Creating M19x2 custom threads on a nut

[Anonymous]

I'm looking to create a nut with a custom thread M19x2 (metric m19 thread with a pitch of 2). I've looked on the thread list for metric and only see M18 and M20. I've also looked at the possibility of adding it manually via the xml file but it seems they all have custom values for each thread size. I don't have these values, what is the proper way to approach making custom threads?

Thank you for your help.

[Anonymous]

I'm currently trying this in %localappdata%\Autodesk\webdeploy\Production\<version ID>\Fusion\Server\Fusion\Configuration\ThreadData

Hopefully it works

    <Designation>
      <ThreadDesignation>M19x2</ThreadDesignation>
      <CTD>M19x2</CTD>
      <Pitch>2.0</Pitch>
      <Thread>
        <Gender>external</Gender>
        <Class>6g</Class>
        <MajorDia>18.822</MajorDia>
        <PitchDia>17.583</PitchDia>
        <MinorDia>16.5339</MinorDia>
      </Thread>
      <Thread>
        <Gender>internal</Gender>
        <Class>6H</Class>
        <MajorDia>19.2503</MajorDia>
        <PitchDia>17.807</PitchDia>
        <MinorDia>17.0224</MinorDia>
        <TapDrill>17.0</TapDrill>
      </Thread>
      <Thread>
        <Gender>external</Gender>
        <Class>4g6g</Class>
        <MajorDia>18.822</MajorDia>
        <PitchDia>17.6127</PitchDia>
        <MinorDia>16.5636</MinorDia>
      </Thread>
    </Designation>

[jonathanUGLA3]

Hi, 
I'm not an expert on this, (I'm just now trying to create a custom thread using the XML file myself), but you may want to check out the wikipedia articles on thread standards. They have formulas for finding what the inner and out thread diameters should be based on the pitch etc.

[mjaddison]

I know this is an old thread but thought other searchers may be looking for the same thing even now,

this site will calculate the values

https://www.amesweb.info/Screws/IsoMetricScrewThread.aspx

[marcorev]

Hi,

I am having to do the same thing. A M19x2 Internal thread for a Dremel adapter. Did your numbers work fine?

I am looking at the calculator website that someone posted https://www.amesweb.info/Screws/IsoMetricScrewThread.aspx

and your numbers for the external thread match with the average of the numbers  calculated there as average values.

For example: for Major Diameter you use 18.822 the website gives MaxMajor diameter 18.962  and Min Major diameter 18.682 the average is exactly 18.822.

This applies to all the numbers for the external thread.

However for the internal Thread (the one I need) I cannot get the numbers of the Major Diameter match with yours.

In your settings you use 19.2503. How did you calculate this number? the website doesn't provide a Max Major Diameter value but only the Minimum  that is 19.000

The remaining number (pitch and Min Diameter) are again the average of the number provided by the website.

Any help is appreciated.

Thanks

Marco

[MRWakefield]

I believe the thread on the nose of a Dremel tool is 3/4"-12 UN and is one that's included with Fusion.

[marcorev]

Thanks, 

comparing the dimensions between M19x2 and 3/4-12 UN they are pretty close. 

Diameter 19 vs 19.05, Pitch 2 vs 2.117. Probably it is close enough for work given the low tolerance of the Dremel's nose

I will give it a try.

cheers

Marco

[gavin.landon]

I've modified the xml, restarted, it still never shows up in the list.    Maybe something changed.   I only set M19x2.5.

<ThreadSize>
  <Size>19.0</Size>
  <Designation>
    <ThreadDesignation>M19x2.5</ThreadDesignation>
    <CTD>M19x2.5</CTD>
    <Pitch>2.5</Pitch>
    <Thread>
      <Gender>external</Gender>
      <Class>6g</Class>
      <MajorDia>18.7905</MajorDia>
      <PitchDia>17.249</PitchDia>
      <MinorDia>16.938</MinorDia>
    </Thread>
    <Thread>
      <Gender>internal</Gender>
      <Class>6H</Class>
      <MajorDia>19.2925</MajorDia>
      <PitchDia>17.488</PitchDia>
      <MinorDia>16.519</MinorDia>
      <TapDrill>16.5</TapDrill>
    </Thread>
    <Thread>
      <Gender>external</Gender>
      <Class>4g6g</Class>
      <MajorDia>18.7905</MajorDia>
      <PitchDia>17.281</PitchDia>
      <MinorDia>15.97</MinorDia>
    </Thread>
  </Designation>
</ThreadSize>

[gavin.landon]

Nevermind, found my issue.   I was added to the existing..  Instead of creating a custom.  Looks like Fusion might have checks in place to ignore additions to existing files.

