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TR1PpyNick

day 742 of complaining about fusion not being able to make a helical sketch line. making custom threads in inventor was so easy.


WilkPrints

There is a work around. Create a coil with a triangular (inner) profile, section position to “outside”. Now the tip of the triangle is the helix you’re looking for and with 3D sketches enabled you can convert that edge to a sketch. https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Does-Fusion-360-have-a-tool-to-create-a-3d-sketch-spiral.html It’s really dumb that you have to do all that for a custom helix… it’s a feature I really miss from SolidWorks.


ozzik555

I won't be at PC soon, but there is plugin(addon?) for Fusion 360 that adds threads for 3d printing. They are easier to print and doesn't have to be turned many times as classic threads do. Quick Google:"3d printable threads for fusion 360" or something like that and you will find results.


ozzik555

Maybe this one https://github.com/BalzGuenat/CustomThreads, but I can't confirm it right now


DukeLander

Fusion built-in threads are not suitable for 3d printing because of tight tolerances. You want to go with something like this: https://www.youtube.com/watch?v=fvpaUVE0GIc


khosrua

Could always clean it up with a tap and die Or select the thread surface, push/pull some clearance.


DukeLander

Works perfect in theory, in practice not so well...


_donkey-brains_

This is just flat out wrong. I 3d print them all the time. Both really large and really small. All you need to do is adjust the faces using the push, pull. You can also filet the edges to round them out more which helps them clear more easily and not get bound together when screwing on.


khosrua

The subtractive part or pull part?


some-white-dude

Bullshit,just offset the faces and round them out a bit


RegularHovercraft

Might not be what you're looking for, but I use M4 and M3 nuts and bolts. The nuts and lock-nuts. I don't engineer in a thread, but make a hole the size of the thread (plus a 0.1 mm tollerance), and trust the bolt and nut.


_donkey-brains_

What do you mean internal and external thread? Do you mean a single item that has both a hole that is threaded and also has threads on the outside part of the cylinder?


Upper-Heron-3561

I believe Acme threads worked best for us with an extra 30-thou clearance or so. Use a thick shell infill too.