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commercial dust collection for home use?

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Forum topic by tedzap posted 03-09-2015 09:02 PM 739 views 0 times favorited 10 replies Add to Favorites Watch
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tedzap

6 posts in 1180 days


03-09-2015 09:02 PM

At an auction held at a large furniture shop I picked up the smallest of three dust collection systems. This one was a baby in comparison to the others, but the cyclone is still 5’ tall and 2’ around (approximate). It is made out of galvanized sheet metal. It has a cast iron centrifugal fan and a 3hp single phase motor.

This thing is made to support multiple machines simultaneously, is dust collection overkill in a garage hobby shop ok?

Because of it’s size (and likely the noise) I am thinking about mounting it in a closet outside the garage. If I do this, is it ok to use a flexible hose and make a turn below the cyclone and direct the chips to a barrel inside the garage? That side of the garage is fairly inaccessible, and emptying a barrel over there would be a pain..

Thanks
Ted


10 replies so far

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Rob

704 posts in 2538 days


#1 posted 03-09-2015 09:31 PM

Nice score! That sounds like just the right size for a centralized dust collection system. Your plan sounds good, but you might have less chance of clogging if you use a wye or long sweep pipe instead to deposit the chips inside.

Have you considered putting in a door between the garage and cyclone closet, for easy access to the barrel from inside the garage?

-- Ask an expert or be the expert - http://woodworking.stackexchange.com

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tedzap

6 posts in 1180 days


#2 posted 03-09-2015 09:52 PM

thanks.

I thought about having a door to access the barrel (outside), but the bottom three feet of the wall is made from concrete block and cutting through them would be a pain… I would also have to relocate propane lines that follow the block. While this can be done, it would be much simpler if I could have some sort of chute to bring the chips inside.

The bottom discharge of the cyclone is a round pipe connection, probably 9 or 10” diameter. Do you really think that I could have clogging issues?

I am thinking about leaving the fan and motor inside the garage, with the closet being sized just for the cyclone. Is the fan the main source of noise, or is it the air moving in the cyclone/pipes?

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Woodendeavor

276 posts in 2074 days


#3 posted 03-10-2015 12:04 AM

If you are concerned about noise there may be another option. The commercial shop I am currently working in has a large outdoor cyclone for our dust. The motor is mounted inline just before the duct leaves the building keeping it and all of it’s noise inside and the cyclone sits quietly outside.

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JAAune

1646 posts in 1784 days


#4 posted 03-10-2015 02:02 AM

A 3HP system can be ducted to multiple systems but it’ll be underpowered if you are wanting to collect from multiple machines at the same time. Normally you’ll just run one machine at a time and keep the rest of the blast gates closed.

Even though emptying the barrel would be a pain on the outside, it will save you from having to drag a dusty barrel around the shop. That might make up for the hassle of going out to empty it.

-- See my work at http://remmertstudios.com and http://altaredesign.com

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tedzap

6 posts in 1180 days


#5 posted 03-10-2015 03:13 AM

Going from the “dust producing tool” back, I was thinking 4” flex to 4” pvc which ties to a 6” header running the length of the garage outer wall. This header attaches to the cyclone, while the motor/fan pulling on the cyclone are inside. The fan would exhaust directly to the outside without a filter, only some sort of bug/bird/squirrel cage.

Does this make sense?

I know this arrangement will suck out any conditioned air, but I will worry about that next winter. Most of my work is done with the garage door open. Next winter maybe a big cartridge filter or a cabinet with furnace filters. Depends on how efficient the cyclone is.

View Rob's profile

Rob

704 posts in 2538 days


#6 posted 03-10-2015 03:40 AM

As for duct size, go 6” for as far as you can. You can find calculators online to see how much static pressure loss you have due to the duct sizes bends, and transitions.

Venting outside is optimal for exhausting the dust, but make sure you also have an equal-size inlet into the shop.


I thought about having a door to access the barrel (outside), but the bottom three feet of the wall is made from concrete block and cutting through them would be a pain… I would also have to relocate propane lines that follow the block. While this can be done, it would be much simpler if I could have some sort of chute to bring the chips inside.

The bottom discharge of the cyclone is a round pipe connection, probably 9 or 10” diameter. Do you really think that I could have clogging issues?

As long as you use steep angles you’ll probably be fine. But if you have any horizontal or close-to-horizontal runs I could see it clogging up if it’s just gravity-fed.


I am thinking about leaving the fan and motor inside the garage, with the closet being sized just for the cyclone. Is the fan the main source of noise, or is it the air moving in the cyclone/pipes?

I would have assumed the fan and motor would be noisy, but I guess you would be a better judge of that if you’ve had a chance to run it.

-- Ask an expert or be the expert - http://woodworking.stackexchange.com

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crank49

3981 posts in 2438 days


#7 posted 03-10-2015 08:52 AM

Offset with the dust chute should not be a problem.
The most important thing in that area is it has to be completely air tight.
ANY leakage into the bottom of the cyclone will have very large effect on the dust collecting efficiency.

-- Michael: Hillary has a long list of accomplishments, though most DAs would refer to them as felonies.

View rwe2156's profile

rwe2156

2200 posts in 948 days


#8 posted 03-10-2015 11:44 AM


This thing is made to support multiple machines simultaneously, is dust collection overkill in a garage hobby shop ok?

Because of it s size (and likely the noise) I am thinking about mounting it in a closet outside the garage. If I do this, is it ok to use a flexible hose and make a turn below the cyclone and direct the chips to a barrel inside the garage? That side of the garage is fairly inaccessible, and emptying a barrel over there would be a pain..

Thanks
Ted

- tedzap

No such thing as too much suction, bro.
With that size I would run 6” mains.
I would still use blast gates. You’ll lose too much CFM’s leaving everything open.
You shouldn’t have a problem running the flex inside to the collection bin.
What about keeping the unit inside and building an insutlated closet around it?
While you’ve got your machines running, the duct collector noise won’t be a big deal.
Can you exhaust to the outside?

-- Everything is a prototype thats why its one of a kind!!

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tedzap

6 posts in 1180 days


#9 posted 03-10-2015 05:17 PM

I can exhaust the outside, and I plan to for the time being.

I could mount the thing in the garage, but by napkin it will be tight. Standard collection barrel on wheels is about 40” tall (at least what I have on hand). Assuming the discharge flex hose is at least 6” puts the top of the cyclone at 98”. There currently is a 10” → 6” reducer that is 8” tall. At this point I will have to turn 90 degrees as I run out of ceiling room.

Hate to give up the space, but it is an option.

Anyone know of a good cap I can put on the exhaust outlet to keep the critters out? Hopefully something that doesn’t act like a big whistle :)

So should I use PVC or sheet metal piping? If PVC should it be schedule 40 or can I use the thinner wall stuff? Who makes good blast gates?

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tedzap

6 posts in 1180 days


#10 posted 03-10-2015 05:20 PM

not sure what I am doing wrong with posting the image, but here is the link:

http://i585.photobucket.com/albums/ss295/tedzap/DC%20fan%20and%20motor_zpsk1ukigti.jpg

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