I recently machined an aluminum crankshaft pulley for a 390 ford engine. It uses the stock V belts, which are .430 wide. This aluminum was 6061 and came T6 heat treated. There is no surface treatment, such as anodizing. I have never seen aluminum V belt pulleys on OEM applications, so it makes me wonder whether it is a cost issue or a service life issue. I have seen aftermarket aluminum pulleys from March. Does anyone out there know what kind of life I can expect from a pulley like this?|||I don't know either. I usually change a cast iron pulley after 4 v-belt changes. Alumunium pulley might be last for 3 v-belts, I guess?|||I'd think it would last forever since it's harder than the fan belt.|||it may out live you,then again it may not. who can say|||depends on conditions.
hard coat anodizing would certainly make it last longer.
what will happen is the oxide will get rubbed off over time.. I dont know how fast
also it depends upon how thick you made it. you may just end up with the sloped sides worn down.
wer
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