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What is UPR (Undulations Per Revolution) in Roundness

Discussion in 'GD&T Standards and Practices - ASME & ISO' started by shankar Jadhav, Oct 17, 2015.

  1. shankar Jadhav

    shankar Jadhav Member

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    Can anybody explain UPR (Undulation per revolution) in roundness and what standard exists for same.
     
  2. Eric Twiname

    Eric Twiname Well-Known Member

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    Howdy shankar,

    Never heard of it before but was curious...and found this: http://digitalmetrology.com/mean-roundness/

    I thought it was pretty informative, though not a "standard". I hope it helps...

    Perhaps others specifically in the metrology field might comment..
     
  3. Emmyd

    Emmyd Member

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