Quote:
Originally Posted by butz999
I don't know which adapters you are talking about but three weeks ago I recieved a new set of Vintage wheels and adapters from Bob at Vintage everything bolted up perfectly although some pins with external hex heads would be nice, after reading about the problems about concentricity and taper I looked at mine, first I checked the taper, I put machinest blue dye on the pins and tightned them down,I had full contact (the taper appeared to be the same pin and hole) then I set up a dial indicator on a machined surface of the hub the most out of concentricity i could find is appx. .004-.006 all said I don't know about other wheel manufactures but the Vintage wheels were spot on, however the pins could be improved. When it is all worked out I will be in line for improved pins.
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I would not call 0.004-0.006 of an inch "spot on." Especially if we are talking about a hub. We hold our hub concentricity to under 0.001 inches. Modern automotive manufacturers hold concentricity in the microns on hubs.
Additionally, it is critical WHERE you take the measurement. If you took the measurement out at the OUTBOARD end of the hub (out at then end of the threads), it will not be the same next to the inboard side of the hub. Remember, a wobble of 0.006" at the inboard side of the hub could translate to substantially more out at the end of the hub--which may translate to who-knows-what out at the WHEEL. (Think of the distances involved.) Now think of the run-out of the rim and the run-out of the tire and add the whole mess together and your heart starts to pulse unevenly...not to mention the brakes too.
David
