Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers velvety smooth tuning and rock-solid stability with an upgraded 1:18 gear ratio. As the modern evolution of the legendary original enclosed tuner introduced in 1966, it features high-precision CNC-machined components with self-locking drive technology to ensure consistent, sensitive adjustments.
Built with premium brass string posts precisely fitted into durable housings, these tuning machines provide exceptional wear resistance and longevity. Sealed and permanently lubricated with proprietary Schaller special grease, each unit remains completely maintenance-free while offering optimal performance on both solid and slotted headstocks.
Installation is streamlined thanks to the innovative stepped M6 flanged washer, which centers the string post securely through the hollow bolt and eliminates tilt torque. Designed with identical mounting dimensions to its predecessor, it serves as a seamless, modification-free upgrade for standard headstocks.
| Brand | Schaller |
| Model | M6 90 |
| Series | M6 Series |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String Post Material | High-Grade Brass |
| Button Bore Hole Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Weight per Single Tuner (Small / Large Button) | 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 |
