Schaller M6 135 Guitar Tuning Machine
The Schaller M6 135 guitar tuning machine sets an industry benchmark for closed-type tuners, combining precision German engineering with a refined 1:18 gear ratio for smooth, accurate tuning stability. Featuring CNC-machined components and high-grade brass string posts fitted precisely into the housing, it ensures sensitive adjustments and long-lasting, wear-free performance.
Equipped with an innovative stepped M6 flanged washer with a 0.39 in diameter, this tuner reliably centers the string post via the banjo bolt and eliminates tilting moments without requiring a counterbore in the headstock. All closed tuners are permanently lubricated with Schaller special grease, making them completely maintenance-free over extended playing sessions.
Designed with identical installation dimensions to its predecessor, the M6 135 allows direct replacement without instrument modifications. Each tuning machine includes mounting hardware and robust brass posts to deliver optimal structural rigidity and outstanding tuning retention.
| Brand | Schaller |
| Model | M6 135 |
| Gear Ratio | 1:18 |
| Product Weight | 0.79 lb |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| 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 |
| Post Material | Brass |
| Lubrication | Schaller special permanent grease |
| Mounting Screws Included | M2.2 x 0.37 in (M2.2 x 9.5 mm) |
