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What bearing for top mount exhaust fan

post #1 of 10
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I know I've seen this info somewhere in OCN, but you know how it goes, can't ever find it when you need it. Question is (now after ordering), is there any problem mounting a Scythe Slip Stream Kaze Maru2 140 as a top mount exhaust even thou it has a Sleeve Bearing? http://www.newegg.com/Product/Produc...82E16835185157

By the way I just received an Auto Notice from Newegg that GT AP-15's are in stock finally, that's why I was rushing when ordering lol.
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post #2 of 10
Should be okay, this is all I've managed to find;

Quote:
Sleeve bearing fans use two surfaces lubricated with oil or grease as a friction contact. Sleeve bearings are less durable as the contact surfaces can become rough and/or the lubricant dry up, eventually leading to failure. Sleeve bearings may be more likely to fail at higher temperatures, and may perform poorly when mounted in any orientation other than vertical. The lifespan of a sleeve bearing fan may be around 40,000 hours at 50 °C. Fans that use sleeve bearings are generally cheaper than fans that use ball bearings, and are quieter at lower speeds early in their life, but can grow considerably noisier as they age.[3]
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post #3 of 10
Sleeve bearing fans tend to underperform and fail quicker when mounted in any other fashion than vertical. I suspect that Scythe fan will work but is prone to a quicker death if you mount it horizontally.

Why not use a ball-bearing fan? Such as the Gentle Typhoon AP-14? Quiet, moves a goodly amount of air, and will do great in any mounting position.
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post #4 of 10
Ball/Hydrodynamic/Hydraulic.

Definitely not sleeve bearing.
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post #5 of 10
Thread Starter 
Quote:
Originally Posted by Siegfried262 View Post
Sleeve bearing fans tend to underperform and fail quicker when mounted in any other fashion than vertical. I suspect that Scythe fan will work but is prone to a quicker death if you mount it horizontally.

Why not use a ball-bearing fan? Such as the Gentle Typhoon AP-14? Quiet, moves a goodly amount of air, and will do great in any mounting position.
I have GT AP-15 ordered as well, but using that to replace my current front fan, plus the top mount exhaust is a 140mm and didn't want to drop another $20.00+ till after I figure out if I'll be going to a Rasa 240/360 WC setup which on my case (NZXT M59) has a external dual radiator capability just waiting to be occupied. Only looking for a temporary solution that wouldn't be making clicking noise or something right away from being in horizontal position. I've seen a thread in here which mentioned something to this affect but can't seem to find it. I already know sleeve bearings are cheap, just can't remember if their noisey when mounted this way.
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post #6 of 10
Sleeve bearing fans sometimes spin slower when made to blow vertically. They also experience shorter life.

It will work though.
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post #7 of 10
Any kind except sleeve for a case top or bottom mount, and any kind (including sleeve) for sides, front and back. It's pretty simple. If it's going to be running parallel to the floor, avoid sleeve bearings, they fail too much in that orientation.
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post #8 of 10
if R4s r sleeve bearings ( i think they are) ive had mine horizontal for a bit over a year now, they still run fine
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post #9 of 10
R4s are sealed permanently, that helps. I've had a horrible time with scythe sleeve bearing fans. Everyone one of them has had the slicker bulge and crap leak everywhere. A good sleeve fan should be sealed better or sealed permanently.
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post #10 of 10
I have a Scythe Kaze Maru on top of my NZXT Beta Evo . . . as intake. When I hold this fan with its output pointed up, it struggles. In any case, unless I recommend top intake:

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