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Farm Machinery
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Rebalancing a largish fan rotor?
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<blockquote data-quote="DanniAgro" data-source="post: 8052172" data-attributes="member: 71394"><p>Just refitting the fan in its housing after getting it balanced by the experts.</p><p>I tried the plasticine method and got what seemed to be a good balance. However when it was randomly spun by hand, it seemed to be still avoiding stopping in some areas after 30 or 40 spins, so obviously needed more balancing than I was capable of.</p><p>Ringing Hereford Rewinds revealed that they would do the job for £75, taking about two hours, so I took the fan into them (it was still not installed on the motor permanently) and got it back the next day. They'd welded five pieces of plate of differing sizes onto very different places plus two areas of weld for smaller weight. It makes me wonder how well balanced it was originally, as a lot of the added weight didn't seem to be related to the bad scaling caused by leaving it outside.</p><p>So all you wise guys who said I should get it done professionally were quite right, it was just the price I was worried about, but it was very reasonable after all.</p></blockquote><p></p>
[QUOTE="DanniAgro, post: 8052172, member: 71394"] Just refitting the fan in its housing after getting it balanced by the experts. I tried the plasticine method and got what seemed to be a good balance. However when it was randomly spun by hand, it seemed to be still avoiding stopping in some areas after 30 or 40 spins, so obviously needed more balancing than I was capable of. Ringing Hereford Rewinds revealed that they would do the job for £75, taking about two hours, so I took the fan into them (it was still not installed on the motor permanently) and got it back the next day. They'd welded five pieces of plate of differing sizes onto very different places plus two areas of weld for smaller weight. It makes me wonder how well balanced it was originally, as a lot of the added weight didn't seem to be related to the bad scaling caused by leaving it outside. So all you wise guys who said I should get it done professionally were quite right, it was just the price I was worried about, but it was very reasonable after all. [/QUOTE]
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Rebalancing a largish fan rotor?
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