Re-Uses #4: A Miss

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Blog entry by ChunkyC posted 10-23-2011 08:37 PM 1247 reads 1 time favorited 4 comments Add to Favorites Watch
« Part 3: Dishwasher Rinse Aid Bottles Part 4 of Re-Uses series no next part

Here’s one that didn’t work. I picked up a bag of 1-1/4” hose at the hardware store that’s sold for sump pumps. Visually, it looks almost identical to 1-1/4” vac hose, almost.

I had visions of using it to make some sort of sanding / dust collection station, similar to the Festool vac using my ShopVac.

So it’s a 1-1/4” hose what’s the big, deal right? Well this hose is just enough different from the hose that’s sold for vacs to big a HUGH problem. For some reason it generates a deafening harmonic. I mean a squeal that would make your ears bleed if you didn’t have hearing protection in. I wish I was joking.

I did try cutting a shorter length of hose to try:

This is better. It still has the same harmonic but the amplitude is much less and depending on how I hold the sander, I can make the harmonic go away. I suspect that I may be restricting the air flow just enough to dampen the harmonic. Otherwise it goes into the under-damped region and squeals.

If anyone has any ideas on how to possibly dampen the harmonics, I sure would love to hear them.



-- Chunk's Workshop pictures:

4 comments so far

View tenontim's profile


2131 posts in 3797 days

#1 posted 10-23-2011 09:59 PM

I buy the hose used for cleaning swimming pools. Comes in 25’ sections, at about half the cost of the vacuum hose that’s sold by the woodworking supply houses. No squealing here.

You might try putting a “Y” near the vacuum, to reduce the amount of air flow you have going through the hose.

View ChunkyC's profile


856 posts in 3306 days

#2 posted 10-23-2011 10:57 PM

“to reduce the amount of air flow you have going through the hose.”

Sort of defeats the purpose of having dust collection.

I’ll look for the swimming pool hose. Not sure where to find that around here. Probably will have to make a trip to The City for that. On second thought, Wally World! ;)

Thanks for the tips.


-- Chunk's Workshop pictures:

View cutmantom's profile


405 posts in 3087 days

#3 posted 10-24-2011 02:55 AM

wally world yes but you may have missed pool season, then again if they still have some they are probably on sale, you can also look at Lowes, I think they sell it by the foot

View Sylvain's profile


708 posts in 2552 days

#4 posted 10-24-2011 05:06 PM

For those interested in building a real organ in wood which is not only a musical instrument but also a nice piece of furniture, visit the site of Raphi Giangiulio :

The construction is explained in great details.

Just kidding ;-))

If you visit the site above, you will see that even with a limited flow you can make a lot of (noise)wonderful sound.

One can absorb mechanichal vibrations with a little mass with a spring tuned to the annoying frequency.
By analogy i suspect you could absorb the sound with a cavity tuned as a resonator placed in derivation on the hose.

As any one tried this technique?

See also “acoustic resonance” on wikipedia.

As said above, limiting the flow defeats the purpose of having dust collection.

-- Sylvain, Brussels, Belgium, Europe - The more I learn, the more there is to learn

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