dust cyclone advice needed

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Forum topic by Karda posted 10-20-2019 10:55 PM 351 views 0 times favorited 5 replies Add to Favorites Watch
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1798 posts in 1098 days

10-20-2019 10:55 PM

Hi, i made a dust collector per the many instruction on Utube. It works good but when the vacuum is on and the picup hose ia attached to the collector there is a very loud whistle start to vacuum and it stops unplug the pickup hose from the collector and it stops. Any idea how I can stop this whistle thanks

5 replies so far

View Fred Hargis's profile

Fred Hargis

5812 posts in 3038 days

#1 posted 10-21-2019 10:18 AM

The whistle is almost certainly an air leak, you’ll need to find it and plug it up. That’s often hard to do (finding it), try sealing all the joints with silcone caulk. You might find the leak by using some smoke, or if you have a downy feather move it around all the joints. It will show you where the leak is.

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

View Brawler's profile


86 posts in 375 days

#2 posted 10-21-2019 10:36 AM

I have a Leaf vacuum,that does the same thing when I put my “home made ” hose on it. You found the harmonic resonance flow/frequency of that hose. If you were to shorten the hose the sound would be higher pitch until you wouldn’t hear it anymore. Same thing with lengthening the hose, the pitch would get lower until you didn’t hear it anymore. Yes a leak could cause it by changing that frequency, kind of like a a flute or recorder.

-- Daniel

View Karda's profile


1798 posts in 1098 days

#3 posted 10-21-2019 03:46 PM

ok thanks

View Kelly's profile


2473 posts in 3489 days

#4 posted 10-22-2019 06:20 AM

Cyclones MUST be sealed or they lose efficiency. I use foam, such as would be used on a house exterior door, pipe tubes or whatever fits my need of the moment.

I keep incense in the shop to test for suction between the lids and cans. I find one, I adjust the seal.

View WhyMe's profile


1184 posts in 2105 days

#5 posted 10-22-2019 01:56 PM

While it’s whistling have you pushed down around on the edge of the lid to see if the whistle stops?

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