Drawing M28 x 0.75 thread

[Anthony_Yan]

Don’t know if this would help, but I created a tool in Grasshopper to generate custom helical threads.

To get M28x0.75 you would need to make the thread-profile yourself, then set it at the proper radius. The tool would then generate the helix for you (for a specified length).

Asking for Feedback: ChiralSym Thread Generator (4.5.3)

Here is a helical thread-generator I’ve been working on. Mostly intended to generate custom-threads for 3d-printing. However, it might be useful for other people. Despite the “simplicity” of helical threads, getting everything together turned out to be much more work than I expected. Especially when allowing for tapered threads. Please have a look, and let me know if anything breaks, or how to improve this Grasshopper script. I’m using this project to learn Grasshopper as well as make some…

Info about metric thread profiles can be found here:

ISO metric screw thread

The ANSI-Thread-Hex-Bolt-Generator that Jessesn mentioned looks good to me, but it seems that it doesn’t have metric threads in its data tables? I fiddled with it for a few minutes, but only saw imperial threads. If it can do metric threads, then that is probably a better solution.

I think there is one other bolt-generator on www.food4rhino.com. You might look at that one too. I think it’s called BoltGen and does metric.
https://www.food4rhino.com/en/app/boltgen-manuals-and-help-rhinoceros-windows-and-mac

Hope at least one of these is a solution for you!
Feel free to ask if you need more help.