Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 represents the pinnacle of closed tuning machine engineering, delivering flawless performance with an upgraded 1:18 gear ratio. Each component is CNC-machined to exact tolerances and permanently lubricated with Schaller special grease for ultra-smooth, maintenance-free tuning stability.
Equipped with high-grade brass string posts and a self-locking drive mechanism, the M6 90 ensures maximum durability and eliminates tuning slippage. The innovative stepped M6 flanged washer centers the string post precisely within a 0.39 in (10 mm) peghead bore, removing tilt torque and reducing stress on the mounting hardware.
Retaining the identical installation dimensions of its classic predecessor, the M6 90 allows for direct drop-in replacement on electric and acoustic guitars without requiring headstock modifications. This set includes threaded hex bushings, stepped flanged washers, and mounting screws for complete installation.
| 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 threaded bushing |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Product Weight | 0.79 lb |
| Brand | Schaller |
| Series | M6 Series |
| Post Material | Brass |
| Construction | Closed Housing |
