6 mm) |
| Collar Diameter | 0.39 in (10 mm) |
| Mounting Screw Size | M2, 2 x 0.37 in (9.5 mm) |
| Post Material | Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
