Measuring threads with 3 wires
Close
Login to Your Account
Results 1 to 10 of 10
  1. #1
    Join Date
    May 2010
    Country
    DENMARK
    Posts
    3,721
    Post Thanks / Like
    Likes (Given)
    4080
    Likes (Received)
    12731

    Default Measuring threads with 3 wires

    There are many that use the 3 wire method for measuring external thread pitch diameter. Many seem to make it more complicated than I think it can be. One of the reasons it’s a PITA is that most micrometers have a rotating spindle. If done at the machine make sure you have something to catch a dropped wire.

    This is how I decided to do it long, long ago.

    Place 2 wires on the top of the thread and hold them in place by resting the micrometer spindle on the 2 wires. That the micrometer spindle rotates becomes insignificant. Close the micrometer by pulling up the micrometer anvil until the 1 wire can be slid between the thread and the micrometer anvil. You turn the micrometer spindle until the single wire and the two wires are held in position and you have a measurement.

    When the micrometer is “closed” you have the measurement result. After you’ve done it this way a few times you’ll probably never do it any other way. It applies to both three single thread wires and the type that “clip” onto the micrometer spindle and anvil.

    One hand is holding the micrometer that is keeping the two wires down and your other hand is for the single wire.

  2. Likes J Gilles liked this post
  3. #2
    Join Date
    Oct 2007
    Country
    SPAIN
    Posts
    3,938
    Post Thanks / Like
    Likes (Given)
    2296
    Likes (Received)
    1549

    Default

    I was always taught Plasticine is your friend.
    2x wires held together and have them on the fixed anvil under the part and pressure "up" the mic which also holds the them in place.
    Then either slide the top wire in by hand and wind the spindle down, or have all 3x wires in Plasticine and do it like this
    #16
    Three Wire Thread Measurement

  4. #3
    Join Date
    Dec 2004
    Location
    San Antonio, Texas
    Posts
    180
    Post Thanks / Like
    Likes (Given)
    15
    Likes (Received)
    216

    Default

    I had a small foam block that I would stick the wire ends in.

  5. Likes atomarc liked this post
  6. #4
    Join Date
    May 2010
    Country
    DENMARK
    Posts
    3,721
    Post Thanks / Like
    Likes (Given)
    4080
    Likes (Received)
    12731

    Default

    Has anyone tried the method I suggested? It is both easy and fast.

  7. #5
    Join Date
    Sep 2006
    Location
    Stillwater, Oklahoma
    Posts
    1,482
    Post Thanks / Like
    Likes (Given)
    110
    Likes (Received)
    814

    Default

    Quote Originally Posted by Gordon B. Clarke View Post
    Has anyone tried the method I suggested? It is both easy and fast.

    Yeah, I do it all the time. But I still clear the chip tray just in case.

  8. Likes Red James, Gordon B. Clarke liked this post
  9. #6
    Join Date
    Sep 2011
    Location
    Posts
    1,793
    Post Thanks / Like
    Likes (Given)
    103
    Likes (Received)
    73

    Default

    Quote Originally Posted by Gordon B. Clarke View Post
    Has anyone tried the method I suggested? It is both easy and fast.
    No I haven't,I prefer Barbters method.

  10. #7
    Join Date
    May 2010
    Country
    DENMARK
    Posts
    3,721
    Post Thanks / Like
    Likes (Given)
    4080
    Likes (Received)
    12731

    Default

    Quote Originally Posted by camscan View Post
    No I haven't,I prefer Barbters method.
    "Prefer" is when you try alternatives. I'm not sure if you're being stupid or provocative or stupidly provocative.

    I doubt if you've ever made a thread much less measured one.

  11. #8
    Join Date
    Oct 2007
    Country
    SPAIN
    Posts
    3,938
    Post Thanks / Like
    Likes (Given)
    2296
    Likes (Received)
    1549

    Default

    Quote Originally Posted by Gordon B. Clarke View Post
    "Prefer" is when you try alternatives. I'm not sure if you're being stupid or provocative or stupidly provocative.

    I doubt if you've ever made a thread much less measured one.
    Ohhh, so I wasn't imagining things - you had deleted it but because I called you on it, you un-deleted it LoL

    Gotta get your "I think I'm superior" 2nd line dig-in haven't you?
    I SMH...

  12. #9
    Join Date
    Sep 2011
    Location
    Posts
    1,793
    Post Thanks / Like
    Likes (Given)
    103
    Likes (Received)
    73

    Default

    Quote Originally Posted by Gordon B. Clarke View Post
    "Prefer" is when you try alternatives. I'm not sure if you're being stupid or provocative or stupidly provocative.

    I doubt if you've ever made a thread much less measured one.
    What makes you think that I haven't tried alternatives? You doubt if I have ever made(I bet you mean cut) a thread,I doubt if you have ever made a friend.

  13. Likes Trueturning liked this post
  14. #10
    Join Date
    Oct 2007
    Country
    SPAIN
    Posts
    3,938
    Post Thanks / Like
    Likes (Given)
    2296
    Likes (Received)
    1549

    Default

    Quote Originally Posted by camscan View Post
    What makes you think that I haven't tried alternatives? You doubt if I have ever made(I bet you mean cut) a thread,I doubt if you have ever made a friend.
    Thread rolling.
    Hmmmm...."Formed" is a better name but could that be called "make"?
    Asking for a friend.
    (No, not that friend but another..)


Tags for this Thread

Bookmarks

Posting Permissions

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