Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets an industry benchmark for enclosed guitar tuning machines, featuring a precise 1:18 gear ratio that delivers velvety-smooth and remarkably accurate tuning stability. Building on the iconic design established in 1966, this upgraded model incorporates modern engineering enhancements while retaining the classic aesthetics and reliable performance favored by musicians worldwide.
Crafted with premium CNC-machined components and high-grade brass posts, every unit ensures zero wear and dependable self-locking operation. The innovative stepped M6 flanged washer eliminates tilting torque and secures proper string post centering through the banjofit hollow screw, removing the need for stepped headstock drilling.
Permanently lubricated with Schaller special grease for completely maintenance-free longevity, the M6 90 matches the exact mounting dimensions of its predecessor for seamless retrofitting. It provides versatile configurations with outstanding durability to satisfy the rigorous demands of professional guitarists.
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| String Post Material | High-Grade Brass |
| Weight | 0.79 lb |
| Weight per Single Tuner with Button (Small/Large) | Metal (1.27 oz / 1.34 oz), Pearloid (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 flat 0.14 in (3.6 mm) |
| Flanged Washer Diameter | 0.39 in (10 mm) |
| Mounting Screw Size | M2.2 x 9.5 |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
