Thread: 15.7" impeller on a 2HP dusty - a good thing?

Interesting question. I can fit a bigger impeller in my housing. This thread mentions this combo

Building The Dust Extractor System

If it is an efficiently designed impeller you'll overload and burn out the motor.
If it is an inefficient impeller the fan curve will be $hyte.
4HP or 5HP is usually needed for this size impeller.

What BobL said, that's a real quick way to burn a motor out- hope it's mounted outside

Its on this commercial model: https://www.timbecon.com.au/extracti...dust-extractor

Originally Posted by woodPixel

Its on this commercial model: https://www.timbecon.com.au/extracti...dust-extractor

It will probably have a derated impeller (reduce fin size) meaning it won't have a very good fan curve.
Just like a squirrel cage fan it will move lots of air but as soon as any restriction is put on it, the fan will cavitate.
If anyone in Perth has one I will be happy to measure its real performance specs.

Got any good photos of the impeller and the inside of the impeller housing?

Originally Posted by BobL

If it is an efficiently designed impeller you'll overload and burn out the motor.
If it is an inefficient impeller the fan curve will be $hyte.
4HP or 5HP is usually needed for this size impeller.

They claim an efficiently designed impeller but what they are probably relying on is that it will be connected to a 4" outlet on a machine via a 4" hose, and because of the restricted airflow draw nowhere near 2 HP.

I really would like to see a figure for current draw in actual use before I would call it a 2HP unit.