Dust Collection

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Forum topic by jackass posted 12-17-2009 04:46 PM 1022 views 1 time favorited 3 replies Add to Favorites Watch
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350 posts in 3737 days

12-17-2009 04:46 PM

Topic tags/keywords: question

Hi Everyone,
I just purchased an old forced air furnace fan with motor for $30.00. My aim is to convert it to a dust collector, the motor is 2500 rpm’s and the fan is large, I don’t know how many cfm’s. My question, can it double as a vacuum if I close off both sides of the squirrel cage body and cut a 4” hole in the plywood cover opposite the drive belt side to suck up saw dust and blow it outside the basement? I would then pipe it to the various tools I have ie; planer, table saw, sander, miter saw, etc. to hopefully keep the dust down. Any suggestions on procedure will be greatfully appreciated.

-- Jack Keefe Shediac NB Canada

3 replies so far

View PurpLev's profile


8536 posts in 3673 days

#1 posted 12-17-2009 05:11 PM

this motors/cages are designed for low-cfm, low pressure air circulation operation, and would not be fitting for a DC where you want high pressure, and high CFM.

think of it – the AC/furnace units are trying to circulate the air in the house without disturbing it much (you wouldn’t want to feel a tornado in the living room), which is the complete opposite of a vacuum cleaner that is trying to stir up the dust and suck it away.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View DannyBoy's profile


521 posts in 3890 days

#2 posted 12-17-2009 06:52 PM

It won’t be powerful enough to be a dust collector. The problem isn’t even the motor as much as the blades on the impeller. I tried to do it myself.

What it will work for (and very well) is as an air exchange. I had a mobile cabinet in the shop that I installed one of these in, sealed it up, and put furnace filters (high rated) on the one end. It cleans out the air pretty well.

Here are a couple of examples that are here on Lumbjocks:

There was one not too long ago that used vacuum bags along with air filters that was pretty cool, but I couldn’t find it to add to the list.

-- He said wood...

View jackass's profile


350 posts in 3737 days

#3 posted 12-20-2009 03:32 PM

Hi PurpLev and DannyBoy,
Just to thank both of you for your input, I have a couple of things to try, experimenting has always taught me to be persistent. I will post if I achieve success, again thankyou.

-- Jack Keefe Shediac NB Canada

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