Results 1 to 3 of 3

Thread: Tolerance to centerline allows negative

  1. #1
    Associate Engineer
    Join Date
    Mar 2018
    Location
    Rancho Cordova, CA
    Posts
    2

    Tolerance to centerline allows negative

    Hi, All. Long time reader, first time poster.

    I have a round part with a precision hole along the center axis. The OD has no real functional role but the ID is very important, so datum A is defined by its axis.

    There is a tapped hole in the OD going towards (perpendicular to) the axis. The the thread depth and pilot depth are dimensioned from the axis. For reasons I won't bother explaining, an allowable distance for the pilot hole is .013" short of the axis to .007" past the axis. Can I state .003 .010 with a scale appropriate enough to show which direction the nominal .003 is?

    If this isn't legal, how could one define this tolerance zone? Reminder; The OD is loose in size and runout, so calling a depth from entrance won't work without unnecessarily tightening up the entrance surface (OD).

    Screenshot attached.
    Screenshot 2021-03-07 154545.png

  2. #2
    Principle Engineer
    Join Date
    May 2015
    Posts
    210
    You have specified the functional dimension that you want. Looks fine to me.

  3. #3
    Associate Engineer
    Join Date
    Mar 2018
    Location
    Rancho Cordova, CA
    Posts
    2
    Quote Originally Posted by Hudson View Post
    You have specified the functional dimension that you want. Looks fine to me.
    Thanks, Hudson. I agree, but our checker does not. Thanks for your opinion.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •