Recreating a plastic piece with a 13G thread pitch

Recreating a plastic piece with a 13G thread pitch

LunarHamster
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Recreating a plastic piece with a 13G thread pitch

LunarHamster
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Hello! I am trying to recreate these two broken plastic pieces in Fusion for a 3D printer. The threads match the 13G leaf on my thread gauge. I believe this is a Whitworth scale? I've read through lots of forum posts and watched lots of videos and I am sorry to say I am still at a loss as to what to do with the "13G" in Fusion. If someone could kindly walk me through this I would most appreciative. I've found the Fusion ThreadData folder with XML files...
photo_2024-05-14_10-02-22.jpg

 

photo_2024-05-14_10-02-46.jpg

 

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HughesTooling
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Consultant

A quick Google search seems to point to this being a BSP thread but none of the standard threads have a 13tpi. Are you sure it's not 14tpi?

 

Mark Hughes
Owner, Hughes Tooling
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LunarHamster
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I tried to get some good pictures for you... The 13 G fits much closer.
photo_2024-05-14_10-39-28.jpgphoto_2024-05-14_10-33-54.jpg

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HughesTooling
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Thinking about this a bit more. I guess this could just be a standard whitworth thread, what diameter is the OD of the thread?

@MRWakefield has created a utility to help create thread XML files and has started to collect custom XMLs but not sure he's got any whitworth libraries. The add in is available here, not sure where the custom files are.

 

Mark Hughes
Owner, Hughes Tooling
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HughesTooling
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@LunarHamster wrote:

I tried to get some good pictures for you... The 13 G fits much closer.
photo_2024-05-14_10-39-28.jpg


The thread looks like it's a bit more course than the gauge, don't suppose it 2.0mm?

 

Mark Hughes
Owner, Hughes Tooling
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LunarHamster
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You're right!  2.0 mm fits even better!
photo_2024-05-14_10-58-53.jpg

The OD is 29.82 on one and 31.92 on the other.

 

photo_2024-05-14_11-08-31.jpg

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Message 7 of 9

HughesTooling
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@LunarHamster wrote:

The OD is 29.82 on one and 31.92 on the other.

 

 


Do you mean the ID is 29.82 or is there another part?

 

Well all you need do is create a part the same OD then add a thread then set the pitch. Fusion just expects you to model the part with the OD of the thread (for male or female).

If printing set to modeled threads.

HughesTooling_0-1715712029185.png

 

Mark Hughes
Owner, Hughes Tooling
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Message 8 of 9

LunarHamster
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There are two parts, sorry. This picture was supposed to be in the last post!


photo_2024-05-14_11-06-24.jpg

Thank you so much for your help!

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Message 9 of 9

MRWakefield
Advisor
Advisor

I would have chimed in earlier but I've been out doing the weekly shopping! Anyway, it looks like you're getting there with @HughesTooling's help.

If this answers your question please mark the thread as solved as it can help others find solutions in the future.
Marcus Wakefield


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I've created a Windows application (and now Mac as well) for creating custom thread files for Fusion. You can find out about it here. Hope you find it useful.
If you need to know how to offset threads for 3D printing then I've created a guide here which you might find useful.
If you would like to send me a tip for any help I've provided or for any of my software applications you've found useful, you can do this via my Ko-Fi page here.
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