Reply by nutsandbolts

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Posted on Harbor Freight 2 hp dust collector questions

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20 posts in 3123 days

#1 posted 03-06-2021 09:09 PM

Why is a rear facing impeller better than a forward facing impeller? Rear facing impeller blades has no stall characteristics, has much better static efficiency (more bang for the buck, for static lift = vacuum power).

So, how come the HF fan uses a FORWARDS impeller blade? With zero resistance, you get huge CFM values.
Once you put some resistance in, like duct work, the CFM values bog down, the static lift values bog down.
Rikon Impeller upgrade is a good idea, if you also upgrade the electrical circuit (breaker and wiring)...and if you upgrade the diameter of your ductwork (pipe diameter) so you don’t overload the HF motor (bigger pipe means less current draw).

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