Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 series guitar tuning machine sets a standard for closed tuning machines, combining timeless design with a 1:18 gear ratio for smooth, high-precision tuning. Each component is CNC-machined and surface-treated to deliver a self-locking drive with fine, consistent, and stable adjustment.
Crafted with premium brass posts fitted into the housing, these tuning machines provide maximum tuning stability and wear-free performance. The specialized step flanged washer centers the string post securely via the banjo bolt, eliminating tilt torque and protecting both the post and mounting screw without requiring stepped headstock drilling.
Permanently lubricated with Schaller special grease for maintenance-free operation, the M6 90 shares identical installation dimensions with its predecessor model, allowing direct retrofitting without headstock modifications.
| Brand | Schaller |
| Series | M6 Series |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Weight per Single Tuner with Button (Small/Large) | Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including banjo bolt |
| Button Bore Hole | 0.17 in diameter with 0.14 in drive flat |
| Product Weight | 0.79 lb |
