Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 sets a global benchmark for enclosed tuning machines, combining timeless design with modern engineering. Engineered with an improved 1:18 gear ratio, it provides velvety smooth turning action and exact tuning accuracy. Every component is CNC-machined to exacting tolerances and permanently lubricated with Schaller special grease for maintenance-free reliability.
Crafted with premium brass string posts, the M6 90 guarantees wear-free performance and superior tuning stability. The self-locking drive mechanism ensures sensitive adjustments while completely preventing slippage under string tension. It retains identical mounting dimensions to predecessor models, enabling effortless replacement without headstock modifications.
Featuring the innovative stepped M6 flanged washer, this tuning machine reliably centers the string post without requiring a stepped headstock bore. This functional design eliminates tilting torque and relieves mechanical stress from both the post and the rear mounting screw. Built for durability and refined performance, it is an essential upgrade for any solid or slotted headstock.
Product Number
10050571.02.35
Brand
Schaller
Model
M6 90
Gear Ratio
1:18
Post Material
High-Grade Brass
Lubrication
Permanent Special Grease (Maintenance-Free)
Button Bore Hole
Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) driving surface
Single Tuner Weight with Button (Small / Large)
Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz)
Product Weight
0.79 lb