> According to Rick at Maxant,  his extractors max out at approximately
> 300 rpm (+ -).  He also said that some of his more expensive extractors
> can reach 500 rpm but that speed is not needed.
 
My physics can't handle this, but strictly speaking, it may not be
the RPM you need (or at least not only).  The other factor relates to
the radius, the distance from the extractor's centre to the frame.
Speed of radial acceleration, or something like that?  In practical
terms, the larger the extractor's container, the better: if you spin
a frames in a small diameter at the same number of RPM they will tear
apart...
 
 
  (\           Nick Wallingford
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