Woodruff key -PIAGGIO DIN 6888- 3x3mm (used for primary gear Vespa V50, V90, SS50, SS90, PV125, ET3, PK S, PK XL), (used for crankshaft/flywheel side Lambretta D 125-150 (1956-1957), LD 125-150 (1956-1957))

The original Piaggio disc springs (half-moon wedges) are characterized by a production deviating from the DIN standard. The disc springs have considerably larger radii and thus make installation much easier: A Woodruff key is not designed to transmit driving forces. The frictional connection between the two components is created by the tightening torque and a cone.

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