Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine features a refined 1:18 gear ratio that delivers exceptional tuning accuracy, velvet-smooth turning response, and dependable pitch stability. All components are CNC-machined to precise tolerances, finished to high standards, and permanently lubricated with Schaller special grease for completely maintenance-free operation.
Equipped with high-grade brass string posts engineered for wear-free durability, the M6 90 ensures solid string positioning and maximum performance. The self-locking internal drive mechanism provides consistent, sensitive adjustment across all playing conditions.
An innovative stepped M6 flanged collar centers the string post securely through the hollow screw, preventing tilt without requiring step-drilled headstock holes. Designed with identical mounting dimensions to its classic predecessor, it allows effortless drop-in replacement on compatible guitar headstocks.
| Brand | Schaller |
| Series | M6 Series |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Weight | 0.8 lb |
| Single Unit Weight with Button | 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) |
| Collar Diameter | 0.39 in (10 mm) |
| Mounting Screws | M2.2 x 0.37 in (9.5 mm) |
| Lubrication | Permanently lubricated with Schaller special grease |
