Reduce the vibrations efficiently & silent operation
Air-inlet with optimal aero-dynamical design reducing noisy air turbulences
We defined HDB to Hydro Dynamic Bearing. An oil seal design that has a higher reliability and advantage than conventional fan motor design. 1. High revolution precision, low vibration noise 2. Fluid seal design provide extremely long life span 3. Surface tension effect, runs more smoothly with no friction, extremely quiet Fluid seal design is achieved through the use of oil surface tension and hydrodynamic pumping forces provided by grooves. Bend area is centralized oil and prevented oil leakage out of motor (oil leakage is main problem of sleeve bearing, short life time) . Friction between shaft and HDB will be down due to herringbone structure reaction(friction between the metal is disadvantage of ball bearing, noise & waste heat problem). So HDB conquer sleeve & ball bearing disadvantage to become more reliable & quiet technology for Top-notch fan. Such design concept is successful and applicative on HDD, and we can see a reliability application in it.
HDB, Ball, & Sleeve comparison
life span (hrs)
HDB Design Principles
Oil surface tension and hydrodynamic pumping forces provided by grooves, no friction, extremely quiet
- by David_W @Mar 05, 2012
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Picked up a couple of these for my 240mm rad. The focused air flow certainly has an impact on performance. Will likely grab another 2 down the road. I've no experience with Noctua fans, but these at almost $10.00 less offer great performance on a budget.
I bought a couple of these for use as case fans because I needed fans that could move a lot of air but remain quiet while doing so. These fans do not disappoint. I would go so far as to call them "extremely" quiet even at full speed... yes, they do make noise, but no noticeable drone like some other fans.
I have used other tool-less fans before, and had no problem with them, so I assumed that these would be easy. After spending about half an hour fumbling with these one, I assumed that I must be doing something wrong. After spending some time googling, I found that I am not the only one having trouble. In the end, I had to use my trusty needle-nose pliers to finally get them through the holes in the fan. There is no way I would have been able to grip hard enough with just my fingers.
I still highly recommend this fan, just don't expect to have an easy time with the rubber pins
Ce ventilateur est très efficace et déplace un assez bon volume d'air. Les coussinets en caoutchouc aident à éliminer la vibration. Le câble tressé est de bonne qualité de même que tout les accessoires inclus. On bon achat.
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