HF 2HP Dust Collector Mod

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Project by TheChucker posted 04-18-2010 01:36 AM 9097 views 31 times favorited 12 comments Add to Favorites Watch

After purchasing the Harbor Freight 2HP dust collector the other day on sale @ $139, I got to work modifying it as many others have done. I bolted the motor to the wall and connected a separator underneath. I cut the two hose sections from the existing hose that came with the DC and used those for both motor connections. The hose leading to the collection bag is there just to hold the motor to the collection ring, and the other hose is about 6” in length. Enough so I can slip it off to empty the bag.

The separator is the Thein design, and it works great. To integrate the system into my planned dust collection lines, I modified the design slightly for a side inlet. It makes for a smoother transition from the separator to the eventual collection lines. I found a roof vent housing piece at Home Depot that worked great for the inlet. I wrapped it around the contour of the trash can and put in about 20 sheet metal screws. I also used about a 1/4 tube of sealant both in between the trash can and the housing, as well as all the screw holes. The outlet on the top is a 5” diameter HVAC tube from the Depot as well.

I fired it up earlier, and it really works great. Now I just need to run some lines to my tools…

-- Wherever you go, there you are.

12 comments so far

View bigike's profile


4052 posts in 3312 days

#1 posted 04-18-2010 01:42 AM

nice, now you just need the filter for the top of the unit. I just forget the name of it though, thnaks for the reminder now i got my taxes i can get one or have to get one for that matter.

-- Ike, Big Daddies Woodshop,

View hotbyte's profile


991 posts in 3000 days

#2 posted 04-18-2010 02:37 AM

Looks great! I;ve got a $139 in store coupon kept trying to get one of those at nearby HF store and they are always out! I’m tempted to just order online at $179 plus a $10 gift card coupon code. HF is 50+ miles so it isn’t easy to keep checking. I’d like to add a separator like that once I get the DC!

View Dusty56's profile


11819 posts in 3712 days

#3 posted 04-18-2010 04:10 AM

Nice job on the seperator ! How many microns is the dust bag on top rated for ?

-- I'm absolutely positive that I couldn't be more uncertain!

View Rob's profile


22 posts in 3010 days

#4 posted 04-18-2010 06:41 AM

I just printed this and used it at my local store – it’s a deal.


-- Rob in Texas

View Chase's profile


448 posts in 3050 days

#5 posted 04-18-2010 02:25 PM

I got one of these dust collectors recently, and i am pleased. this looks another good take on the built in pre-separator. I hadnt thought of attaching it to the wall, i might have to consider this option. Thanks!

-- Every neighborhood has an eccentric neighbor. I wondered for years "who was ours?" Then I realized it was me.

View TheChucker's profile


38 posts in 3137 days

#6 posted 04-18-2010 02:44 PM

Thanks guys. I’ll probably go with the Wynn filter to replace the bag sometime soon. I’m going to see how it operates with the whole system first.

Dusty, the bag is rated for 5 microns.

-- Wherever you go, there you are.

View Ger21's profile


1074 posts in 3155 days

#7 posted 04-18-2010 03:55 PM

>>HF is 50+ miles so it isn’t easy to keep checking.

Don’t you have a phone?

Also, I’ve read that they’ll issue rain checks, and some have reported that they were able to use an additional 20% off coupon with the rain check, as the rain check had the $139 price and they no longer needed to show that coupon.

-- Gerry,

View Dusty56's profile


11819 posts in 3712 days

#8 posted 04-18-2010 07:15 PM

WOW , That’s cheap enough to be able to afford to buy the aftermarket cannister filter and still come out ahead of the game ! Is that strictly 110 volt or can it also run on 220v ?

-- I'm absolutely positive that I couldn't be more uncertain!

View hhesser's profile


1 post in 2971 days

#9 posted 05-02-2010 12:31 PM

Nice looking unit. Also great mounting job. Can that motor be wired foe 220 ?

View NoChatter's profile


8 posts in 3095 days

#10 posted 05-03-2010 01:57 AM

Yep, that motor can be wired for 220V.

Has anyone thought of putting two of these in parallel, since they are so cheap? Should get the cfm up around 1100 and allow for longer runs. You would need separate circuits on 110V and 30A for 220V. Amp draw when on 110V is around 15A with a little higher than that at start-up.

If you use the Wynn filter, modify it by adding the manual ‘flapper’ to keep the air moving through the filter. Remember to rotate the flapper often.

View jfin's profile


3 posts in 3021 days

#11 posted 05-12-2010 05:47 PM

NoChatter – there is no “rewire” option within the start/stop switch box to allow rewire to 240 volt. If there IS this option within the motor (probably behind the switch box?), please let us know.

There is an extended discussion re: putting two HF DC in parallel or in series. I believe it is in recent postings on the J. Phil Thien site. If not, post so & I’ll find it.

Has anyone ever found any actual “fan data” (static pressure vs. CFM) for this DC. I called HF Tech Support, they inquired, but were told the factory didn’t want to spend the $ to test it. Well – give them credit – it sounds like an HONEST answer to me! Jim Finnegan

-- Jim, East TN

View Roger's profile


20928 posts in 2828 days

#12 posted 04-07-2016 12:22 AM

Hey Chucker. You might want to check out Pauls post here: The Donaldson filter looks like it might be a good addition for less $$ than the Wynn. I have the same HF dc you have here also. I added the Dust Deputy to mine, and I’ve dumped my can about 10 times and my bottom clear bag only has a handful of dust in it, and the bag is still pretty much clear. I’ve been thinking seriously about trying out one of those Donaldsons myself in the near future. My upper bag is a mess.

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed.

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