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Dust collector ( dust blower)

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Forum topic by Vest posted 08-31-2015 09:13 PM 764 views 0 times favorited 13 replies Add to Favorites Watch
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Vest

53 posts in 1083 days


08-31-2015 09:13 PM

Topic tags/keywords: dust collector whole shop dust collection question

I have been looking for a bigger dust blower for a while. I say blower because I am able to blow the saw dust strait out the back of my shop. I have a 1hp industrial motor and blower right now. It works fairly well, but tends to not be able to pull all the chips from my planer when planing a lot of wood ( running more than one board at a time through it). I have been looking at a 5 hp Grizzly for around $1300. I found a monster on Craigslist yesterday. 10hp 220 single phase motor with a 12inch intake. It has a 3ft by 3 ft foot print.The guy was asking $750 but came down to $600 cash. I have the wire and all to hook this monster up. It will take a 50 amp breaker . Just wondering if I would still be better off going with just a 5hp because of the electric this thing will use over the next few years. I am at a major dilemma . This is something I am going to be using for many years and need to make the best investment . I know this thing should suck the dust out of the whole shop with out sweeping LOL. Before anyone says they didn’t know you could get that big of a motor on single phase ,yes you can. The motor alone is worth around $1200 it being a Baldor . Thanks for any input.


13 replies so far

View Fred Hargis's profile

Fred Hargis

3926 posts in 1952 days


#1 posted 08-31-2015 09:32 PM

That would be just a little too big, IMHO. You won’t be able to plumb in 12” ducting (I’ll bet) so whatever you do will be starving the blower seriously. Good for long blower life, bad for noise. If you can resell it and get some extra, maybe…but for use in a hobbyist shop that would seem to be really, really, extreme. On the other hand you may have bragging rights for the largest shop blower on the forum (in a hobbyist shop).

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

View bearkatwood's profile

bearkatwood

1194 posts in 471 days


#2 posted 08-31-2015 09:54 PM

Sounds like to monster I have. I bought a three phase motor/vacuum used in machine shops for picking up iron plates. I probably won’t ever use it so I listed it on CL. It would probably blow the back of my shop off. Sounds like you have a good setup.

-- Brian Noel

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Vest

53 posts in 1083 days


#3 posted 08-31-2015 11:49 PM

Fred I have a 26 by 46 shop. With all 6 inch trunk line already. I figure I could leave all my blast gates open and give it enough air intake to not starve it. The unit is in a separate room as the rest of the shop. Right now I can’t hook up my table saw and a few other machines because the other blower won’t handle that much piping . I use another portable 1 for those machines. This is a full time shop. Not just hobbyist. I had always used a portable 2 hp Grizzly but wanted to get all the dust I could out of the shop. I first hooked up the 2hp and it didn’t have the power. A friend of mine told me he had this American Standard 1hp industrial blower that would be better I got it. It has worked better and does handle most of the shop till I get to around 40ft of pipe with 4in pipe running down to the machines. Then it looses the cfm’s needed.

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jonah

687 posts in 2758 days


#4 posted 09-01-2015 02:11 AM

Maybe buy the thing and try to swap the motor for a 5HP one? Seems like 10HP is going to be way, way more than you need.

View tomsteve's profile

tomsteve

393 posts in 678 days


#5 posted 09-01-2015 11:40 AM

im not the smartest on dust collectors and electric motors, but wouldnt RPM of the motor play into cfm? seems a 5 hp and a 10 hp spinning at the same rpms would cause the impeller to pull the same cfms. does the rpm increase with hp of a motor?

View rwe2156's profile

rwe2156

2187 posts in 940 days


#6 posted 09-01-2015 12:18 PM

If the electricity cost isn’t too big a factor, I would go for the 10HP.
Factors that come to mind:

What’s the longest run?
Do you leave it running or turn it on and off?
Do you use multiple machines at the same time?
Are you planning on adding more machines in the future?
Are 6” ducts going to work with a machine this big?

I don’t know what the running amps would actually be, but the load factor on a blower motor is pretty constant, not like a compressor. Might be worth running it past an electrician.

You do have a dilemma but I dont’ think I’ve helped you much…..

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

View Fred Hargis's profile

Fred Hargis

3926 posts in 1952 days


#7 posted 09-01-2015 02:34 PM

6” ducts will still starve it even with the all the gates open (just a guess), but with the description of your shop I’d say you could probably utilize that behemoth…

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

View bigblockyeti's profile (online now)

bigblockyeti

3663 posts in 1180 days


#8 posted 09-01-2015 06:01 PM

Go for it, even if it is starved for air a little, it won’t hurt it, in fact it will pull fewer amps. I would double check the SFA listed on the motor nameplate, it may be more than 50 amps. Even if it’s not pulling that when up to speed, it can be indicative as to what it could draw while getting up to speed and that may spell frequent breaker tripping.

View buildingmonkey's profile

buildingmonkey

242 posts in 1007 days


#9 posted 09-01-2015 06:19 PM

Am afraid you would use all the power available to your shop, just to run the dust collector. Ideal for shops the size of yours are about 3 to 5 hp. Impeller is the important thing, would be nice to have at least 15”.

-- Jim from Kansas

View Vest's profile

Vest

53 posts in 1083 days


#10 posted 09-01-2015 08:38 PM

My shop has a 200 amp service. the motor needs a 50 amp breaker when first starting. Then it drops down to around 30 – 35 amp. The impeller on it is 24 inches by 10 inches wide. My only problem is wondering how much electric it is going to use over a years time. I talked to a electrician and he says it will use about the same as a window air conditioner. I am planning on adding more machines in time. I am also considering buying a band saw mill in time. Then I can cut my own specialty woods.

View jonah's profile

jonah

687 posts in 2758 days


#11 posted 09-02-2015 02:02 AM

There’s no way a 10HP motor that draws 30-50 amps at 240VAC is going to cost the same to run as a window air conditioner. No way. Of course, it depends on how much you use it, but 35 amps at 240VAC is 8400 watts. Your average air conditioner draws about 800-1200 watts. That’s a factor of ten difference, my friend.

View Vest's profile

Vest

53 posts in 1083 days


#12 posted 09-02-2015 02:15 AM

Jonah. Sounds like you know what you are talking about. I would be using this about 40 hrs a week. That is turning it off and on as needed ,7 days a week. so can you tell me about what I would be looking at in watts a week? Like I said the guy I talked to is a electrician ( doesn’t mean he knows beans about electric motors though). This is why I am at such a dilemma. I don’t mind for it to go up some. But not double. LOL. Like I posted I have been looking at a 5hp Grizzly. I know the motor on it won’t be a Baldor though.

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jonah

687 posts in 2758 days


#13 posted 09-02-2015 11:27 AM

Just multiply 9000 (to account for all the starting and stopping) by 40. That will give you how many watt-hours you will use. Divide by 1000 to get kilowatt-hours. Your electric bill will tell you how much you pay per kilowatt-hour. That’s how much it’ll cost you to run for a month. Figure a 5HP motor will draw half the watts, so divide by two to figure how much that’ll cost in comparison.

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