Schaller M6 90 Guitar Tuning Machine

The Schaller M6 90 guitar tuning machine represents high-precision engineering with an enhanced 1:18 gear ratio for ultra-smooth and accurate tuning. CNC-machined components and premium brass posts ensure maximum tuning stability, wear resistance, and long-lasting performance.
Featuring the innovative stepped M6 washer, this tuner simplifies installation while securely centering the string post to eliminate tilting moment and reduce strain on mounting screws. Each enclosed machine head comes permanently lubricated with proprietary grease for completely maintenance-free operation.
Designed with standard mounting dimensions identical to its predecessor, the M6 90 offers seamless retrofitting and upgrade compatibility for solid and slotted guitar headstocks.
Brand
Schaller
Model
M6 90
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Weight
0.8 lb
Single Unit Weight with Button
Metal: 1.3 oz / 1.3 oz, Perloid: 1.1 oz / 1.1 oz, Ebony: 1.1 oz / 1.1 oz (including hollow screw)
Button Bore Hole
0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) driving surface
Post Material
Brass
Lubrication
Permanent lubricant grease