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Air Filter is vibrating the floor overhead.

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Forum topic by Mainiac Matt posted 04-18-2012 06:19 PM 1262 views 0 times favorited 18 replies Add to Favorites Watch
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Mainiac Matt

3906 posts in 966 days


04-18-2012 06:19 PM

Hey guys,

I have a Jet 1000 series air filter that is mounted to the ceiling of my basement shop with the supplied sheet metal mounting plates (not the eye bolts) and it is generating a harmonic of sorts, so that there’s a fairly loud pulsing noise in the room upstairs (family room). In the shop below, you hear the noise of moving air, but none of the pulsing.

So I’m looking some ideas to shock mount the unit.

Complicating matters is that fact that the ceiling is only 7’ 6” and I need to be able to walk beneath the filter without clocking my head.

I was thinking of using something like these little rubber sandwhich mounts, as our millwork dept. at work uses them all the time for mounting small compressors in barista stands, but the application guidelines specifically say they are for compression and shear loads only.

-- Pine is fine, but Oak's no joke!


18 replies so far

View Loren's profile

Loren

7467 posts in 2285 days


#1 posted 04-18-2012 06:20 PM

You could try rope.

-- http://lawoodworking.com

View Mainiac Matt 's profile

Mainiac Matt

3906 posts in 966 days


#2 posted 04-18-2012 06:35 PM

I actually thought a thick rubber bungie cord migth be the ticket.

Hoping someone else has already paved the way and solved this problem.

Balancing the squirell cage fan might be another approach.

-- Pine is fine, but Oak's no joke!

View Grandpa's profile

Grandpa

3108 posts in 1313 days


#3 posted 04-19-2012 03:13 AM

Use threaded rods and flat washer with an inch or so of rubber hose between the washers. Let it hang on the rods. You should be able to keep it as high as it is now. Double nut everything to keep the nuts jammed so they won’t come off and drop the filter on you.

View TopamaxSurvivor's profile

TopamaxSurvivor

14727 posts in 2313 days


#4 posted 04-19-2012 05:16 AM

Grandpa, how is the rubber hose on a threaded rod going to stop vibration?

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Bagtown's profile

Bagtown

1712 posts in 2368 days


#5 posted 04-19-2012 05:19 AM

I’ve mounted fan units on rubber bungees with great success before. Make sure it’s the heavy black rubber ones and drill and screw through the rubber at the height you need.

Mike

-- Mike - In Fort McMurray Alberta

View Tyrone D's profile

Tyrone D

314 posts in 970 days


#6 posted 04-19-2012 05:39 AM

TopamaxSurvivor,
Rubber tends to stop vibrations. In studio or hi-fi applications specially designed rubber pads are put on the bottoms of monitors/speakers to prevent some vibration. The same principle is applied to using one rubber link between the eyelets on the air filter and the hook on the roof.

ssnvet,
If you do balance the fan please keep us informed on how it goes. My old Delta(Made in USA) air filter vibrates quite a bit.

-- --Tyrone - BC, Canada "Nothing is ever perfect, we just run out of time."

View TopamaxSurvivor's profile

TopamaxSurvivor

14727 posts in 2313 days


#7 posted 04-19-2012 06:03 AM

I am wondering how Grandpa is going to rig up his hose to do it?

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Loren's profile

Loren

7467 posts in 2285 days


#8 posted 04-19-2012 06:23 AM

I have a JDS hung on chains. It is audible but not a vibration
problem. Hard metal hanger would seem to me to be the
sensible thing to eliminate first. For me, chains are not a problem
and it makes sense that a soft material like rope would be even
less. Go crazy with rubber baby buggy bumpers if you that’s
what you like to do though.

-- http://lawoodworking.com

View Tyrone D's profile

Tyrone D

314 posts in 970 days


#9 posted 04-19-2012 07:17 AM

TopamaxSurvivor,
My apologies, I did not see that earlier. Now that I read his post a third time I’m curious as to how it’ll stop vibration as well.

-- --Tyrone - BC, Canada "Nothing is ever perfect, we just run out of time."

View zzzzdoc's profile

zzzzdoc

506 posts in 1641 days


#10 posted 04-23-2012 12:05 AM

I mounted mine on chains. Don’t have vibration issues. Strong enough rubber should work just fine, but make sure it can handle the load. Personally, I’d try chains first. Does someone make a rubber chain link?

-- Before you criticize someone, you should walk a mile in their shoes. That way, when you criticize them, you're a mile away and you have their shoes.

View Viking's profile

Viking

857 posts in 1833 days


#11 posted 04-23-2012 12:52 AM

You might consider hanging the air filter with springs such as;

http://www.homedepot.com/Tools-Hardware/h_d1/N-25ecodZ5yc1vZarnk/R-202045477/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=Springs&storeId=10051.

These may be overkill but if you used 4springs, each rated at at least half the weight of your filter you would never worry about spring fatigue.

Your jet probably weighs 55-60 lbs. so 4 springs, rated at 30 lbs. each, would be plenty.

Good luck.

-- Rick Gustafson - Lost Creek Ranch - Colorado County, Texas

View Grandpa's profile

Grandpa

3108 posts in 1313 days


#12 posted 04-23-2012 02:18 AM

Topamax, you mount the rods from the ceiling above. you slide the filter mounting hole up the rods and then slide the hose in place. install a flat washer and 2 nuts so you can jam them. Also jam the nuts on the top end. the filter box rests on the rubber hose and that dampens the vibration. difficult to explain on here.

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Grandpa

3108 posts in 1313 days


#13 posted 04-23-2012 02:23 AM

http://www.clearvuecyclones.com/assemblysheets/CV1800MaxAssemblySheet.pdf

Go to this Clear Vue site and look at page 9. Follow those pics. They show this in use.

View TopamaxSurvivor's profile

TopamaxSurvivor

14727 posts in 2313 days


#14 posted 04-23-2012 05:12 AM

Thx Grandpa. I thought it would be suppended some how. Never thought about setting it on top of the rubber hose ;-)

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Joseph Jossem's profile

Joseph Jossem

376 posts in 906 days


#15 posted 04-23-2012 05:39 AM

These are pretty quiet no vibration run it off the most secure place.hang and use rubber in between connections.

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