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Title: Despite Amazon's description this is NOT a "ball bearing" fan
Review: Bearing Type: BallNo, this is just a sleeve bearing fan. Contact the manufacturer and ask them. In fact it is printed right on the box! "SLEEVE BEARING". The problem is that I purchased this fan specifically to be mounted in a horizontal position. So what is the big deal you ask? Sleeve bearing fans are not designed to be run horizontally! They will quickly wear out and get noisy if mounted horizontally. Use your favorite search engine to look up the details. Basically ball bearing fans last longer and can be mounted horizontally without any problem.I learned this the hard way by mounting sleeve bearing fans horizontally. They would become loud and die prematurely even though the same brand fan was mounted vertically in the same case and was still running just fine.However this is an excellent sleeve bearing fan and will work just fine in the vertical position which it was designed for.
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