Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 sets a benchmark for closed tuning machines, offering flawless functionality and a refined 1:18 gear ratio for exceptionally smooth and precise tuning. Every component is CNC-machined with high precision and permanently lubricated with Schaller special grease for entirely maintenance-free performance.
Crafted with premium brass posts fitted directly into the housing, these machine heads ensure maximum tuning stability and wear resistance. The self-locking drive delivers uniform, sensitive adjustments that keep your guitar securely in tune during demanding play.
An innovative stepped M6 flanged washer centers the string post reliably through the banjo bolt, eliminating tilt moments and removing pressure from the mounting screws. With identical installation dimensions to its predecessor, it serves as a seamless replacement upgrade without requiring headstock modifications.
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Weight | 0.79 lb |
| Button Bore Hole | Diameter 0.17 in with driving surface 0.14 in |
| Single Tuner Weight 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 banjo bolt |
| Mounting Screws Included | M2, 2 x 9.5 mm |
| Lubrication | Permanent Schaller special grease (maintenance-free) |
