Schaller M6 135 Guitar Tuning Machine
The Schaller M6 135 sets a high benchmark for closed guitar tuning machines, continuing a legacy that originally defined modern enclosed tuners in 1966. Featuring a refined 1:18 gear ratio, this model delivers silky smooth operation, velvety tactile response, and precise micro-tuning stability. High-precision CNC machining across all structural components ensures consistent self-locking engagement without mechanical backlash.
Engineered for enduring durability, the internal string posts are precision-machined from solid brass and seated directly into the housing to eliminate wear and ensure optimal pitch retention. The stepped M6 collar washer reliably centers the tuner post within the peghead hole, preventing string shaft deflection and relieving lateral stress from the rear mounting screws without requiring stepped headstock drilling.
Permanently lubricated with specialized Schaller tuning grease, these sealed machines remain completely maintenance-free across their operational lifetime. Because the M6 135 shares the exact mounting dimensions of its predecessor, it serves as a seamless drop-in replacement on compatible headstocks without necessitating woodwork or modification.
| Brand | Schaller |
| Model | M6 135 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| String Post Material | Brass |
| Housing Construction | Enclosed CNC-machined |
| Lubrication | Sealed Schaller specialty grease (maintenance-free) |
| 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 | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Overall Product Weight | 0.79 lb |
