On my Vespa, some play developed between the steel center part and the aluminum casing of the brake drum. The steel part can't be welded to the aluminum, and the internet does not give any advice either. Must I throw the brake drum away, or does anyone have some advice?
+1 or make an ashtray.
The way these are made is by the permanent mold process which Piaggio is an expert at. Iron or steel molds are filled with molten aluminum much like die casting except generally using gravity rather than pressure - it's usually cheaper on larger parts. The brake drum/hub has the steel brake part & splined hub inserted into the mold and the aluminum solidifies around it, contracting tightly. This is the same way your brake pins are held in your motor case.
Interesting though that it should separate, let's see pics. Any cracks?
I dunno what that wheel is, but dang dats bodgy!
Whats the overall drum look like (im not 100% sure what model its off)?
Whats the rest of the scoot look like?
I see your location, so that may explain the "repair", or not.
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