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Time to make some threads

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ChrisJ
ChrisJ Member Posts: 17,067
in THE MAIN WALL
Due to issues with burrs on the last units we made I'm going to be milling some female 1/8" NPT threads in 316SS soon.

The things I like about thread milling is if a break the threadmill off it simply falls out of the hole.  I can also adjust it so my threads fit a specific part perfectly with little to no slop.  When done right and compared I feel it makes tapped threads feel pretty terrible.


This will be my first time doing NPT threads with one.




Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

Comments

  • mattmia2
    mattmia2 Member Posts: 15,564
    So does the part need to rotate and move up and down the pitch of the thread as it rotates?
  • ChrisJ
    ChrisJ Member Posts: 17,067
    mattmia2 said:
    So does the part need to rotate and move up and down the pitch of the thread as it rotates?
    On my machine the part moves in X and Y and the tool spins and moves in Z (vertical).

    I'm going to try and take a video of it in the next few days.

    I've done a lot of normal threads but this will be my first time milling npt threads

    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

  • ratio
    ratio Member Posts: 4,176
    ChrisJ said:

    On my machine the part moves in X and Y and the tool spins and moves in Z (vertical).

    I'm going to try and take a video of it in the next few days.

    I've done a lot of normal threads but this will be my first time milling npt threads
    Does that mean that the tool rotates around the work, or am I misunderstanding?
  • ChrisJ
    ChrisJ Member Posts: 17,067
    ratio said:
    On my machine the part moves in X and Y and the tool spins and moves in Z (vertical).

    I'm going to try and take a video of it in the next few days.

    I've done a lot of normal threads but this will be my first time milling npt threads
    Does that mean that the tool rotates around the work, or am I misunderstanding?
    The tool spins like a drill bit and moves up and down and the part  moves around horizontally.

    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

  • ChrisJ
    ChrisJ Member Posts: 17,067
    This video shows how it works.

    https://youtu.be/rDnavOlGcdc

    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

    CanuckerSolid_Fuel_Man
  • ratio
    ratio Member Posts: 4,176
    That's awesome. Do you use it to make male threads too?
  • ChrisJ
    ChrisJ Member Posts: 17,067
    ratio said:
    That's awesome. Do you use it to make male threads too?
    Yessir.

    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

  • hot_rod
    hot_rod Member Posts: 26,575
    great animation!
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • mattmia2
    mattmia2 Member Posts: 15,564
    without a cnc mill you would need a mill that was pretty much just built for thread cutting.
    CLamb
  • Lard
    Lard Member Posts: 115
    I have been using a high-performance two-flute PCD (diamond) threadmill at work.  M24x1.25 inside threads in aluminum in about one second.  18,000 RPM and .3mm/rev (automotive left the inch system long long ago) Up to this point all I have used is been plain ‘ol Emuge carbide.

    Love the remark about how a broken threadmill just falls out. The threads are still usually junk, but broken taps=sadness.  Broken spindles = even more sadness.  G0 does not a G1 make.
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 11,562
    I really enjoyed reading this THREAD! or is this a POST? maybe a discussion?

    I'll call it a Thread, mainly for the content

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

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