Quote:
Originally Posted by skimoose
Also, remember that the load on the motor will be greatest when moving air before your block air flow. As the vacuum is developed, the air resistance decreases and the lowest loads will be when the impeller system is rotating in a near complete vacuum.
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Also I would like to point out there are 2 underlying concepts that define each vacuum's performance. Flow (CFM) and Static Pressure ( in-H20). Each one of these things brings something different to the table to create a concept known as Air-Watts. A vacuum impeller/motor combo can be configured for many different applications and the cost of the vacuum is directly dependent on this factor. Most Sub $100 vacs are designed with Flow in mind, as the average consumer interprets high velocity of air as power. The real thing is the static pressure, which determines the "mussel" of the vac.
If you are planning on stripping the blower out of a Vac try to get one with a higher static pressure and lower CFM, That combination will allow you to hold on to the ball better with a lower power consumption than one that has both a high CFM and static pressure.
If teams are interested in just getting the impeller/motor instead of the entire vac, check out AMETEK
http://www.ametekfsm.com/ as they are the industry leader and you will probably save money then getting a vac a home depot and tearing it down.