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Quietest 120mm fans for horizontal mounting? - Page 2

post #11 of 15
Quote:
Originally Posted by Indigo340 View Post

Totally agree with that, I was hoping that I was wrong though and someone had managed to come up with a solution to this issue. It really only needs a tiny washer between the C clip and the housing, it would need to be made of a soft material like brass or nylon that doesn't require lubricant but nobody seems to do it. It's been a few years since I last sourced new parts for a build so am finding new stuff all the time that solves many issues but this one is still to be solved. In the short term, I will use the quietest fans I can find but would love to find a long term solution.

I have just fitted a Be Quiet H/S and fan which is blowing air up so I expect that it will need replacing in the not too distant future, when it starts to become audible I will probably turn it over so that it blows down to see if I can get a bit more life from it wink.gif

Thanks for the input thumb.gif

the problem is there are only a few industrial fan manufactures in the world. (most fans we see are relabeled versions of the fans that those manufactures make) unfortunately, this means the primary design of the fan cant change too much since their machines are set up to build fans a certain way. any drastic change to the way a fan blade assembly is attached to the frame of the fan would require major retooling of the production line and they wont do that for such a "small" market. unless manufactures like DELL or someone as large design their own fans and want a few million of them built, the design will stay the way they are... frown.gif it's unfortunate but we are stuck with C clip noise till some other "industry" decide they need "computer industry sized" fans that push air up.
post #12 of 15
Thread Starter 
Or until someone finds an alternative to the sprung steel C clip that can be retro fitted easily. I know a couple of good quality engineering suppliers that might be able to come up with something, I'll look into it. wink.gif
I'm thinking of a tube that slips over the shaft with sprung BB's inside that fit into the groove for the C clip. There is usually a bit of slack in the end float so it might be possible.
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post #13 of 15
Quote:
Originally Posted by Indigo340 View Post

Or until someone finds an alternative to the sprung steel C clip that can be retro fitted easily. I know a couple of good quality engineering suppliers that might be able to come up with something, I'll look into it. wink.gif
I'm thinking of a tube that slips over the shaft with sprung BB's inside that fit into the groove for the C clip. There is usually a bit of slack in the end float so it might be possible.

technically speaking they can use Teflon coated C clips(or make the whole c clip out of teflon based plastic) and coat the central shaft with
Teflon. it will still wear out over time, but it does resolve the issue for a "few years". the problem is it WILL wear out and the problem will return and it will wear out faster if you go up in fan size due to the additional weight.

the only way to resolve the problem is to reverse the blade direction so the air is designed to push up instead of down while still resting on the bearing when mounted horizontally. but till some big manufacture decide they need a fan like that, we are still stuck with current fan design.
post #14 of 15
My Yates get clicky when horizontal. For a bearing I would trust in any position, I would probably look to a Noctua NF-P12 or possibly their new NF-S12A.

Or a frequently oiled Scythe Slipstream.
    
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post #15 of 15
Thread Starter 
I added some light sewing machine oil to a couple of fans and they increased their speed by around 10% !
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