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Dust Collector CFM change with Mods

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Blog entry by Monkeyman1 posted 07-05-2015 05:24 PM 916 reads 1 time favorited 12 comments Add to Favorites Watch

This is ment to give and idea of what happens to air flow when we do mods to a dust collector. I have been getting along with my vacuum ok, but time to upgrade. After stalking (lol) this site for a few months and checking Craig’s list all the time, I decided to buy a HF dust collector. I feel for the price it is very tough to beat.
This is a very unscientific test and due to either bad jack on my cellphone (new Cat S-50) or due to the cheapness ($40) of a ABM-100 anemometer. This is ment to show the decrease r increase of given mods I will do over time. I will take 6 readings and averaged them, all readings will be at inlet.

Test #1, Bare blower with 5” adaptor attached. CFM was 559

Test #2, Assembled, with new dust bag. CFM was 461.

I also took measurements of the fan blade and it was 10” wide, 1 5/16 deep, 7 vanes total. I also measured the open area from tip of vane to housing opening and had about 1 3/16 of space left incase I want to try a differant fan.

-- I work with the public, therfore, I am Brain Damaged!



12 comments so far

View WhoMe's profile

WhoMe

1468 posts in 2709 days


#1 posted 07-06-2015 05:43 AM

Bookmarking this to follow your progress.

-- I'm not clumsy.. It's just the floor hates me, the tables and chairs are bullies, the wall gets in the way AAANNNDDD table saws BITE my fingers!!!.. - Mike -

View Monkeyman1's profile

Monkeyman1

25 posts in 522 days


#2 posted 07-06-2015 09:36 AM

My plans are to add a Wynn filter (nano?), Thien baffle built in a drum separator and mount the motor in line with the ring. Possibly add a different blower fan. This is going to take some time.

-- I work with the public, therfore, I am Brain Damaged!

View Roger's profile

Roger

19881 posts in 2270 days


#3 posted 07-07-2015 12:40 PM

I’ll be following along as well. I’ve been wanting to add a Wynn to my HF collector.

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed. Kentuk55@yahoo.com

View WoodNSawdust's profile

WoodNSawdust

1417 posts in 642 days


#4 posted 07-07-2015 01:38 PM

Thanks, keep up the good work. I also will look forward to your results.

-- "I love it when a plan comes together" John "Hannibal" Smith

View Monkeyman1's profile

Monkeyman1

25 posts in 522 days


#5 posted 07-07-2015 11:36 PM

Today, I got a bug up, you know where, and bought a Wynn nano filter. When I called, I talked to Dick, very nice guy and answered my questions. I feel good about spending so much money on a filter as my background is automotive and know a filter is not a filter!

Now all I need is more time!

Question on the separator…Seeing how this unit has a 5” inlet on the fan, should I go with a 6” inlet on the separator?

-- I work with the public, therfore, I am Brain Damaged!

View Monkeyman1's profile

Monkeyman1

25 posts in 522 days


#6 posted 07-12-2015 06:55 PM

This weekend.

The honey do list is normal and still not done. I did manage to build a roll around cart tho. I did find a fiber drum (free) and built it around it. It would be awesome as it is 38” tall, 22” wide about 65 gallon. After I put the cart together I realized, this would put the filter way to tall to in the basement …lol. I guess, I have to wait till Monday and measure the fiber barrels, I can get for free at work. SO, no flo data this weekend, sorry.

-- I work with the public, therfore, I am Brain Damaged!

View Monkeyman1's profile

Monkeyman1

25 posts in 522 days


#7 posted 07-19-2015 09:36 PM

No CFM reading yet, But I figured out something I have YET to see. I figured out a way to lift this heavy motor/fan assembly up and keeping it simple. A screw lift, atleast that is what I am calling it. I used kitchen drawer slides and 5/16 rod. When I am done I can use either a drill or wrench to raise and lower the motor.

I did manage to get the top lid made and the inlet section fitted and sealed (atleast from the inside). I did make a wooden section to help stabilize the ducting..

I did receive my Filter and all I can say is “O MY” very nicely made filter!

-- I work with the public, therfore, I am Brain Damaged!

View Monkeyman1's profile

Monkeyman1

25 posts in 522 days


#8 posted 07-19-2015 09:36 PM

Double tap

-- I work with the public, therfore, I am Brain Damaged!

View Monkeyman1's profile

Monkeyman1

25 posts in 522 days


#9 posted 07-25-2015 08:20 PM

I had time today. I borrowed a meter from work the measures FPM and used my CFM meter.
Today, I measured motor in a Horizontal plane and vertical plane, then with it put on my drum.

Horizontal plane, meaning normal building of these units and not mounted to the drum.
Inlet…..... 7100 FPM and 1097 CFM
Outlet…...5018 FPM and 815 CFM

Vertical plane, meaning on my stand I made.
Inlet….....over 10,000 FPM ( maxed out meter) and 800 CFM
Outlet…..6200 FPM and 766 CFM

Vertical plane, mounted ontop of my drum. Inlet sealed. I am using the normal inlet unmodified from the (5 in.) motor and the inlet to my drum is 6 in.
Inlet…..3010 FPM and 667 CFM
Outlet…3719 FPM and 655 CFM

-- I work with the public, therfore, I am Brain Damaged!

View Monkeyman1's profile

Monkeyman1

25 posts in 522 days


#10 posted 07-26-2015 08:20 PM

Today, I had some more my time (wife thinks I am nuts). I put more together, this time is the bag collector. I mounted the collector and Wynn filter. Getting the collector square to the fan outlet was not hard.
These measurements are from the inlet side only.
Base collector with bag
CFM 580….FPM 2774
Base collector with bag and Wynn Filter installed
CFM 567…FPM 2750

I am currently working on a thien baffle for the drum seperator and those figures will be added when I get it.

A few notes.
I have notice a few things building this that is not making sense to me. I will post more about the actual inlet and outlet diameters. It is not what they say it is!
When I was measuring the inlet readings of the motor itself, I damn near lost the devices in the fan!! My CFM meter lost connection and started to pull out of the phone, LOL. The Extech was spinning so fast I thought it was going to blow apart. I was actually amazed laying the motor on it side produced better reading.
When I am totaly done. I can take readings all at one time as this is a modular design. I will get all readings done at once and in a short time.
The more this thing get built the quieter it gets (thank goodness the wife will kill me).

Am I missing anything? Should I get another drum and change the inlet to a 4”? Would it benefit?

-- I work with the public, therfore, I am Brain Damaged!

View Monkeyman1's profile

Monkeyman1

25 posts in 522 days


#11 posted 08-02-2015 05:13 PM

I had time to install the Thien Baffle and took reading, I averaged 613 cfm today. I did notice and measured both the inlet and outlet they both where 4.5 inches. I am going to cut out the screen on the inlet side and may be open that up alittle to see if the cfm changes?
I thought I would show you guys how I attached my filter. I had wire for picture frame hanging and used a piece of hard maple.

-- I work with the public, therfore, I am Brain Damaged!

View Roger's profile

Roger

19881 posts in 2270 days


#12 posted 08-02-2015 06:43 PM

Very ingenious using those eye bolts and wire.

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed. Kentuk55@yahoo.com

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