Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers outstanding precision and smooth tuning with an improved 1:18 gear ratio. CNC-machined components and high-grade brass string posts engineered into the sealed housing ensure exceptional tuning stability, delicate adjustment, and wear-free operation.
Featuring the innovative stepped M6 flanged washer, this tuning machine simplifies installation by reliably centering the string post without requiring a stepped headstock bore. This design eliminates tilting torque and relieves mechanical stress from both the post and mounting screws.
Permanently lubricated with Schaller special grease for completely maintenance-free performance, the M6 90 maintains identical installation dimensions to its predecessor for seamless, direct-replacement upgrades on solid and slotted headstocks.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight per Single Tuner 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) |
| String Post Material | Brass |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Product Weight | 0.79 lb |
