>Adding to Rich's comment, fans/blowers using ball race bearings are
>appreciably
>noisier than those using straight sleeve bearings, especially, in my
>experience,
>when they get old. I gather they have a longer life, which is attractive in
>those circumstances where the noise isn't a problem.
>
>If you like lathe work, then you can turn up suitable phosphor-bronze bearing
>sleeves, with lubrication points, to modify the fan/blower............on the
>other hand, you might just prefer operating! (I turned up the sleeves because
>the blower was free, and I'm mean!)
>
>Anybody know about the noise producing proclivities of needle bearings? I
>suspect they're little better than ball races
>
Matsushita Electric is switching over to ''surface-wave'' bearings.
Life is about 5x that of ball bearings and they are virtually silent.
>
cheers, Peter
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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