Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine delivers state-of-the-art precision and reliability with an improved 1:18 gear ratio for smooth, accurate tuning. Designed to replace its predecessor without any instrument modifications, it retains identical installation dimensions while incorporating advanced mechanical innovations.
Each component is CNC-machined to exact tolerances and finished to ensure velvet-smooth operation and superior stability. The high-grade brass string posts fit snugly into the housing, while the self-locking drive and permanent internal lubrication provide maintenance-free performance and long-term durability.
Featuring the innovative stepped M6 flanged washer with a 0.39 in (10 mm) base, this tuner reliably centers the post through the banjo bolt without requiring a stepped headstock bore. This design eliminates tilting torque and reduces strain on both the string post and rear mounting screw.
Brand
Schaller
Product Type
Guitar Tuning Machine
Series
M6 Series
Gear Ratio
1:18
Post Material
Brass
Button Bore Hole
0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat
Single Tuner Weight 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)
Product Weight
0.79 lb
Lubrication
Maintenance-free Schaller Special Grease