Not Ranked
Yeah, aluminum is a poor bearing surface and aluminum on aluminum is very prone to galling. My understanding (from talking with a tool & diemaker with 60+ years' experience) is that any metal will gall when bearing against a piece of the same metal, some worse than others. Apparently, the way to avoid galling is to use adequate lubrication (anti-sieze); the way to prevent it is to make both pieces from dissimilar metals. Stainless spinners sound like a good idea: Does anyone know of a source for SS spinners for SPF cars? For aluminum spinners on aluminum wheels, it's probably a good idea to take 'em off, lube 'em up and replace 'em several times a year.
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