Schaller M6 135 Guitar Tuning Machine

The Schaller M6 135 guitar tuning machine sets a benchmark for closed tuners, combining precision CNC machining with an upgraded 1:18 gear ratio for smooth, accurate tuning. Designed to match the exact mounting dimensions of its historic predecessor, it offers effortless direct replacement without requiring instrument modifications.
Engineered for maximum tuning stability, each unit features precision-fitted solid brass string posts and high-grade surface finishes. The self-locking drive mechanism delivers consistent, sensitive adjustments, while lifetime lubrication with Schaller special grease ensures completely maintenance-free operation.
Installation is streamlined by the innovative stepped M6 flanged washer, which reliably centers the string post without requiring a stepped headstock bore. This design eliminates tilting torque and reduces mechanical strain on both the string post and rear mounting screw for enhanced durability.
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)
Weight with Button per Tuner (Small/Large)
Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including threaded bushing
Product Weight
0.13 lb