Schaller M6 135 Guitar Tuning Machine
The Schaller M6 135 guitar tuning machine offers precision engineering and smooth tuning stability with an improved 1:18 gear ratio. Designed with high-precision CNC-machined components and self-locking drive mechanisms, it delivers consistent, sensitive, and reliable string tuning for electric and acoustic guitars.
Equipped with high-grade brass posts engineered for wear-free operation, this closed machine head features the innovative stepped M6 flanged washer. The 0.39-inch diameter stepped washer centers the string post securely through the threaded bushing without requiring step-drilling into the headstock, effectively eliminating tilt and relieving stress from mounting screws.
Permanently lubricated with Schaller special grease for maintenance-free performance, the M6 135 retains the exact mounting dimensions of its classic predecessor for straightforward direct-replacement installation.
| Brand | Schaller |
| Model | M6 135 |
| Product Type | Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| Flanged Washer Diameter | 0.39 in (10 mm) |
| Mounting Screw Size | M2.2 x 9.5 |
| Lubrication | Schaller Special Grease (Maintenance-Free) |
| Weight | 0.13 lb |
