I really don't think a vacuum is going to provide enough pressure to blast the chip from the flute of a rotating cutter. My suggestion was to use the force of the air blast to clear the flute - not to simply clear the path of chips. The chips tend to want to stick to the flute right at the cutting edge. As the cutter rotates, the next cut on that flute welds the sheared aluminum to the previous chip and the cycle continues until you have a spinning aluminum lolipop.
Using an air blast should be a second choice to flood or mist coolant for aluminum but it is effective for small diameter tools. Air volume is not critical - a directed pressure stream is the key.
Scott
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