Schaller M6 135 Guitar Tuning Machine

The Schaller M6 135 guitar tuning machine sets an industry standard for closed tuning machines, combining timeless design with modern precision. Engineered with a 1:18 gear ratio, it delivers an ultra-smooth, delicate, and stable tuning experience. Each component is CNC-machined to exact tolerances, featuring brass string posts that fit snugly into the housing for maximum tuning stability and wear resistance.
Equipped with Schaller's innovative stepped flanged washer with a 0.39-inch diameter, this tuning machine centers the string post precisely through the banjo bolt without requiring a stepped peghead bore. This design eliminates tilting moment, distributing string tension evenly and taking pressure off the mounting screws on the back of the headstock. All closed tuners are permanently lubricated with Schaller special grease, making them completely maintenance-free.
Engineered to exact legacy dimensions, the M6 135 allows direct replacement and retrofitting on existing headstocks without modifications. The self-locking drive ensures zero slippage and reliable pitch stability across heavy playing conditions. The system includes mounting hardware comprising banjo bolts, flanged washers, and M2.2 x 9.5 mm mounting screws.
Brand
Schaller
Model
M6 135
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
String Post Material
High-grade Brass
Lubrication
Schaller Special Grease (Maintenance-Free)
Button Bore Hole Diameter
0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat
Weight per Single Tuner with Button (Small / Large)
Metal: 1.27 oz / 1.34 oz (36 g / 38 g); Perloid: 1.06 oz / 1.09 oz (30 g / 31 g); Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) including banjo bolt
Product Weight
0.79 lb