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21 May 2012

Impellers – why underfile?

Underfiling is the removal of material from the underside (also back side, “non-working” side, or suction side) of an impeller vane at the inlet or the exit.  In this article, underfiling will refer to the exit.  The terms “underfiling”, “back-filing”, “S2 cutting”, and “Sv cutting” are equivalent.  There are probably others.  A related term is […]

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