Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 sets the benchmark for closed guitar tuning machines with an advanced 1:18 gear ratio that ensures velvet-smooth, high-precision tuning. Each component is CNC-machined and surface-treated to guarantee durable, wear-free performance and exceptional pitch stability.
Equipped with premium brass string posts precision-fitted into the housing, these tuners feature a self-locking drive and lifetime lubrication with specialized grease for completely maintenance-free operation.
An innovative stepped M6 flanged washer reliably centers the string post through the banjo bolt without requiring counterbores in the headstock, effectively eliminating tilting torque and taking pressure off both the post and rear mounting screws.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Product Weight
0.8 lb
Post Material
Brass
Manufacturing Process
CNC-machined
Button Bore Hole
Diameter 0.2 in (4.2 mm) with driving surface 0.1 in (3.6 mm)
Lubrication
Permanently lubricated with Schaller special grease