[Billyhall1]

did this work in the end?

[elons1940]

I have make work but you have to add the name at the top

<?xml version="1.0" encoding="UTF-8"?>
<ThreadType>
  <Name>Test_french</Name>
  <CustomName>Test_french</CustomName>
  <Unit>mm</Unit>
  <Angle>60</Angle>
  <SortOrder>3</SortOrder>
  <ThreadSize>
    <Name>CustomACME</Name>
    <Size>19.0</Size>
    <Designation>
      <ThreadDesignation>M19x2.5</ThreadDesignation>
      <CTD>M19x2.5</CTD>
      <Pitch>2.5</Pitch>
      <Thread>
        <Gender>external</Gender>
        <Class>6g</Class>
        <MajorDia>18.7905</MajorDia>
        <PitchDia>17.249</PitchDia>
        <MinorDia>16.938</MinorDia>
      </Thread>
      <Thread>
        <Gender>internal</Gender>
        <Class>6H</Class>
        <MajorDia>19.2925</MajorDia>
        <PitchDia>17.488</PitchDia>
        <MinorDia>16.519</MinorDia>
        <TapDrill>16.5</TapDrill>
      </Thread>
      <Thread>
        <Gender>external</Gender>
        <Class>4g6g</Class>
        <MajorDia>18.7905</MajorDia>
        <PitchDia>17.281</PitchDia>
        <MinorDia>15.97</MinorDia>
      </Thread>
    </Designation>
  </ThreadSize>
</ThreadType>

I hope it will help somebody 😊

[Drewpan]

Hi,

Just wondering why you need custom threads? Is it a design exercise or some other reason?

Only asking because Standards are there for a reason. If you design a custom thread then you have to

actually hand make the fasteners, or specially machine as the case may be.

I get that there is nothing actually wrong with custom threads and that some manufacturers deliberately

use them for proprietary purposes. I am learning to be a design engineer so off the shelf is much cheaper than

custom designed parts. I would only use a custom fastener if I really had to and couldn't either redesign

my part to use the larger standard part or the smaller one did not have the required safety factor.

As Andrew S. Tanenbaum says - "when it comes to Standards, there are plenty to choose from", so why create

even more.

Cheers

Andrew

[marcorev]

It was for a nut to fit a dremel. So you should ask Dremel why they didn’t use off the shelf standard 😀

eventually I used a 3/4-12 UN  as it is pretty close and with plastic 3d printing is good enough. 

cheers

Marco

[Drewpan]

Ok,

So Dremel using them for proprietary reasons. 🙂

Cheers

[riegler268]

Hallo,
Unter: "C:\Users\"DeinName"\AppData\Local\Autodesk\webdeploy\production\xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\Fusion\Server\Fusion\Configuration\ThreadData" findest du einen Ordner mit der Datei "ISOMetricprofile.xml" diese kannst du mit Editor einfach bearbeiten füge dafür den Codeabschnitt mit M19.2 hinzu nach dem neu Laden bekommst du das neue Profil.
Code: 
<Designation>
<ThreadDesignation>M19x2</ThreadDesignation>
<CTD>M19x2</CTD>
<Pitch>2</Pitch>
<Thread>
<Gender>external</Gender>
<Class>6g</Class>
<MajorDia>18.917</MajorDia>
<PitchDia>17.917</PitchDia>
<MinorDia>16.835</MinorDia>
</Thread>
<Thread>
<Gender>internal</Gender>
<Class>6H</Class>
<MajorDia>19.000</MajorDia>
<PitchDia>18.083</PitchDia>
<MinorDia>17.376</MinorDia>
<TapDrill>17.4</TapDrill>
</Thread>
<Thread>
<Gender>external</Gender>
<Class>4g6g</Class>
<MajorDia>18.917</MajorDia>
<PitchDia>17.937</PitchDia>
<MinorDia>16.855</MinorDia>
</Thread>
</Designation>

Viel Spass

[MRWakefield]

Apologies — I don’t speak German, so I’ve used a translator. I hope I’m understanding you correctly.

It seems you’re suggesting editing the "ISOMetricprofile.xml" file to add the M19x2 thread. I wouldn’t recommend this approach, as any changes to this file will be lost the next time Fusion is updated — the installer will overwrite it. That’s why it’s best to create separate custom thread files, which aren’t replaced during updates.

However, there’s one more thing to be aware of: when Fusion updates, it often changes the storage location for thread files and won’t automatically copy your custom ones to the new folder. To avoid losing them, I recommend using the ThreadKeeper add-in, which automatically copies your custom thread files to the correct location after each update.

Hope this helps.