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  1. lsmaclea

    Flat cut on end of extrusion

    I'm making a part out of a round flouropolymer extrusion. Both ends need to be trimmed to a flat end, or trimmed perpendicularly to the axis of the extrusion. I've attached the drawing here. The drawing shows that the end of the part is cut at an even 90 degrees to the axis (Datum A). My...
  2. lsmaclea

    Circularity of a medium quality extrusion

    Interesting. So, if I move my datum target to the ID of my part, then my total runout is valid. Does that make the inspection any more complicated than putting the part in a lathe and figuring out what the total swing of an indicator is as the part turns? I don't have to do anything like...
  3. lsmaclea

    Circularity of a medium quality extrusion

    Ok, great stuff so far. I'm not sure I understand why my Runout is improperly located. I've been working from this site for my runout specifications. http://www.tec-ease.com/tips/march-00.htm Do I have to actually put my Runout tolerance near the part diameter callout, even though they...
  4. lsmaclea

    Circularity of a medium quality extrusion

    The part in question is a simple tube. I've attached a picture of the dimensioning scheme I have going so far. I want to keep this part simple and cheap. The problem that the part is made from an extrusion of nylon 6. The machine shops that manufacturing has talked to so far want to shear...

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