Originally Posted by kev_b
I wonder if the ball bearing fan is any different then the Barometric ball bearing on the new CM Excalibur fan
, I'm still tempted to try one of these fans but somebody on another forum said they are noisy.
Ball bearings always make more noise than sleeves, that's about the only advantage of a sleeve. A sleeve is just a, well a sleeve around a shaft that is lubricated only by air, they burn out quick but can be really high speed and quiet if made right. Dual balls always last the longest because there's one track in the fan and one in the motor. Race bearings are really great for relieving friction but thier problems are, you have to re-pack (with grease) them at regular intervals, if you don't they lock up and blow. Sealed Race bearings will eventually sliver out bits of metal and it's a matter of time before that heats up the grease and they blow.
A Barometric ball bearing would move position as it heats up and expands, I would imagine that makes them more noisy. The best kind of bearing for fans are sealed fluid suspension. You'll find these in most modern furnaces and A/C units and some of the $20- fans that Kev-b posted recently, the ones with the really sweet lights.
This is what I learned from 3 years as a parts clerk in the Motor Pool. If you want the best, longest lasting, quietest, fastest fans you can get, alway buy sealed Fluid suspension. However, the longest most PC builds last is 3-5 years and something better comes along and we all fall in love
and upgrade. So, why not get cheaper and higher cfm or whatever suits our needs?
Oh not to mention, (but I'm going to anyway) when I first put a cpu cooler on it was a set of fins, next it was fins and a tiny fan, next it was a slot cooler (bigger longer fins and bigger fan), now it's a water pump, tubing and a set of two huge fans. So, things get tinier and hotter and our fans get bigger and faster. Oh, Race bearings are the most fun to play with by themselves. The Army is a boring life.
Steve Winwood sang, "come on and just flow with it baby".Edited by BriSleep - 1/24/10 at 7:34pm