Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision German engineering, featuring a refined 1:18 gear ratio that ensures velvet-smooth and exact tuning. Building on the legendary sealed design introduced in 1966, this upgraded model delivers exceptional tuning stability with self-locking brass drive mechanisms housed in CNC-machined components.
Equipped with an innovative stepped M6 flanged washer, this tuning machine simplifies installation by automatically centering the string post via the banjo bolt. This eliminates the need for stepped headstock drilling while removing tilting torque and relieving pressure from both the post and rear mounting screws.
Each closed-system tuner is permanently lubricated with proprietary Schaller special grease for completely maintenance-free operation. Maintaining standard mounting dimensions, the M6 90 serves as a direct drop-in replacement for previous models without requiring modifications to the headstock.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Series | M6 Series |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive surface |
| Weight per Single Tuner | Metal: 1.27 oz / 1.34 oz (36 g / 38 g), Perloid/Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) |
| Product Weight | 0.79 lb |
| Lubrication | Permanently lubricated with Schaller special grease |
