47+ Rifle Bearing Fan Orientation Pictures. Usually there is more motor noise as a tradeoff. This is in contrast to the sleeve bearing fans, which are seriously affected when they are mounted horizontally, as is typically the case with psus.
After a few months, if you are unlucky, they can get a bit noisy. Sleeve bearing fan designs are inexpensive, rugged and simple, which has led to their widespread use in many applications. Leads, fan dba 71, bearings ball, fan dia.
After a few months, if you are unlucky, they can get a bit noisy.
Though generally more expensive, ball bearing fans do not suffer the same orientation limitations as sleeve bearing fans, are more durable especially at higher temperatures, and quieter than sleeve bearing fans at higher rotation speeds. Just out of curiosity, how common are bearing failures on modern fans? Fan orientation isn't too much of an issue either these days, and while temperature is definitely an issue, most enthusiasts change out fans often enough (every couple years) that fan lifetime ultimately is not an issue except in shock/vibration/dust sensitive environments. Dual ball last forever in any orientation and generate a lot of pressure.