I agree with you CNC_Kid, that would be nice to have !
Most of the times we don't need 3D detail of thread, but last month I had to do a few to get CNC machined parts in China... and that was tedious.

Yep, it would be very useful for modelling, and I remember asking for this years ago. I know you can create a spiral extruded shape and subtract this, but it's a little fiddly.
Always envious of the Inventor folks near me that do this in a jif.

Mike

PS ...and a metric option please. :)

I disagree. There are lots of sites that offer 3D parts that can be used as symbols or xrefs that won't have as much detriment on file performance as thread geometry representation. You only have to produce a thread size once if you do it yourself, really. 3D printing and rapid prototyping can call for thread models, but they're more likely to be custom threads or ACME than standard machine threads. A few people might need this for very narrow interests, but building it into the program means that the investment in software development time would be subsidised by lots more people who don't.

It would be ideal to have a choice of cosmetic or modelled helical threads
in the model. The most important issue for me is Model to Sheet.
Model to Sheet needs to use the model threads to place the correct threads
in the drawing.
The amount of work needed to make a drawing is very time consuming, and
yes, contrary to popular belief, customers still need a drawing. The
drawing is a legal document showing revision levels, changes, material
etc. and has the required signatures and initials of engineers, quality control,
etc.responsible for the products they are ordering or producing.
We need the models for CNC production, the models are nice to look, but we
still have mountains of paper drawings on the shop floor, hanging in folders
on machines, work benches, file cabinets in quality control, and also
on my desk.

Hi again,

I import models from TraceParts Online, and although they show a thread form, I don't ever recall seeing any with threads form in a downloaded STEP file.
I do have saved fastener models were I have created a thread form, using a spiral path and a triangular sectioned extrusion, but it's a faff.
If you had a quick way of generating this spiral thread form, say positive or negative, that would be a huge improvement, then I could subtract this from downloaded STEP models to create threaded components or threaded holes quicker.

Jeepers, if you can get 3D dovetailing tools for woodwork in Shark FX, it's not such a huge leap, and it's hardly a bloat on file size. For CNC work, I usually omit the threads, as some CAM software doesn't like seeing them, and it's easier to spec it during the CAM process as another operation, but for 3D printing it'd be useful.

Just my 2¢, but I'm biased ;)
Mike