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Forum topic by Thedustydutchman posted 12-05-2021 06:46 PM 534 views 0 times favorited 14 replies Add to Favorites Watch
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Thedustydutchman

173 posts in 238 days


12-05-2021 06:46 PM

Well, its finally time for me to set up my dust collection. Don K’s reminder of “all this dust is gonna kill you” the other day really got me thinking. I have been reading and researching since then. I have an air scrubber thing in the shop already. That got hung up from the ceiling to help with airborne dust. I also have a single stage DC that I still need to set up. So here is my question, my DC is only a 1hp set up. Eventually I want to modify ala stumpy nubs with a big ol filter. It has a 5 inch inlet. Is this DC up to handling 6 inch tubing with only 1hp? I REALLY don’t have room for 6 inch but I can make it work if I have to. Would I be ok for 4 inch? My shop is quite small. And would be supporting only a few tools. In all my research people say 6 inch has 2x the cfm, I understand that but with only 1hp would it even make a difference?

NEVERMIND, just found the info I was looking for…..sorry to waste everyone’s time.

-- Jerry H - Holland Michigan


14 replies so far

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sunnybob

95 posts in 96 days


#1 posted 12-05-2021 07:13 PM

Stop faffing about and get something working. all dust WILL kill you, Anything is better than nothing.
But I have a 1 hp extractor pulling through 4” piping and its pretty good.

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Combo Prof

4902 posts in 2608 days


#2 posted 12-05-2021 07:45 PM

I used 4 inch (schedule 40 PVC) tubing for many years. I have various parts I’d be happy to give you.

-- Don K, (Holland, Michigan)

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Thedustydutchman

173 posts in 238 days


#3 posted 12-05-2021 08:11 PM

That would be much appreciated Don!

-- Jerry H - Holland Michigan

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Thedustydutchman

173 posts in 238 days


#4 posted 12-05-2021 08:50 PM

With the 4 inch can I drop it down smaller for my router and chop saw or is that not going to work? I’d really like to avoid having the scrubber, DC and a shop vac in my small shop

-- Jerry H - Holland Michigan

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Redoak49

5461 posts in 3319 days


#5 posted 12-05-2021 10:06 PM

A 1 up dust collector is barely adequate and will probably get some of the chips but will not be adequate to.give you clean air. Is it better than nothing…yes. I would attach it directly to the to tools and avoid the ducting. The.performance losses be greatly reduced by the ducting.

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Thedustydutchman

173 posts in 238 days


#6 posted 12-05-2021 10:15 PM

By using a flexible hose you mean?

-- Jerry H - Holland Michigan

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sawdust66

46 posts in 79 days


#7 posted 12-06-2021 03:08 AM

I agree with all that anything is better than nothing. Here are a few thoughts. Do NOT get rid of the air scrubber. The DC is great, but will not get everything, the combination of the 2 is night and day. Any chance you get get your hands on a used 2hp DC? or upgrade to a new 2hp unit? the HF 2hp version usually goes for about $200. If you can do either of those I’d say run the ducting, but if not I’d say just attach flexible hose to an individual tool and move it back and forth. Then when you can upgrade to a 2hp unit, run the ducting. Also 4” is fine for what you are doing, I used the green SDR35 from Lowes and it worked really well. Good luck.

-- Chris, Pennsylvania

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ibewjon

2745 posts in 4124 days


#8 posted 12-06-2021 10:52 AM

I have a 2hp DC with 5” steel duct. Works great. Try to upgrade to a 2hp machine before investing in the 4”. 5” is the sweet spot for the bigger machine. Your lungs will thank you

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Thedustydutchman

173 posts in 238 days


#9 posted 12-06-2021 12:13 PM

I will look into a 2hp unit. I could probably sell my 1hp to cover half the harbor freight one. Might just start with this and see what happens. Gotta get something going!

-- Jerry H - Holland Michigan

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JohnDon

212 posts in 2500 days


#10 posted 12-07-2021 12:04 AM

Just to embellish a bit. For adequate movement of dust particles, air speed needs to be 3000 fpm for horizontal runs, and 4000 fpm for vertical drops. Converting to collector cfm, you multiply fpm by the duct cross sectional area. 6 inch vertical duct needs 800 cfm, which is realistically beyond the reach of 1 hp DC’s; 4 inch ducts need only 350 cfm.

Agree that a DC and air cleaner (scrubber) are complementary- one can’t replace the other. Smaller tools, such as a ROS, need high vacuum (static pressure)/low volume, and a shop vac is much better than reducing DC duct fittings.

Finally, while it’s a PIA, the best prevention of lung damage from dust is to wear a face mask respirator; it’s also cheaper than anything else.

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Thedustydutchman

173 posts in 238 days


#11 posted 12-07-2021 12:13 AM

So 4 inch is the way to go if I’m going to stick with the 1hp DC then I’m assuming?

I was really hoping to avoid needing a shop vac set up along with the DC and scrubber. Will it really work THAT bad to use the DC with the smaller outlet stuff(router, chop saw and sander)?

I have a really nice RZ mask that I wear in the shop alot. Admittedly not all the time but when I’m sanding I wear it all the time. I really don’t mind wearing it that much and it definitely helps!

I feel like I’ve opened up a can of worms with this but it really does need to be done. Id rather not die from wood dust someday.

-- Jerry H - Holland Michigan

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sunnybob

95 posts in 96 days


#12 posted 12-07-2021 05:09 AM

My 1 hp motor and 4” ducting works quite well (notice, QUITE, not PERFECT, I cant afford perfect). I have it connected to 4 machines, each controlled by a blast gate.
I have one other outlet with a 15 ft flexible hose that I use as a floor and surface vacuum after finishing work.
That hose was 2” and it was pretty much useless, so I replaced it with 3”, and the improvement was dramatic. I really should replace that with 4”, but then it will be too unwieldy for me to lift and move around. What I and the others are getting at is that there are two types of dust collection systems, and they do not mix and match.

You have to have either a low speed fan with large pipe, or a high speed fan with small pipe to get decent dust collection. Choking down a wide low speed system to narrow just will not work.

Also your shop position makes a difference. I have a single car garage with a roll up door at either end. In hot weather I work with both ends open so the wind blows away airborne dust. One door is always open when I’m in there unless its actually raining. If yours is in a basement with no natural air movement at all, then you really should be wearing a mask all the time, and also have the air borne one running all the time youre in there, and on a timer so that it runs for a couple hours after you leave.

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Fred Hargis

7350 posts in 3824 days


#13 posted 12-07-2021 11:25 AM



So 4 inch is the way to go if I m going to stick with the 1hp DC then I m assuming?
- Thedustydutchman

Absolutely….mostly because that unit isn’t going to support 6”, the performance with 4” may or may not be to your liking.

-- Our village hasn't lost it's idiot, he was elected to congress.

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JohnDon

212 posts in 2500 days


#14 posted 12-07-2021 05:47 PM

Just experiment with your DC with smaller tools- if it seems to work acceptably, ditch the shop vac.

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