De-burr is removing casting flaws and burrs, and polishing everything to
make the surfaces smooth. Chamfering is done to the oil holes on the main
and cam bearings. It increases the diameter of the oil holes right before
it gets to the bearings to provide better lubrication. It basically puts a
bevelled edge on the oil gallery exit holes.
Mike
At 09:53 AM 2/11/2000 -0500, you wrote:
>>Unless I spelled it incorrectly...It's basically deburring the block which
>>helps relieve the possibility of stress cracks (also done on automatic
>>transmissions). On the steel crank, I was referring to a "High Quality"
>>(definitely not cast) crank.
>
>
>Ah, I get it. Stress builds up in sharp corners and edges.
>
>--
>Dave
>
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