Schaller M6 135 Guitar Tuning Machine
The Schaller M6 135 guitar tuning machine delivers state-of-the-art tuning accuracy and smooth operation, building upon the iconic closed-housing design first introduced in 1966. Featuring a refined 1:18 gear ratio, this machine head provides precise micro-tuning and exceptional pitch stability. High-precision CNC machining and premium brass string posts ensure wear-free, long-lasting performance.
Designed with the innovative stepped M6 flanged washer, this tuning machine simplifies installation by reliably centering the string post without the need for a stepped headstock hole. This mechanism eliminates tilt torque and relieves mechanical stress from both the post and the rear mounting screw. Every unit is permanently lubricated with Schaller special grease for completely maintenance-free functionality.
Sharing the exact installation dimensions of its classic predecessor, the M6 135 serves as a direct, modification-free drop-in replacement. Whether selected in standard, Locking, or TopLocking configurations, it delivers robust string retention and flawless mechanical action suitable for both solid and slotted headstock instruments.
| Brand | Schaller |
| Model | M6 135 |
| Gear Ratio | 1:18 |
| Product Weight | 0.13 lb |
| Button Bore Hole | Diameter 0.17 in with 0.14 in drive flat |
| Weight with Metal Button (Small/Large) | 1.27 oz / 1.34 oz (including banjo bolt) |
| Weight with Perloid Button (Small/Large) | 1.06 oz / 1.09 oz (including banjo bolt) |
| Weight with Ebony Button (Small/Large) | 1.06 oz / 1.09 oz (including banjo bolt) |
| String Post Material | Brass |
| Lubrication | Permanently lubricated with Schaller special grease |
