+ / - Draft

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • + / - Draft

    I can't remember if +dft means to measure at the largest end and -dft means to measure at the smallest end??
    I used to be high on life but I built up a tolerance.

    Brown & Sharpe Global Advantage
    PCDMIS CAD++ v2011mr2
    PH10MQ/SP600M


    sigpic

  • #2
    I always measure a boss at the smallest point + draft
    print diameters are at the smallest usually + draft

    if its a hole its at the bottom with + draft upwards
    sigpiccall me "Plum Crazy"....but you only go around once!

    Comment


    • #3
      Plus draft means material is added to achieve draft. A demension measured +draft is taken farthest from the parting line - @ least material condition. (Smallest boss, largest hole.)
      v2013 MR1, v2015.1
      B&S Global 544, 555
      Mitutoyo A504 w/PC-DMIS

      sigpic
      Since 1994

      Never force anything. Get a bigger hammer.
      (Advice from my dad.)

      Comment


      • #4
        So...

        + draft in a hole means the dimension gets bigger towards the other end.
        - draft in a hole means the dimension gets smaller towards the other end.

        And...

        + draft on a stud means the dimension gets bigger towards the other end.
        - draft on a stud means the dimension gets smaller towards the other end.
        I used to be high on life but I built up a tolerance.

        Brown & Sharpe Global Advantage
        PCDMIS CAD++ v2011mr2
        PH10MQ/SP600M


        sigpic

        Comment


        • #5
          To restate:

          Plus draft adds material as you move toward the parting line.
          Minus draft removes material as you move away from the parting line.

          Minus draft measurements are made closest to the P/L, plus draft are farthest from P/L.
          v2013 MR1, v2015.1
          B&S Global 544, 555
          Mitutoyo A504 w/PC-DMIS

          sigpic
          Since 1994

          Never force anything. Get a bigger hammer.
          (Advice from my dad.)

          Comment

          Related Topics

          Collapse

          Working...
          X