topic UNC 3/8 inch thread in Fusion Design, Validate & Document Forum

UNC 3/8 inch thread

Anonymous — Fri, 02 Oct 2015 13:14:57 GMT

Dear Autodesk community

Im trying to model a part to be used in a tripod. For that a need a 3/8 inch UNC thread. The problem is that I can't find this type of thread in the selection of the standard thread-tool. Attached you see the choices given to me. Maybe the thread norm I need has a different name and is already available to me or do I need a different version of Autodesk?

Any help is appreciated.

Best regards

Dave

Re: UNC 3/8 inch thread

Anonymous — Fri, 02 Oct 2015 14:40:24 GMT

Hi,

UNC are under the ANSI Unified thread types. I think for tripods its the 16 theads per inch type.

Hope that helps!

Niels

Re: UNC 3/8 inch thread

Anonymous — Sat, 03 Oct 2015 11:47:36 GMT

Thanks alot, I didn't know that. That solved my problem

Re: UNC 3/8 inch thread

Anonymous — Tue, 20 Jun 2017 15:52:54 GMT

Hi,

That will help me too. However I got class 1B,2B and 3B. Which is the one I need?

Thanks

Re: UNC 3/8 inch thread

Anonymous — Tue, 20 Jun 2017 16:12:43 GMT

Googled it, thanks!

Re: UNC 3/8 inch thread

greg3SZDC — Tue, 08 Aug 2017 18:43:09 GMT

I'm unable to find this option in my menu. Can you please let me know if there's another library that needs to be loaded? Thanks.

Re: UNC 3/8 inch thread

thekondrat — Mon, 18 Feb 2019 15:35:52 GMT

How do i make a thread for the bicycle pedals? I do not find such in the list - 9 / 16-20?

Re: UNC 3/8 inch thread

Anonymous — Wed, 21 Aug 2019 01:32:04 GMT

Not sure if you still need the bicycle pedal thread size but

It should be ANSI Unified Screw Thread - Size 0.5625

The designation you want, which is 20 UN.

Hope it helps.

As for the classes, here are information to help you choose. In my case, I would just go with trial and error. (If you are using 3d printer, print only the thread to see which class fit is good for you to save time and filament)

https://www.fastenal.com/content/feds/pdf/Article%20-%20Screw%20Threads%20Design.pdf

Re: UNC 3/8 inch thread

Anonymous — Wed, 21 Aug 2019 20:50:17 GMT

If there's ever a thread you need that you can't find in fusion 360, inserting something with the mating thread from McMaster and cutting the profile with it is a good option.

Re: UNC 3/8 inch thread

Spit40 — Sun, 08 Oct 2023 10:21:10 GMT

I had to google as well to find out what class 1b, 2b and 3b are. To save others time I found that it's to do with tolerances. 3B is the tightest fit and 1B is the loosest.