Thread pitch sizes no longer avaliable?

[jp3JQAA]

Hi there!

A couple a years ago (June 2019) i designed a adapter ring with a M40x1 6H pitch.

Now i need to design a new product, with a M40x1 pitch, which should be fine, at least i thought so.

In the thread drop down were you set diameter, 40mm is selectable, but not M40x1, smallest is M40x1.5.

Why is this?; same goes for M26, but with only 1 option, pitch 1.5. So, when creating the drawing, and i want to state the thread and pitch, i don´t get the accurate dimensions and sizes, because the thread function ADDS the chosen diameter to the part (3d model), even when exporting to a step file.

So, anyone who might have a clue why some pitches got removed?

Finally, don´t suggest to me how to create my own what ever i want pitch by using coil and sweep. That i do when design polymer/plastic products for molding. The whole point of the function is to get the representation on the 2d drawing and accurate dimensions for the 3D model, where the pitch is used.

[HughesTooling · Accepted solution]

Looking at your history, the last time you made a custom thread XML file. See this thread. In reply to my post in that thread you said you'd made a backup of the file, hope you still have it.

Mark

[jp3JQAA]

Hi!

Thanks for reminding me.....me bad. After producing more than 8 new products with all including parts and drawings, since june -19, with "normal" thread sizes, i got the request to design a variation of the i did back then, with M40x1....and of cause forgot how it was done. 

So, with that said, here is a nice thread calculator i find very helpful.

https://amesweb.info/Screws/metric-thread-dimensions-calculator.aspx

Thanks

JP

[zsigmonderdelyi]

So what's the solution?

[HughesTooling]

@zsigmonderdelyi  There's a nice add in in this thread that creates custom XML thread files.

https://forums.autodesk.com/t5/fusion-360-design-validate/fusion-360-custom-thread-utility/m-p/11722...

Mark

[jp3JQAA]

Hi!

So, this is what i do when i come up with threads, that are standard nor listed in Fusion 360

C:\Users\your_username\AppData\Local\Autodesk\webdeploy\production\(latest_release)540c9578410bc15ff261605667cfced82aa9ac6d\Fusion\Server\Fusion\Configuration\ThreadData

Copy and save as the file you want to modify, (example "ISOMetriprofile_M6x0_4")

Open the file in notepad, choose data of a close size (example M6x0.5), copy and paste it in a new row (example below). Then modify the data, to be correct for a M6x0.4 pitch, and save.

Finally, copy/save the original TDF, before swapping the files in thread data folder,  just in case , then paste the modified file, and rename to original name. 

You might success the first time, i know i did not...and had to change the data/names/tabs/row break etc. in the file a couple of times, before i got it to work. A hint. Every time there is an update, you need to replace the file, if you want to reuse your special thread. A good thing is to save it, where you also can add new crazy threads....

Good luck!

JP

[HughesTooling]

@jp3JQAA Have a look at the link I posted above, someone's done a nice job creating an add-in to create pretty much any metric thread. Also you might want to look at the ThreadKeeper add-in, it moves your custom thread files for you when there's an update.

Mark

[jp3JQAA]

Thanks, i saw that @HugesTooling. When i´ve got the time i will look in to that...
Cheers
JP