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HF 1hp dust collector actual vs spec power

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Forum topic by dups41 posted 06-06-2017 12:12 PM 1204 views 0 times favorited 8 replies Add to Favorites Watch
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dups41

4 posts in 191 days


06-06-2017 12:12 PM

Topic tags/keywords: question

Hi,

I have been wanting to upgrade my shopvac and dust deputy to something that might help reduce the layer of dust that ends up coating everything in my garage.

I got hold of a 1hp harbor freight dust collector. I have no point of reference to know if it is working properly and just ended up measuring power consumption as a check. The highest value I could get was with inlet hose removed and filter bag removed. Current consumption was around 5.3A with a power factor of 0.95 so about 550W or 0.74hp. I suspect this is probably as much as you can hope for vs the HF specs, but it would be really useful to know if anyone has measured similar values or whether I have a dud. Adding the bag and a 2-1/2 hose cuts the power consumption in half and not very much air seems to move. It will be 4-in hose eventually, but 2-1/2 is all I had for a quick initial test.

The plan is to mount the blower on top of a trash can with a Thien baffle of sorts and vent out the garage door with no filter. Any advice on whether this is feasible? Or is a larger blower necessary? Main uses would be for table saw, router and planer

Thanks,
Andrew


8 replies so far

View a1Jim's profile

a1Jim

116568 posts in 3413 days


#1 posted 06-06-2017 01:23 PM

High Andrew
Welcome to Ljs
If what you have is the 1hp unit I bought one to use as a dust collector for my router in my side feed table and I was very disappointed with its power and returned it, on the other hand, I have several 2hp HF units that have worked very well for me. With a 20% coupon, you can purchase them for around $160 or less if their on sale

https://www.harborfreight.com/2-hp-industrial-5-micron-dust-collector-97869.html

-- http://artisticwoodstudio.com Custom furniture

View Carl10's profile

Carl10

68 posts in 293 days


#2 posted 06-06-2017 06:31 PM

Andrew,

The current sounds about right for a 1HP motor. As Jim said you should also expect very poor airflow. Not sure of the impeller size on the 1HP but on the 2HP they used a severely undersized impeller. It under performed every 1.5HP and 2 HP DC in this test (http://www.portercable.com/uploads/PCD/Documents/News/182DustCollectors.pdf). If you look at the CFM chart at the lowest curve you will see a 1HP (not HF) DC as a reference point, and it is well below the airflow needed as a DC. When you add any separator you will lose even more airflow (expect ~40% drop with a Thien baffle). When you subtract that from the 1HP machine shown in the graph you will be slightly better than a good vacuum but no static pressure (assuming your HF performs the same as the 1HP DC shown).

The 2 1/2 inch hose will add a lot of static pressure and really lower performance as well.

Hope that helps,

Carl

View dups41's profile

dups41

4 posts in 191 days


#3 posted 06-07-2017 02:04 AM

Thanks a lot for the suggestions. I think I will be returning the 1hp version and getting the 2hp instead. Do you happen to know if it will run reliably on a 15A breaker without tripping all the time? I have a 20A 110v and a 20A 220v circuit for tools and then a general lighting and sockets 15A breaker that the dust collector would ideally run on.

View josephf's profile

josephf

171 posts in 1933 days


#4 posted 06-07-2017 02:04 AM

i put a 1hp jet on a ebay cyclone . direct vent . does very well . i have a1 1/2 hp and the 1hp .both with cyclones .both use a flexible hose that will go to one power tool at a time .they are both pretty close in performance . if you are direct venting it outside and not catching 99% or so you most likely will have a mess out there that just seems to get back inside somehow .with the cyclones i have i see very little or nothing going outside . i am not partile to the thien , the one i made anyhow wasn’t that impressive .just caught larger stuff .

View a1Jim's profile

a1Jim

116568 posts in 3413 days


#5 posted 06-07-2017 02:08 AM

I believe my units are running on 15amp breakers without an issues

-- http://artisticwoodstudio.com Custom furniture

View dups41's profile

dups41

4 posts in 191 days


#6 posted 06-07-2017 02:21 AM


I believe my units are running on 15amp breakers without an issues

- a1Jim

Thanks – I am going to give it a try.


i put a 1hp jet on a ebay cyclone . direct vent . does very well . i have a1 1/2 hp and the 1hp .both with cyclones .both use a flexible hose that will go to one power tool at a time .they are both pretty close in performance . if you are direct venting it outside and not catching 99% or so you most likely will have a mess out there that just seems to get back inside somehow .with the cyclones i have i see very little or nothing going outside . i am not partile to the thien , the one i made anyhow wasn t that impressive .just caught larger stuff .

- josephf

I think I will try it out and if there is too much mess then either add an ebay cyclone (do you perhaps have a link?) or with the 2hp HF model perhaps just shell out for a canister filter.

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a1Jim

116568 posts in 3413 days


#7 posted 06-07-2017 02:32 AM

Actually I have vented outside for years, I have the motor hanging on the wall inside with the flexible dust pipe going through the wall and the top bag and a large trash can outside housed in a small wall mounted shed, no mess at all.
Doing it this way cut’s down on noise and saves floor space.

-- http://artisticwoodstudio.com Custom furniture

View dups41's profile

dups41

4 posts in 191 days


#8 posted 06-12-2017 04:09 PM

I exchanged the 1hp hf model for the 2hp version. Thanks for the advice – for a fair increase in size and noise the new one moves a whole lot more air. It has no problem running on my 15A breaker even with startup current that peaks around 30A. Steady state max load current is 12-13A.

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