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Mounting fans to the flex bay

post #1 of 8
Thread Starter 
I want to mount some fans in the flex bay but without using the radiator, so I purchased some radiator screws 6-32 30mm but the problem is I need some nuts that fit this type of screw and struggling to find some in the UK any help would be appreciated, thanks.
post #2 of 8
All the CL FlexBay rad mounts use very thin aluminum, much thinner than the top and side(lateral) radiator mounts, and they transmit noise easily and readily even when using the donut grommets CL provides.

All that noise is absorbed nicely when using fans and a radiator filled with coolant, BUT if you use the FlexBay rad mounts with NO radiator and just for fans you will have quieter overall operation if you go with soft silicon fan grommets instead of hard screws.

If you wish to keep the fans quiet up to 40% to 75% PWR depending on which fans you have chosen, get a set of these soft silicon grommets for each fan.

Why would you want to hard-mount a component that produces rotational noise energy? headscratch.gif







http://www.performance-pcs.com/nexus-ultra-soft-silicone-fan-mounts-set-of-4.html


Also, this soft fan grommet by Acousti.com I believe are available in the UK if you cannot find the Nexus brand, the Acousti are softer than the Nexus brand, so I use them with lighter weight fans. Using these with heavy fans ie: over 300grams will overwhelm these grommets and you will still have some noise. The Nexus work better overall.


http://www.acoustiproducts.com/en/ultra_soft_fan_mounts.asp


If you are using closed-frame fans, these Akasa on the left work well, the Lamptron brand on the right are hard plastic NOT soft silicon as they appear to be and they transmit noise energy almost as well as metal screws, so not recommended.



Edited by iBruce - 2/12/17 at 4:26am
     
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post #3 of 8
Thread Starter 
Fantastic information iBruce this has helped a lot, ordered some right away, thanks 😀
post #4 of 8
These are cheap and you get 36 of them for $6 but the catch is you'll need needle nose pliers to properly attach them to the fans as they are on the short side and can't be pulled through like the long ones can.

They work great though.

I only broke 6 of them when installing but they are so cheap and you get so many it isn't an issue.
    
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post #5 of 8
They are cheap for a reason, I've used them, they are hard rubber, probably the scrap rubber from tire manufacturing.


The density of noise absorbing materials is measure in durometers. Its a measure of softness and hardness.


The fact that you need pliers to pull the rubber fan screw through the fan holes should tell you something about their hardness. Softer more noise absorbing materials can be pulled through with your fingers. smile.gif


Those hard rubber fan screws/ fan plugs are basically the same durometer as the CaseLabs hard rubber feet that arrive with your order, maybe slightly softer just to give some relative idea.


It just depends on the weight overall mass of your fans, your normal working rpms, and your sensitivity to noise, whether you want to spend more on the Nexus pure silicon grommets or less on the hard rubber fan screws.


My builds are both work rigs so silence inaudibility is important, but if noise is not an issue, you can use radiator metal screws or metal fan screws that are even less expensive. No one can decide what's best for your build except you, we can only throw out options for you. thumb.gif


https://www.smooth-on.com/page/durometer-shore-hardness-scale/


durometerchart_zps0sjijszm.png

.
Edited by iBruce - 2/12/17 at 11:59am
     
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post #6 of 8
I wouldn't describe these as "hard rubber", they are pretty flexible as far as I can tell and the stretch pretty well.

The reason for using pliers is not because they are hard to pull by hand but that the stems are not long enough to even have room to do it by hand on the fan side of them. There just isn't room to get my fat fingers in there.
    
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post #7 of 8
I'm so glad I'm done in this forum.

Hooray! smile.gif
     
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post #8 of 8
For what is worth, if people are suggesting alternative mounting solutions for anti-vibration, Noctua also makes them - http://noctua.at/en/products/accessories/na-sav2 . These are also available in 5 different CHROMAX line colors - http://noctua.at/en/products/product-line-chromax . I personally bought a kit of the white colored ones to go along with white edge cushions (which will be used on a Noctua IPPC 140mm, 2000rpm 24v--at-12v to be the rear exhaust of my Mercury S8's main chamber) and they seem to be softer and stretchable by hand without any trouble. Here's a review from Overclockers that confirms they are silicone, sourced from the announcement press release, as well as an overall review of the product itself - http://www.overclockers.com/noctua-24-volt-fans-and-chromax-review/

This is actually the first set of anti vibration fan mounts of this sort I've picked up so I can't compare to the others mentioned here, but at least in basic tests they do seem to avoid transferring rotational vibration and noise. As it seems that Noctua tends to be pretty well regarded, if any others seem to be not working for you, and you can't get easily ahold of those iBruce suggests. I am unsure the composition of the Noctua maybe its worth giving these a try as they come from a good brand and may be easy to find at computing specialty shops as well as Amazon and the like.

Oh, for Amazon Prime members, they are sold as "add-on' items inexpensively, so buy them when you pick up something else!
Edited by Xaeos - 2/12/17 at 4:48pm
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