Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine delivers exceptional tuning precision and smooth operation with an improved 1:18 gear ratio. CNC-machined components with premium surface finishing and a self-locking drive ensure velvet-smooth adjustment, enhanced sensitivity, and outstanding tuning stability.
Crafted with high-grade brass string posts precisely fitted into the housing, these enclosed tuners provide wear-free performance. They come permanently lubricated with Schaller special grease, making them completely maintenance-free over their entire lifespan.
Featuring the innovative stepped M6 flanged washer, these tuners ensure reliable string post centering via the banjo bolt without requiring stepped headstock drilling. This design eliminates tilting torque and reduces mechanical strain on both the post and rear mounting screws.
Brand
Schaller
Model
M6 90
Gear Ratio
1:18
Weight per Unit 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
Button Bore Hole
0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat
Post Material
Brass
Lubrication
Schaller Special Grease (Maintenance-Free)
Total Weight
0.79 lb