Quote:
Originally Posted by jsasaki
I'm not saying the VEX Pro parts are bad but just that the fit of the bearings weren't good enough for us.
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The runout of an R8 bearing is supposed to be several ten-thousandths of an inch, even for ordinary ABEC 1 or ABEC 3 bearings. Your bearings are visibly out of spec by about two orders of magnitude.
You've clearly demonstrated that those particular parts
are bad in any conventional bearing application. Since the parts came that way, I'm sure IFI will be happy to speak with you about it. Hopefully their supplier will also be willing to speak to IFI about it.
(Incidentally, the shields upon which the part number is stamped are a standard part; perhaps IFI didn't want to go to the extra expense of having a custom marking put on.)