Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine represents high-precision engineering with an advanced 1:18 gear ratio, delivering velvet-smooth operation and exceptional tuning accuracy. Built with CNC-machined components and high-grade brass posts, these enclosed tuners provide rock-solid pitch stability and wear-free performance for both electric and acoustic guitars.
Featuring the innovative stepped M6 flanged collar with a 0.39 in (10 mm) base, the string post centers securely without requiring stepped headstock drilling. This smart design removes mechanical tilt moments and eliminates stress on both the peg and the rear mounting screws, ensuring optimal alignment and structural longevity.
Permanently lubricated with specialized Schaller grease for maintenance-free reliability, each unit matches the mounting dimensions of predecessor models for seamless drop-in installation. Included mounting hardware ensures straightforward retrofitting with factory-level precision and refined aesthetics.
Gear Ratio
1:18
Weight per Single Tuner with Button (Small/Large)
Metal (0.08 lb / 0.08 lb), Perloid (0.07 lb / 0.07 lb), Ebony (0.07 lb / 0.07 lb) including banjo bolt
Button Bore Hole
Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) driving surface
Product Weight
0.79 lb
Brand
Schaller
Product Line
M6 Series
Post Material
Brass
Construction
Closed / Sealed Housing
Lubrication
Schaller Special Grease (Maintenance-Free)