Sleeve bearings (technically not bearings IIRC; they're just a bush) get worn through pretty quickly. I'm not sure exactly how long they last, but I'd avoid them.
Sleeve bearings (technically not bearings IIRC; they're just a bush) get worn through pretty quickly. I'm not sure exactly how long they last, but I'd avoid them.
No, they're just noisier and tend to have shorter lifespans than other types. If you want a quiet and long lasting fan you should consider fluid dynamic bearings.